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COMSPHERE 3600 SERIES DA T A SER VICE UNITS MODELS 3610 AND 361 1 TIME DIVISION MUL TIPLEXER, MUL TICHANNEL MUL TIPOINT , AND DIGIT AL BRIDGE OPTIONS APPLICA TIONS GUIDE Document No.
COMSPHERE 3600 Series Data Service Units A March 1999 3610-A2-GB41-60 COMSPHERE 3600 Series Data Service Units Models 3610 and 361 1 T ime Division Multiplexer , Multichannel Multipoint, and Digital B.
Safety Instructions B 3610-A2-GB41-60 March 1999 ! Important Safety Instructions 1. Read and follow all warning notices and instructions marked on the product or included in the manual. 2. This product is intended to be used with a 3-wire grounding type plug — a plug which has a grounding pin.
COMSPHERE 3600 Series Data Service Units C March 1999 3610-A2-GB41-60 Notices .
i 3610-A2-GB41-60 March 1999 T able of Contents Preface About this Guide vii . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . How to Use this Guide vii . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMSPHERE 3600 Series Data Service Units ii March 1999 3610-A2-GB41-60 3. Model 361 1 Installation Overview 3-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hardware Straps 3-3 . . . . . . . . . . . .
T able of Contents iii 3610-A2-GB41-60 March 1999 List of Figures Figure Page 1-1 Model 3610 DSU with TDM or MCMP 1-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Model 361 1 DSU with TDM or MCMP 1-8 . . . . . . . . . . . . .
COMSPHERE 3600 Series Data Service Units iv March 1999 3610-A2-GB41-60 Figure Page 4-25 Case 4 – Backing Up (Up to) Three Channels via the FEP Port-Sharing Feature 4-32 . . 4-26 Digital Bridge/DCE Interface 4-33 . . . . . . . . . . . . . . . . . . .
T able of Contents v 3610-A2-GB41-60 March 1999 Figure Page D-7 Extended Bridge Configuration: Automatic Partial Backup – Dial Backup Not Active D-15 .
COMSPHERE 3600 Series Data Service Units vi March 1999 3610-A2-GB41-60 List of T ables T able Page 4-1 LADS Connection Distances 4-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 TDM and MCMP Status Indicators (Model 361 1 Only) 5-5 .
vii 3610-A2-GB41-60 March 1999 Preface About this Guide This applications guide is intended as a supplement to the operator ’ s guide; it only contains installation and operation information that is.
COMSPHERE 3600 Series Data Service Units viii March 1999 3610-A2-GB41-60 Related Documents Basic DSU product documentation includes the following: 3610-A2-GB46 COMSPHERE 3600 Series Data Service Units.
1-1 3610-A2-GB41-60 March 1999 Overview Overview 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Standard Features 1-2 . . . . . . . . . . . . . . .
COMSPHERE 3600 Series Data Service Units 1-2 March 1999 3610-A2-GB41-60 LPDA-2 interoperability is provided by the systems network architecture (SNA) Diagnostic Interface option that is installed on the DSU circuit card.
Overview 1-3 3610-A2-GB41-60 March 1999 • Port speeds. Speeds of the individual TDM ports (1 through 6) can be set to 1.2, 2, 2.4, 4, 4.4, 4.8, 7.2, 8.4, 9.2, 9.6, 12, 14.4, 16.8, 18, 18.8, 19.2, 28.8, 32, 38.4, 48, 56, or 64 kbps full-duplex. The sum of the port speeds cannot exceed the line speed.
COMSPHERE 3600 Series Data Service Units 1-4 March 1999 3610-A2-GB41-60 DSU with MCMP Capability The MCMP capability is an enhancement to TDM and allows up to six independent application programs to share one standard 56 kbps multipoint facility .
Overview 1-5 3610-A2-GB41-60 March 1999 DSU with Digital Bridge Capability The digital bridge capability is dedicated to a single DSU, and the data terminal equipment (DTE) connected to that DSU is usually the controlling DTE of a multipoint network. Both TDM and MCMP can be configured to provide the digital bridge capability .
COMSPHERE 3600 Series Data Service Units 1-6 March 1999 3610-A2-GB41-60 Models The 3600 Series DSUs are available in two models: • Model 3610 is a standalone desktop unit. • Model 361 1 is a circuit card for installation in a COMSPHERE 3000 Series Carrier .
Overview 1-7 3610-A2-GB41-60 March 1999 496-13091-04 EIA232D/V .24 INTERF ACE (PORT 1) V .35 INTERF ACE (PORT 1) NETWORK DIAGNOSTIC INTERF ACE DBM INTERF ACE DDS INTERF ACE LOW VOL T AGE AC POWER IN C.
COMSPHERE 3600 Series Data Service Units 1-8 March 1999 3610-A2-GB41-60 Figure 1-2. Model 361 1 DSU with TDM or MCMP.
Overview 1-9 3610-A2-GB41-60 March 1999 DBM T ypes Three dial backup modules (DBMs) are available. A DBM is optional and provides an alternate data path in case the digital connection fails. Each of the three DBM types listed below occupy one slot in the COMSPHERE 3000 Series Carrier .
COMSPHERE 3600 Series Data Service Units 1-10 March 1999 3610-A2-GB41-60.
2-1 3610-A2-GB41-60 March 1999 Model 3610 Installation Overview 2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hardware Straps 2-2 . . . . . . . .
COMSPHERE 3600 Series Data Service Units 2-2 March 1999 3610-A2-GB41-60 This chapter contains only installation information that is specific to a TDM or MCMP , including the Flex and DSD options. NOTE Unless specifically noted, TDM refers to a TDM, TDM/Flex, or TDM/DSD, and MCMP refers to an MCMP , MCMP/Flex, or MCMP/DSD.
Model 3610 Installation 2-3 3610-A2-GB41-60 March 1999 Figure 2-1. Model 3610 TDM/Flex or MCMP/Flex Switch Locations Figure 2-2. Model 3610 TDM/DSD or MCMP/DSD Circuit Card Switch Locations.
COMSPHERE 3600 Series Data Service Units 2-4 March 1999 3610-A2-GB41-60 Changing Hardware Settings If you have a new TDM/Flex or MCMP/Flex or if you ordered a Flex field installation upgrade for a DSU having firmware version 6.
Model 3610 Installation 2-5 3610-A2-GB41-60 March 1999 3. Disconnect the keypad flat cable from the DSU circuit card by squeezing the latches on each side of the cable and gently pulling up (refer to Figure 2-4). 4. Disconnect the LCD flat cable by gently working the cable, not the connector , free of its connector .
COMSPHERE 3600 Series Data Service Units 2-6 March 1999 3610-A2-GB41-60 Changing the Flex Interface Switch The TDM or MCMP field installation upgrade is shipped from the factory with the switch position set to EIA-232. The following procedure tells you how to change this setting to V .
Model 3610 Installation 2-7 3610-A2-GB41-60 March 1999 Changing the DSD Option Card The TDM/DSD or MCMP/DSD is shipped from the factory with the option card set to EIA-232. The following procedure tells you how to change this setting to V .35 or back to EIA-232.
COMSPHERE 3600 Series Data Service Units 2-8 March 1999 3610-A2-GB41-60 Electrical Connection CAUTION The power cord with ac transformer contains a 3-wire grounding-type plug which has a grounding pin. This is a safety feature. Grounding of the unit is vital to ensure safe operation.
Model 3610 Installation 2-9 3610-A2-GB41-60 March 1999 T ABLE-TOP AC TRANSFORMER W ALL-MOUNT AC TRANSFORMER SNAP T ABS (4) FRONT BEZEL FRONT BEZEL COMSPHERE 3610 COMSPHERE 3610 V .
COMSPHERE 3600 Series Data Service Units 2-10 March 1999 3610-A2-GB41-60 If the DSU, DBM, TDM or MCMP (MUX) fails the power -up test: " Procedure 1. Reinstall the factory configuration options; use the FacT configuration for a tributary or FacC for a control.
Model 3610 Installation 2-1 1 3610-A2-GB41-60 March 1999 T o change configuration options of the Model 3610 DSU from the DCP or the Model 3610 from an async terminal, select the Local branch, then the Configuration (Confg) branch. (If not displayed, press the key until Confg is displayed, then press the function key below the selection.
COMSPHERE 3600 Series Data Service Units 2-12 March 1999 3610-A2-GB41-60 V erification T esting Perform verification testing after any installation. After installing and configuring a network, includi.
Model 3610 Installation 2-13 3610-A2-GB41-60 March 1999 Adding a TDM/Flex or MCMP/Flex to an Installed Model 3610 DSU This section describes the procedure for adding a TDM/Flex or MCMP/Flex upgrade for the Model 3610 DSU.
COMSPHERE 3600 Series Data Service Units 2-14 March 1999 3610-A2-GB41-60 Getting Started As you follow these steps, refer to Figure 2-8. " Procedure 1. Unplug the table-top ac transformer from the ac outlet, then disconnect the power cord from the DSU’ s rear panel (labeled POWER).
Model 3610 Installation 2-15 3610-A2-GB41-60 March 1999 Removing the DSU from Its Base Refer to Figure 2-4 as you follow these steps. If replacing a TDM or MCMP , refer to this figure as you remove the current TDM or MCMP .
COMSPHERE 3600 Series Data Service Units 2-16 March 1999 3610-A2-GB41-60 Reassembling the Unit Refer to Figure 2-4 as you close the unit and Figure 2-8 to reconnect cables. " Procedure 1. Align the cover over the expanded base and rear panel. Make sure the four snap tabs are over their corresponding slots (two in front and two in back).
3-1 3610-A2-GB41-60 March 1999 Model 361 1 Installation Overview 3-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Non-Modular DSU with a TDM or MCMP 3-2 .
COMSPHERE 3600 Series Data Service Units 3-2 March 1999 3610-A2-GB41-60 Non-Modular DSU with a TDM or MCMP The non-modular Model 361 1 DSU-TDM or DSU-MCMP has connectors mounted directly onto the circuit cards. W ith this type of unit, the DTE cables must be disconnected before the unit can be removed from the carrier .
Model 361 1 Installation 3-3 3610-A2-GB41-60 March 1999 Hardware Straps HANDLING PRECAUTIONS FOR ST A TIC-SENSITIVE DEVICES This pr oduct is designed to pr otect sensitive components from damage due to electrostatic discharge (ESD) during normal operation.
COMSPHERE 3600 Series Data Service Units 3-4 March 1999 3610-A2-GB41-60 Figure 3-2. Modular TDM/MCMP Circuit Card Switch Locations Software Configuration A default software configuration is loaded in the DSU at the factory .
Model 361 1 Installation 3-5 3610-A2-GB41-60 March 1999 For the 6700 Series NMS, configuration options are menu-driven. Select Config → Network → Devices → the appropriate submenu selection.
COMSPHERE 3600 Series Data Service Units 3-6 March 1999 3610-A2-GB41-60 For a DSU equipped with MCMP: " Procedure 1. Fr om the contr ol DSU , go to the Control ( Ctrl ) branch, select LEDs , and then select Aggregate ( Aggr ) to monitor the aggregate 56 kbps digital signal.
Model 361 1 Installation 3-7 3610-A2-GB41-60 March 1999 Installing a Non-Modular TDM or MCMP This section describes the procedure for adding a non-modular TDM or MCMP circuit card onto a Model 361 1 DSU and then into a COMSPHERE 3000 Series Carrier .
COMSPHERE 3600 Series Data Service Units 3-8 March 1999 3610-A2-GB41-60 Press the latches to secure the DSU and TDM or MCMP circuit cards in the carrier to prevent the DSU-TDM or DSU-MCMP unit from being dislodged during installation of the DTE interfaces.
Model 361 1 Installation 3-9 3610-A2-GB41-60 March 1999 Figure 3-3. Non-Modular TDM or MCMP Installation.
COMSPHERE 3600 Series Data Service Units 3-10 March 1999 3610-A2-GB41-60 Installing a Modular TDM or MCMP This section describes the procedure for adding a modular TDM or MCMP circuit card onto a Modular 361 1 DSU and then into a COMSPHERE 3000 Series Carrier .
Model 361 1 Installation 3-1 1 3610-A2-GB41-60 March 1999 T o remove the installed Modular 361 1 DSU: " Procedure 1. Use a Phillips screwdriver to loosen the screw holding the circuit pack lock on the Modular 361 1 DSU, and rotate the lock to the open position (Figure 3-5).
COMSPHERE 3600 Series Data Service Units 3-12 March 1999 3610-A2-GB41-60 T o install the 6-port connector module and add the TDM or MCMP option to a Modular 361 1 DSU: " Procedure 1. At the rear of the carrier , set the tabs on the 6-port connector module into the slotted grooves on the carrier ’ s backplane.
Model 361 1 Installation 3-13 3610-A2-GB41-60 March 1999 Removing TDM or MCMP from an Installed Model 361 1 DSU T o remove the TDM or MCMP circuit card: " Procedure 1. For a non-modular DSU-TDM or DSU-MCMP unit , disconnect the DTE interface cable from the DSU, and disconnect the multiport cable from the TDM or MCMP .
COMSPHERE 3600 Series Data Service Units 3-14 March 1999 3610-A2-GB41-60.
4-1 3610-A2-GB41-60 March 1999 Principles of Operation Overview 4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Network T erminology 4-2 . . . . . .
COMSPHERE 3600 Series Data Service Units 4-2 March 1999 3610-A2-GB41-60 Setup – DBM Rate Less Than DSU Rate 4-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Manual DDS Restoration 4-47 . . . . . . . . . . .
Principles of Operation 4-3 3610-A2-GB41-60 March 1999 Multipoint T ransmission In multipoint transmission (Figure 4-1), a control DSU is connected through the digital facility to multiple tributaries communicating at the same rate.
COMSPHERE 3600 Series Data Service Units 4-4 March 1999 3610-A2-GB41-60 Modes Of Operation A DSU with TDM or MCMP can operate in one of four modes: TDM mode (MUX Funct: TDM), MCMP mode (MUX Funct: MCMP), Bridge mode (MUX Funct: CBrdg or EBrdg), or Basic mode (MUX Funct: None).
Principles of Operation 4-5 3610-A2-GB41-60 March 1999 T ime Division Multiplexing Since transmission facilities are expensive, and frequently two or more low-speed point-to-point applications can share a high-speed digital facility , it is more efficient to share that capacity .
COMSPHERE 3600 Series Data Service Units 4-6 March 1999 3610-A2-GB41-60 Speed Characteristics In time division multiplexing, the speed of the DDS line must equal or exceed the combined speeds of digital signals to be transmitted at each DTE interface.
Principles of Operation 4-7 3610-A2-GB41-60 March 1999 TDM Architecture Figure 4-3 shows a high-level view of the TDM architecture. Port 1 on the DSU is routed to the TDM or MCMP , where it is multiplexed with Ports 2 through 6. The aggregate data path of the multiplexer is routed back to the DDS core* by the data router .
COMSPHERE 3600 Series Data Service Units 4-8 March 1999 3610-A2-GB41-60 TDM Applications The TDM capability can be used in a variety of configurations to enhance DDS service.
Principles of Operation 4-9 3610-A2-GB41-60 March 1999 Multipoint Async Compatibility The control DSU with the Single-Port Async/Sync feature is compatible with earlier DSU releases that use a TDM with the ports configured as a single port-sharing group, as long as the control DSU’ s port speed and port-sharing group port speeds are the same.
COMSPHERE 3600 Series Data Service Units 4-10 March 1999 3610-A2-GB41-60 Point-to-Point Multiplexing The 3600 Series DSU operating in TDM mode can be used for point-to-point circuits at speeds of up to 64 kbps. Figure 4-6 shows a typical TDM application.
Principles of Operation 4-1 1 3610-A2-GB41-60 March 1999 TDM Backbone Circuit with Extensions Figure 4-7 shows a 3600 Series DSU with TDM as the DDS backbone with an analog private line (APL) extended circuit.
COMSPHERE 3600 Series Data Service Units 4-12 March 1999 3610-A2-GB41-60 Figure 4-8. Digital Sharing.
Principles of Operation 4-13 3610-A2-GB41-60 March 1999 Multiplexing and Digital Sharing When digital sharing is combined with the TDM or MCMP multiplexing capability , in-band framing must be taken into account. The TDM circuit card can support up to two digital-sharing groups, while the MCMP circuit card can support up to three.
COMSPHERE 3600 Series Data Service Units 4-14 March 1999 3610-A2-GB41-60 FEP Port Sharing FEP port sharing is a method of connecting a front-end processor (FEP) to multiple control DSUs/modems to broadcast the same message over different circuits, yet receive individual responses.
Principles of Operation 4-15 3610-A2-GB41-60 March 1999 Figure 4-10. FEP Port Sharing.
COMSPHERE 3600 Series Data Service Units 4-16 March 1999 3610-A2-GB41-60 TDM Backup A point-to-point multiplexing circuit can be backed up through the switched telephone network. There are five possible configurations: • Case 1 – V .32 Backup for subrate DDS ( Figure 4-1 1 ).
Principles of Operation 4-17 3610-A2-GB41-60 March 1999 • Case 2 – V .32 Backup for high-speed DSU ( Figure 4-12 ). The DBM port speeds must be reconfigured so that their sum is less than or equal to 14.4 kbps, the PSTN line speed. When the sum equals the line speed ( now 14.
COMSPHERE 3600 Series Data Service Units 4-18 March 1999 3610-A2-GB41-60 • Case 3 – V .32 Backup for high-speed DSU with extended circuits ( Figure 4-13). When the backbone circuit is restored at 14.4 kbps, the port speeds at the tributary DSU may need to be reduced.
Principles of Operation 4-19 3610-A2-GB41-60 March 1999 • Case 4 – Switched 56 Backup for DSU operating at 56 kbps or less ( Figure 4-14 ) . The Switched 56 DBM provides full backup of point-to-point single port and TDM circuits operating at 56 kbps.
COMSPHERE 3600 Series Data Service Units 4-20 March 1999 3610-A2-GB41-60 • Case 5 – Aggr egate Switched Backup for TDM Circuits ( Figure 4-15 ). A point-to-point TDM circuit can be backed up using the aggregate switch capability of the DSU. This may be useful if the DBMs are shared via an external switch.
Principles of Operation 4-21 3610-A2-GB41-60 March 1999 Multichannel Multipoint The MCMP capability reduces the number of parallel multipoint digital private lines required by independent applications. Mer ging applications onto a single communications circuit reduces line, DCE, and maintenance costs (Figures 4-16 and 4-17 ).
COMSPHERE 3600 Series Data Service Units 4-22 March 1999 3610-A2-GB41-60 At the control DSU, each application in Figure 4-16 is given its own channel (A, B, or C ), and the channels are assigned to Ports 1 through 3.
Principles of Operation 4-23 3610-A2-GB41-60 March 1999 Line and Channel Speeds The MCMP capability operates only on a 56 kbps DDS multipoint circuit. Speeds of any channel can be set to the synchronous speed of 1.2, 2.4, 4.8, 7.2, 9.6, 12, 14.4, 16.8, 19.
COMSPHERE 3600 Series Data Service Units 4-24 March 1999 3610-A2-GB41-60 MCMP Architecture Figure 4-18 shows a high-level view of the MCMP architecture. The data paths are established as in the TDM mode of operation via the data router . Additional multichannel multipoint circuitry is activated on the MCMP circuit card.
Principles of Operation 4-25 3610-A2-GB41-60 March 1999 MCMP Operation For proper MCMP operation, the network must be initialized, with the tributary DSUs added to the control DSU’ s poll list.
COMSPHERE 3600 Series Data Service Units 4-26 March 1999 3610-A2-GB41-60 MCMP The MCMP capability provides multichannel multipoint operation over a 56 kbps DDS multipoint facility .
Principles of Operation 4-27 3610-A2-GB41-60 March 1999 NOTE If the digital-sharing group consists of adjacent ports, the digital-sharing group can be created via an alternate method using the Sharing Device A (Share DevA) and Sharing Device B (Share DevB) configuration options.
COMSPHERE 3600 Series Data Service Units 4-28 March 1999 3610-A2-GB41-60 MCMP Backup Backup may be achieved in one of five ways: • Case 1 – Dedicated MCMP Backup with Switched 56 DBMs ( Figure 4-21). In this case, two DBM-Ss are dedicated to the control DSU- MCMP .
Principles of Operation 4-29 3610-A2-GB41-60 March 1999 • Case 2 – Backing up as many channels as possible to the one most important tributary location ( Figure 4-22). In this case, the control DSU and the one tributary DSU selected for dial backup must be equipped with a DBM configured with MCMP Backup set to TDM.
COMSPHERE 3600 Series Data Service Units 4-30 March 1999 3610-A2-GB41-60 • Case 3 – Backing up one complete channel (both partial and full backup) ( Figures 4-23 and 4-24 ).
Principles of Operation 4-31 3610-A2-GB41-60 March 1999 When backup is provided for one channel, the MCMP circuit can support a total of five application channels, and the control DSU must have the backup port and the next highest port configured as an FEP port-sharing group.
COMSPHERE 3600 Series Data Service Units 4-32 March 1999 3610-A2-GB41-60 • Case 4 – Backing up ( up to ) three channels at each tributary via the FEP port-sharing feature ( Figure 4-25 ). In this case, each tributary DSU to be backed up must be equipped with a DBM and the MCMP Backup configuration option should be set to TDM.
Principles of Operation 4-33 3610-A2-GB41-60 March 1999 There are several restrictions to implementation: • There can be at most three DTE inputs (channels).
COMSPHERE 3600 Series Data Service Units 4-34 March 1999 3610-A2-GB41-60 • Case 5 – Aggr egate switched backup for MCMP circuits. An MCMP circuit can be backed up using the aggregate switch capability of the DSU.
Principles of Operation 4-35 3610-A2-GB41-60 March 1999 Digital Bridge A TDM or MCMP circuit card can be configured to perform digital bridge capability . This is a special case of digital sharing where all active ports on the bridge are configured to one digital-sharing group with or without contention.
COMSPHERE 3600 Series Data Service Units 4-36 March 1999 3610-A2-GB41-60 If more bridging capability is needed, additional DSU-TDM or DSU-MCMP units configured as an extended bridge (EBrdg) can be connected to the central-site bridge, the controlling bridge.
Principles of Operation 4-37 3610-A2-GB41-60 March 1999 For non-modular Model 361 1 DSUs with digital bridge capability , a digital bridge interface (crossover) cable attaches to the 60-pin high-density connector on the TDM or MCMP circuit card to provide fan-out cabling to five individual 25-pin EIA-232 connectors.
COMSPHERE 3600 Series Data Service Units 4-38 March 1999 3610-A2-GB41-60 Diagnostic Considerations The digital bridge joins the aggregate data stream, including data, framing bits, and diagnostics. The diagnostic communication with tributary DSUs and DBMs is transparent to the digital bridge.
Principles of Operation 4-39 3610-A2-GB41-60 March 1999 Figure 4-31. Multipoint DDS Circuit in Partial Backup.
COMSPHERE 3600 Series Data Service Units 4-40 March 1999 3610-A2-GB41-60 Multipoint Backup Addressing For a central-site multipoint dial backup configuration, the digital bridge is controlled by the control DSU.
Principles of Operation 4-41 3610-A2-GB41-60 March 1999 Figure 4-33. T ributary Addressing via Backup Connections.
COMSPHERE 3600 Series Data Service Units 4-42 March 1999 3610-A2-GB41-60 Multipoint Backup Architecture In a central-site multipoint dial backup configuration during partial backup (configuration option Bridge Rate is set to =DSU), the first port of the digital bridge is included in the digital-sharing group.
Principles of Operation 4-43 3610-A2-GB41-60 March 1999 Data from the controlling DTE is broadcast to all ports in the digital-sharing group, including the first port of the digital bridge, where data is then directed through the DSU to the DDS line.
COMSPHERE 3600 Series Data Service Units 4-44 March 1999 3610-A2-GB41-60 When full backup is in effect, there is no longer any data communication from the DDS line. All tributaries are communicating with the controlling DTE via the digital bridge capability .
Principles of Operation 4-45 3610-A2-GB41-60 March 1999 Figure 4-37. Central-Site Bridging Architecture (56 kbps) – Active Digital Bridge Central-Site DBM-Vs/DBM-Ss/DBM-Ds At the central site, a DBM is required for each drop to be backed up. A DBM-V may be used for V .
COMSPHERE 3600 Series Data Service Units 4-46 March 1999 3610-A2-GB41-60 DBM-V/DBM-S/DBM-D Dial on DTR Capability When the central site loses access to its remote DSUs, the DBM-Vs, DBM-Ss, and DBM-Ds can initiate backup based upon the state of the DBM’ s DTR lead.
Principles of Operation 4-47 3610-A2-GB41-60 March 1999 T ributaries with Multiple Call capability should use this capability to increase their probability of connection to the bridge. The telephone numbers of all DBMs on the bridge should be entered into the tributary’ s directory .
COMSPHERE 3600 Series Data Service Units 4-48 March 1999 3610-A2-GB41-60 LADS Operation The 3600 Series DSUs can be used as a local area data set ( LADS ) to provide a point-to-point link between two data devices having like protocols. The network facility is a direct 4-wire connection without using a digital service.
Principles of Operation 4-49 3610-A2-GB41-60 March 1999 Point-to-Point LADS T wo 3600 Series DSUs that are connected by a 4-wire, nonloaded metallic pair can support point-to-point LADS operation. A typical scenario involves two data devices located in the same building or in a campus environment.
COMSPHERE 3600 Series Data Service Units 4-50 March 1999 3610-A2-GB41-60 Figure 4-38. Bridged LADS Operation.
Principles of Operation 4-51 3610-A2-GB41-60 March 1999 Bridged LADS Architecture One TDM circuit card operating in Bridge mode can support up to six tributary DSUs ( Figure 4-39 ). In the transmit direction, data from the controlling DTE is broadcast to all ports in the digital-sharing group.
COMSPHERE 3600 Series Data Service Units 4-52 March 1999 3610-A2-GB41-60 Digital Bridge/DSU Interface Figure 4-40 shows the interconnections between a digital bridge port and a central-site 3600 Series DSU.
Principles of Operation 4-53 3610-A2-GB41-60 March 1999 SNA Diagnostic Interface The SNA Diagnostic Interface option, which is compatible with IBM’ s LPDA-2 ( Line Problem Determination Aid, Revision 2 ) protocol, enables management of 3600 Series DSUs from the DCP , a Paradyne NMS, IBM’ s NetV iew management system, or all three.
COMSPHERE 3600 Series Data Service Units 4-54 March 1999 3610-A2-GB41-60 Figure 4-41. Sample Configuration and LPDA-2 Addressing Assigning an Address to the T ributary DSU The following rules apply to assigning the LPDA-2 address for tributary DSUs: 1.
Principles of Operation 4-55 3610-A2-GB41-60 March 1999 When digital sharing is used on a multipoint circuit, make sure there is no overlap of LPDA-2 tributary addresses. NetView-Initiated Dial Backup The 3600 Series DSUs support NetV iew-initiated dial backup in a point-to-point configuration only ( Figure 4-42 ).
COMSPHERE 3600 Series Data Service Units 4-56 March 1999 3610-A2-GB41-60 Multipoint Dial Backup The 3600 Series DSUs continue to support the DSU/CSU and Line Status command and the T ransmit/Receive T est during a multipoint dial backup. The Call Out and Disconnect commands are not supported in multipoint dial backup.
Principles of Operation 4-57 3610-A2-GB41-60 March 1999 Figure 4-44. Multiplexing with TDM (LPDA-2 Monitoring) Figure 4-45. Multiplexing with MCMP (LPDA-2 Monitoring).
COMSPHERE 3600 Series Data Service Units 4-58 March 1999 3610-A2-GB41-60 Digital Sharing Figures 4-46 and 4-47 show how digital sharing is used with LPDA-2 monitoring. When a digital-sharing group is configured on a tributary DSU, the DSU recognizes multiple LPDA-2 addresses instead of one.
Principles of Operation 4-59 3610-A2-GB41-60 March 1999 Figure 4-47. Digital Sharing in a Multipoint Circuit.
COMSPHERE 3600 Series Data Service Units 4-60 March 1999 3610-A2-GB41-60 Figure 4-48. Digital Sharing in a TDM Circuit (LPDA-2 Monitoring).
Principles of Operation 4-61 3610-A2-GB41-60 March 1999 Figure 4-49. Digital Sharing in an MCMP Circuit (LPDA-2 Monitoring).
COMSPHERE 3600 Series Data Service Units 4-62 March 1999 3610-A2-GB41-60.
5-1 3610-A2-GB41-60 March 1999 DSU Operations Overview 5-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diagnostic Control Panels 5-2 . . . . . . . .
COMSPHERE 3600 Series Data Service Units 5-2 March 1999 3610-A2-GB41-60 Overview This chapter identifies and discusses function and selection differences on the DSU when the TDM or MCMP optional feature is installed. It also discusses operation of DBM-Vs, DBM-Ss, and DBM-Ds, which are used in digital bridge applications.
DSU Operations 5-3 3610-A2-GB41-60 March 1999 Status Indicators The status indicators on the Model 3610 DSU’ s DCP and on the Model 361 1 DSU’ s faceplate continuously provide information on the current operating condition of the DSU.
COMSPHERE 3600 Series Data Service Units 5-4 March 1999 3610-A2-GB41-60 OK Alrm Status MCMP 496-12350b-01 3600 1 2 3 4 5 6 Por t TXD RXD RTS CTS DSR DTR LSD 103 104 105 106 107 108 109 OK Alrm T est Dial Status Front Panel Multirate DSU 361 1 496-12349-01 Figure 5-2.
DSU Operations 5-5 3610-A2-GB41-60 March 1999 T able 5-1 TDM and MCMP Status Indicators (Model 361 1 Only) Label Color Description OK Green Health and status indicator . The TDM or MCMP hardware and software are operating normally . This indicator flashes two times per second if a message is present.
COMSPHERE 3600 Series Data Service Units 5-6 March 1999 3610-A2-GB41-60 T able 5-2 DSU with TDM or MCMP and DBM-V/DBM-S/DBM-D Status Indicators Label Color Description OK Green Health and status indicator . The device’s operation is normal. (The device has not detected any of the alarms listed in the Alrm section below .
DSU Operations 5-7 3610-A2-GB41-60 March 1999 Menu Structure The menu tree is accessed via the DCP (SDCP for a DBM-V , DBM-S, or DBM-D) and is shown in Appendix A .
COMSPHERE 3600 Series Data Service Units 5-8 March 1999 3610-A2-GB41-60 • The Control ( Ctr l) branch provides the ability to display and change external leads, enable or disable the DSU-DBM, and access and monitor the external leads for Ports 1 through 6.
DSU Operations 5-9 3610-A2-GB41-60 March 1999 Health and Status Health and Status ( H/S ) enables you to display the status of the DSU, as well as a DBM, TDM or MCMP , if installed. It automatically scans for DSU and line conditions that are not within normal limits.
COMSPHERE 3600 Series Data Service Units 5-10 March 1999 3610-A2-GB41-60 Subnetwork Health and Status Subnetwork Health and Status ( Subn ) provides status information from a DSU’ s subnetwork (all DSUs and DBMs assigned to that DSU’ s active poll list).
DSU Operations 5-1 1 3610-A2-GB41-60 March 1999 Circuit Quality Circuit Quality ( Cir cQ ) only appears when a V .32 DBM is installed . The report shows the level and quality of the signal being received from the network by the V .
COMSPHERE 3600 Series Data Service Units 5-12 March 1999 3610-A2-GB41-60 Backup Branch The Backup ( Bckup ) branch controls operation of the point-to-point dial backup feature.
DSU Operations 5-13 3610-A2-GB41-60 March 1999 T able 5-5 Backup Branch Menu Selections Current DBM Mode Menu Selection Effect Idle Bkup Dial Dial out, establish, and switch to dialed link (Dial Backup mode). Dial out and establish dialed link (Standby mode).
COMSPHERE 3600 Series Data Service Units 5-14 March 1999 3610-A2-GB41-60 For a DSU configured as a central-site bridge with configuration option Bridge Rate set to =DDS , one of the following two scre.
DSU Operations 5-15 3610-A2-GB41-60 March 1999 Abort The Abort selection allows you to terminate a test that is running. When a test is running, the DBM is in T est mode and is not allowed to run any other test.
COMSPHERE 3600 Series Data Service Units 5-16 March 1999 3610-A2-GB41-60 If the DSU, TDM or MCMP (MUX), or DBM fails the test, the second line displays Fail instead of Pass. Also, the Alarm ( Alrm ) status indicator lights and the failure is reported in the DSU’ s Health and Status.
DSU Operations 5-17 3610-A2-GB41-60 March 1999 Loopback The Loopback ( Lpbk ) branch displays four loopbacks: • Local Loopback (LL) • DTE Loopback (DTE) • Digital Loopback (DL) • Remote Digita.
COMSPHERE 3600 Series Data Service Units 5-18 March 1999 3610-A2-GB41-60 While the DSU is in Local Loopback, any data transmission by the DTE is returned as received data. An operator can send a test pattern and verify correct reception of the test. The DSU does not monitor this testing.
DSU Operations 5-19 3610-A2-GB41-60 March 1999 DTE Loopback DTE Loopback ( DTE ) loops back the data path at the DTE/DCE interface on a per port basis without affecting the operation of the remaining ports (Figure 5-6). A message appears regarding successful loopback execution.
COMSPHERE 3600 Series Data Service Units 5-20 March 1999 3610-A2-GB41-60 Digital Loopback Digital Loopback ( DL ) is used for manual testing of the remote end of the circuit. For example, a remote Digital Loopback may be required in order to complete an external Bit Error Rate T est (BER T) from the remote DSU.
DSU Operations 5-21 3610-A2-GB41-60 March 1999 Selecting Aggr (Aggregate) loops back the user -transmitted data and the secondary channel transport data (if nondisruptive diagnostics are in effect). This disrupts secondary channel transport communications.
COMSPHERE 3600 Series Data Service Units 5-22 March 1999 3610-A2-GB41-60 Remote Digital Loopback Remote Digital Loopback ( RL ) is typically used to support testing by an external device, such as a protocol analyzer connected to the local DSU’ s DTE interface.
DSU Operations 5-23 3610-A2-GB41-60 March 1999 In a point-to-point network only , Remote Digital Loopback can also be initiated by the DTE by raising Pin 21 of the EIA-232-D/V .24 interface or Pin N of the V .35 interface, provided the Remote Digital Loopback by DTE (RL by DTE) configuration option is enabled.
COMSPHERE 3600 Series Data Service Units 5-24 March 1999 3610-A2-GB41-60 Bilateral Loopback Bilateral Loopback, shown in Figure 5-9, is a combination of DTE and Digital Loopbacks operating simultaneously in the same DSU.
DSU Operations 5-25 3610-A2-GB41-60 March 1999 Digital T est Digital T est ( DT ) is used to check the functionality of a pair of DSUs or DBMs and the data circuit between the pair . The local DBM transmits the 51 1-bit test pattern over the network to the remote DBM for an operator-specified length of time ( Figure 5-10 ).
COMSPHERE 3600 Series Data Service Units 5-26 March 1999 3610-A2-GB41-60 Figure 5-10. Digital T est.
DSU Operations 5-27 3610-A2-GB41-60 March 1999 Results When the message Command Complete is displayed, any key except the key returns you to the Digital T est submenu, where the Dsply and Clr selections appear . If Clr is selected while the test is running, the test starts again.
COMSPHERE 3600 Series Data Service Units 5-28 March 1999 3610-A2-GB41-60 Figure 5-1 1. End-to-End T est Results When the message Command Complete is displayed, any key except the key returns you to the End-to- End T est submenu, where the Displ and Clr selections appear .
DSU Operations 5-29 3610-A2-GB41-60 March 1999 Bit Error Rate T est The Bit Error Rate T est ( BER T ) is a session- disruptive test used to analyze the network circuit. This test requires network connection to the control and tributary DSUs or DBMs. A DTE connection to the remote DBM may be required.
COMSPHERE 3600 Series Data Service Units 5-30 March 1999 3610-A2-GB41-60 Figure 5-12. Bit Error Rate T ests in TDM or MCMP Mode.
DSU Operations 5-31 3610-A2-GB41-60 March 1999 Lamp T est The Lamp test is a test of the status indicators (LEDs) on the DSU’ s DCP (both models), and the LCDs on the Model 3610 DCP and the SDCP . When the Lamp test is performed on the Model 361 1, the alarm output is activated as well.
COMSPHERE 3600 Series Data Service Units 5-32 March 1999 3610-A2-GB41-60 Options The Options ( Opts ) submenu allows you to save, copy , and/or change configuration options. A DBM-V , DBM-S, or DBM-D can initiate a backup call using one of the following setup methods: fully automatic backup, partially automatic backup, or manual backup.
DSU Operations 5-33 3610-A2-GB41-60 March 1999 The Load fr om submenu displays the following selections: DBM SA VE DSU F1 Edit/Save : Gen Bkup MUX F2 F3 PrtSp Press the key to scroll the SA VE, DSU, and DBM selections into view; press the key to scroll the PrtSp selection into view .
COMSPHERE 3600 Series Data Service Units 5-34 March 1999 3610-A2-GB41-60 Figure 5-13 maps mode of operation to the applicable Configuration Option T ables (refer to Chapter 6 of the COMSPHERE 3600 Series Data Service Units, Models 3610 and 361 1, Operator ’ s Guide for these tables).
DSU Operations 5-35 3610-A2-GB41-60 March 1999 Figure 5-13. Choosing Mode of Operation and Setting Configuration Options.
COMSPHERE 3600 Series Data Service Units 5-36 March 1999 3610-A2-GB41-60 T able 5-9 Complete List of MUX Setup Configuration Options Option F nction Mode of Operation Option Function TDM MCMP Bridge MUX Funct Select mode of operation: TDM, MCMP , Bridge (CBrdg or EBrdg) or Basic (None).
DSU Operations 5-37 3610-A2-GB41-60 March 1999 Port Option Sets The Prt1 through Prt6 selections allow configuration options to be set on a per-port basis for TDM, MCMP , or Bridge mode. In TDM or MCMP mode, the Prt1 through Prt6 selections are available.
COMSPHERE 3600 Series Data Service Units 5-38 March 1999 3610-A2-GB41-60 T able 5-10 (1 of 2) Complete List of MUX Port Configuration Options Option F nction Mode of Function Option Function TDM MCMP Bridge Async → Sync Configure the port as asynchronous or synchronous.
DSU Operations 5-39 3610-A2-GB41-60 March 1999 T able 5-10 (2 of 2) Complete List of MUX Port Configuration Options Option Function Mode of Function DSR Frc On Enable port DSR lead to remain ON as long as the DSU is working, regardless of tests and network alarms.
COMSPHERE 3600 Series Data Service Units 5-40 March 1999 3610-A2-GB41-60 If in MCMP mode, the following is displayed: F1 Chang Prt Speed: DSU Chan F2 F3 Select the option set to be edited or changed.
DSU Operations 5-41 3610-A2-GB41-60 March 1999 The Add command is executed. A message is sent to the control DSU asking that the tributary be added to the polling list.
COMSPHERE 3600 Series Data Service Units 5-42 March 1999 3610-A2-GB41-60 T able 5-12 Directory Entry and Password Characters Character 1 Use 0—9 Dialing digit (These are the only characters accepted by the Switched 56 DBM.
DSU Operations 5-43 3610-A2-GB41-60 March 1999 Control Branch The Control ( Ctr l) branch allows you to enable or disable the DSU’ s transmitter, as well as the DBM’ s, and to display/change the status of the general purpose external DTE leads.
COMSPHERE 3600 Series Data Service Units 5-44 March 1999 3610-A2-GB41-60 T ransmitter Control T ransmitter Control ( TxCtl ) allows you to enable or disable the DSU’ s transmitter (DDS core), the DBM’ s transmitter (the DBM’ s call setup and answering capability), or to enable or disable individual ports when operating in TDM or MCMP mode.
DSU Operations 5-45 3610-A2-GB41-60 March 1999 F1 P r t 2 : Enable Enab Disab F2 F3 NOTE If the DSU core is disabled, enabling all ports in TDM or MCMP mode will not enable the DSU core. Y ou must specifically enable the DSU core. F1 P r t 2 : Disab Command Complete F2 F3 The local DBM can be enabled or disabled in the same manner as for the ports.
COMSPHERE 3600 Series Data Service Units 5-46 March 1999 3610-A2-GB41-60 When in TDM or MCMP mode, the selections are 1, 2, 3, 4, 5, 6, or Aggr . Aggr is the communications interface between the aggregate data path (on the TDM or MCMP circuit card) and the DSU.
A-1 3610-A2-GB41-60 March 1999 Data Service Unit Menu A.
COMSPHERE 3600 Series Data Service Units A-2 March 1999 3610-A2-GB41-60.
Data Service Unit Menu A-3 3610-A2-GB41-60 March 1999.
COMSPHERE 3600 Series Data Service Units A-4 March 1999 3610-A2-GB41-60.
B-1 3610-A2-GB41-60 March 1999 Configuration W orksheets Overview B-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Instructions B-1 . . . . . . . . .
COMSPHERE 3600 Series Data Service Units B-2 March 1999 3610-A2-GB41-60 This page intentionally left blank..
Configuration W orksheet for TDM Mode (1 of 3) Date:________________________________________________ Location:_____________________________________________ Local Phone Number: ( j )__________________________ Device:______________________________________________ Local Address:________________________________________ j DBM Installed Serial No.
Configuration W orksheet for TDM Mode (2 of 3) Prt6 Options V alue Async → Sync Enab, Disab Async Rate =Sync, 1800, 1200, 600, 300, 150 AsyncBit/Char 6, 7, 8, 9, 10 Stop Bits 1, 2 Overspeed 1.
Configuration W orksheet for TDM Mode (3 of 3) DBM Options V alue Rate(Kbps) { 14.4, 12.0, 9.6, 4.8, 2.4 TxClkSource { Int, RXC, DSU, Prt1, Prt2, Prt3, Prt4, Prt5, Prt6 CarrLossDisc { Y es, No Auto Re.
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Configuration W orksheet for MCMP Mode (1 of 3) Date:________________________________________________ Location:_____________________________________________ Local Phone No.: ( j )______________________________ Device:______________________________________________ Local Address:_________________________________________ j DBM Installed Serial No.
Configuration W orksheet for MCMP Mode (2 of 3) Prt6 Options V alue Async → Sync Enab, Disab Async Rate =Sync, 1800, 1200, 600, 300, 150 AsyncBit/Char 6, 7, 8, 9, 10 Stop Bits 1, 2 Overspeed 1.
Configuration W orksheet for MCMP Mode (3 of 3) General Options V alue DTE Port * EIA232, V .35 RTS Cntrl FrcOn, DTE CTS Cntrl Std, =RTS LSD Lead STD, Delay , FrcOn CTS Lead STD, Delay , FrcOn SystemS.
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Configuration W orksheet for Bridge Mode (1 of 2) Date:________________________________________________ Location:_____________________________________________ Local Phone No.: ( j )______________________________ Device:______________________________________________ Local Address:_________________________________________ j DBM Installed Serial No.
Configuration W orksheet for Bridge Mode (2 of 2) General Options V alue DTE Port EIA232, V .35 RTS Cntrl FrcOn CTS Cntrl Std, =RTS LSD Lead STD, Delay , FrcOn CTS Lead STD, Delay , FrcOn SystemStat E.
Configuration W orksheet for Basic Mode Date:_______________________________________________ Location:____________________________________________ Local Phone No.: ( j )_____________________________ Device:_____________________________________________ Local Address:________________________________________ j DBM Installed Serial No.
Configuration W orksheet for Basic (DBM-V , DBM-S, or DBM-D) Date:________________________________________________ Location:_____________________________________________ Local Phone No.
C-1 3610-A2-GB41-60 March 1999 Pin Assignments Overview C-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overview The pin assignments for the 3600 Series TDM and MCMP connectors and interfaces are included in this appendix.
COMSPHERE 3600 Series Data Service Units C-2 March 1999 3610-A2-GB41-60 Figure C-1. TDM Interface Cable (Feature Number 3600-F2-500) T able C-1 (1 of 3) Time Division Multiplexer Connector Used with N.
Pin Assignments C-3 3610-A2-GB41-60 March 1999 T able C-1 (2 of 3) Time Division Multiplexer Connector Used with Non-Modular TDM 60-Position High-Density Connector 25-Position Socket D-Sub P1 Pin Port.
COMSPHERE 3600 Series Data Service Units C-4 March 1999 3610-A2-GB41-60 T able C-1 (3 of 3) Time Division Multiplexer Connector Used with Non-Modular TDM 60-Position High-Density Connector 25-Position.
Pin Assignments C-5 3610-A2-GB41-60 March 1999 Figure C-2. Digital Bridge Interface Cable (Feature Number 3600-F2-501) T able C-2 (1 of 3) Digital Bridge Connector Used with Non-Modular TDM/MCMP 60-Po.
COMSPHERE 3600 Series Data Service Units C-6 March 1999 3610-A2-GB41-60 T able C-2 (2 of 3) Digital Bridge Connector Used with Non-Modular TDM/MCMP 60-Position High-Density Connector 25-Position Plug .
Pin Assignments C-7 3610-A2-GB41-60 March 1999 T able C-2 (3 of 3) Digital Bridge Connector Used with Non-Modular TDM/MCMP 60-Position High-Density Connector 25-Position Plug D-Sub P1 Pin Pin Port 1 4.
COMSPHERE 3600 Series Data Service Units C-8 March 1999 3610-A2-GB41-60 Figure C-3. Pin Locations on the 60-Position High-Density Connector of the Non-Modular Carrier-Mounted TDM/MCMP Circuit Card.
Pin Assignments C-9 3610-A2-GB41-60 March 1999 T able C-3 60-Position High-Density Connector (TDM/MCMP Ports 2 through 6 for Model 361 1 DSU) Pin (Ports 2 – 6) 1 Circuit Name F nction 2 3 4 5 6 EIA-.
COMSPHERE 3600 Series Data Service Units C-10 March 1999 3610-A2-GB41-60 T able C-4 EIA-232-D/V .24 Connector (Port 1) Pin Circuit Name F nction Pin EIA-232-D CCITT/V .
Pin Assignments C-1 1 3610-A2-GB41-60 March 1999 T able C-5 V .35 Connector (Port 1) Pin(s) Circuit Name F nction Pin(s) V .35 CCITT Function B AB 102 Signal Ground (SG) P, S BA 103 a, b T ransmit Dat.
COMSPHERE 3600 Series Data Service Units C-12 March 1999 3610-A2-GB41-60 99-16294 Figure C-4. Modular DSU V .35 Adapter (3000-F1-510).
Pin Assignments C-13 3610-A2-GB41-60 March 1999 T able C-6 Model 3610 (Ports 2 – 6) and Modular DSU 25-Pin V .35 Connector 25-Pin Connector (Model 3610 Ports 2 – 6) 34-Pin Connector (Modular DSU V .
COMSPHERE 3600 Series Data Service Units C-14 March 1999 3610-A2-GB41-60 Figure C-5. 6-Port Connector Module (Part Number 870-1700-001 1).
Pin Assignments C-15 3610-A2-GB41-60 March 1999 T able C-7 EIA-232/V .24 TDM/MCMP Connector (Modular and Standalone – Ports 2 through 6) Pin Circuit Name F nction Pin EIA-232 1 CCITT/V .
COMSPHERE 3600 Series Data Service Units C-16 March 1999 3610-A2-GB41-60 Figure C-6. 6-Port V .35 Interconnect Cable (Feature Number 3600-F3-500).
Pin Assignments C-17 3610-A2-GB41-60 March 1999 T able C-8 6-Port V .35 Interconnect Cable Connector 26-Pin Connector (Connector Module) 34-Pin Connector (6-port V .
COMSPHERE 3600 Series Data Service Units C-18 March 1999 3610-A2-GB41-60.
D-1 3610-A2-GB41-60 March 1999 Configuration Scenarios Overview D-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TDM Configuration Scenarios D-2 . .
COMSPHERE 3600 Series Data Service Units D-2 March 1999 3610-A2-GB41-60 NOTE In this appendix, full backup indicates that in order to operate, all remote devices must switch data to backup lines when one or more tributaries require backup.
Configuration Scenarios D-3 3610-A2-GB41-60 March 1999 Configuration Options For TDM scenario 1, use the Configuration W orksheet for TDM Mode and set the configuration options that follow for both the control and tributary DSU-TDMs.
COMSPHERE 3600 Series Data Service Units D-4 March 1999 3610-A2-GB41-60 TDM Scenario 2 – Using Switched 56 kbps Dial Backup In this configuration, shown in Figure D-2, the Switched 56 DBMs provide the capability for full backup of a TDM circuit operating at 56 kbps.
Configuration Scenarios D-5 3610-A2-GB41-60 March 1999 • PrtSp – DBM Prt1: 4.8 Prt2: 9.6 Prt3: 19.2 Prt4 through Prt6: Disab • DSU Rate(Kbps): 56 TxClkSource: DDS Msg Clamp: Enab AggrSwitch: Disab V .
COMSPHERE 3600 Series Data Service Units D-6 March 1999 3610-A2-GB41-60 Digital Bridge Configuration Scenarios The following scenarios describe four possible backup processes, which are used in typical customer networks: automatic partial backup, multipoint dial backup with tributary digital-sharing device, and network management controlled backup.
Configuration Scenarios D-7 3610-A2-GB41-60 March 1999 When 1 minute elapses, the two tributary DSUs (Figure D-4) instruct their DBMs to place a call to their respective DBM-Vs at the central site. (Each tributary DSU-DBM has been paired with a DBM-V that is associated with the control DSU-digital bridge at the central site.
COMSPHERE 3600 Series Data Service Units D-8 March 1999 3610-A2-GB41-60 Full Backup If the fault is with the central-site bridge’ s local loop ( a No Signal or a Bipolar V iolation alarm is reported for the central-site bridge ), the central-site bridge must be placed in Backup mode to eliminate problems with clock slippage (Figure D-5).
Configuration Scenarios D-9 3610-A2-GB41-60 March 1999 Configuration Options Set the central-site bridge configuration options as follows (Configuration W orksheet for Bridge Mode) • MUX – Setup M.
COMSPHERE 3600 Series Data Service Units D-10 March 1999 3610-A2-GB41-60 Set the configuration options for automatic partial backup of the tributary DSU as follows (Configuration W orksheet for Basic Mode): • DSU Rate(Kbps): 9.
Configuration Scenarios D-1 1 3610-A2-GB41-60 March 1999 Figure D-6. Multipoint Full Dial Backup with Nondisruptive Diagnostics Configuration If a network failure occurs so that the multipoint drops are lost, the 6800 Series NMS will display a T ributary Time-out alarm for the tributary DSUs, and a Facility Alarm for the control DSU.
COMSPHERE 3600 Series Data Service Units D-12 March 1999 3610-A2-GB41-60 T o end the backup session via the NMS , issue disconnect commands to the control DSU and all its DBM-Ss.
Configuration Scenarios D-13 3610-A2-GB41-60 March 1999 • Bkup Auto Bckup: Disab BckupOnCMI: Disab AutoRestor: Disab Set the configuration options for multipoint dial backup of a tributary DSU-DBM c.
COMSPHERE 3600 Series Data Service Units D-14 March 1999 3610-A2-GB41-60 Automatic Partial Backup Using an Extended Bridge The assumed automatic partial backup configuration scenario, where there is a.
Configuration Scenarios D-15 3610-A2-GB41-60 March 1999 Figure D-7. Extended Bridge Configuration: Automatic Partial Backup – Dial Backup Not Active.
COMSPHERE 3600 Series Data Service Units D-16 March 1999 3610-A2-GB41-60 Figure D-8. Extended Bridge Configuration: Automatic Partial Backup Active – Dial Backup Active for All Drops.
Configuration Scenarios D-17 3610-A2-GB41-60 March 1999 Figure D-9. Extended Bridge Configuration: Automatic Partial Backup Active – Dial Backup Active for T wo Drops.
COMSPHERE 3600 Series Data Service Units D-18 March 1999 3610-A2-GB41-60 During the backup session, each pair of communicating DBMs (the DBM-V and its tributary DBM) and the DDS network are active on the bridge. When the DDS network is restored, each tributary DSU drops its network alarm.
Configuration Scenarios D-19 3610-A2-GB41-60 March 1999 Set the extended bridge configuration options as follows (Configuration W orksheet for Bridge Mode): • MUX – Setup MUX Funct: EBrdg Bridge Rate: 9.
COMSPHERE 3600 Series Data Service Units D-20 March 1999 3610-A2-GB41-60 Figure D-10. NMS-Controlled Full Backup Configuration – Dial Backup Not Active.
Configuration Scenarios D-21 3610-A2-GB41-60 March 1999 Figure D-1 1. NMS-Controlled Full Backup Configuration – Dial Backup Active.
COMSPHERE 3600 Series Data Service Units D-22 March 1999 3610-A2-GB41-60 As a result of a network failure in the backbone DDS network, the control DSU reports a facility alarm to the NMS. The operator at the NMS workstation is alerted by the alarm, and examines the circuit’ s network map or circuit profile to see if backup is possible.
Configuration Scenarios D-23 3610-A2-GB41-60 March 1999 Configuration Options Set the central-site bridge configuration options as follows (Configuration W orksheet for Bridge Mode): • MUX – Setup MUX Funct: CBrdg Bridge Rate: 14.
COMSPHERE 3600 Series Data Service Units D-24 March 1999 3610-A2-GB41-60 Set configuration options for multipoint full dial backup using the DBM-V as follows (Configuration W orksheet for Basic (DBM-V.
Configuration Scenarios D-25 3610-A2-GB41-60 March 1999 MCMP Configuration Scenarios There are three different MCMP scenarios described in this section: one FEP port-sharing scenario and two dial backup scenarios.
COMSPHERE 3600 Series Data Service Units D-26 March 1999 3610-A2-GB41-60 Figure D-12. MCMP using FEP Port-Sharing Configuration.
Configuration Scenarios D-27 3610-A2-GB41-60 March 1999 Dedicated MCMP Backup with Switched 56 DBMs This scenario describes the Switched 56 kbps dial backup of an MCMP circuit (Figure D-13). The assumed configuration for this scenario is as follows: • Network is a 2-drop multipoint circuit operating at 56 kbps.
COMSPHERE 3600 Series Data Service Units D-28 March 1999 3610-A2-GB41-60 Next, send a dial command, followed by a Dial Mode ( dm ) command to each of the DBM-Ss performing backup. (A routine command can be created to issue the command sequence automatically .
Configuration Scenarios D-29 3610-A2-GB41-60 March 1999 • Diag – Gen Position: Cntrl for control; T rib for tributary LinkConfig: M-Pt • Gen DTE Port: EIA232 R TS Control: FrcOn • Bkup Auto Bc.
COMSPHERE 3600 Series Data Service Units D-30 March 1999 3610-A2-GB41-60 MCMP Backup Using FEP Port Sharing This configuration provides backup of two to three channels (Figure D-14).
Configuration Scenarios D-31 3610-A2-GB41-60 March 1999 • If all tributary DSUs are out of service, the control MCMP will have an Out-of-Frame alarm. • If a tributary is in Backup mode and the network problem has been fixed, the only commands that can be sent to the tributary from the control MCMP are aggregate tests (e.
COMSPHERE 3600 Series Data Service Units D-32 March 1999 3610-A2-GB41-60 • Prt2 and Prt4 (Prt6 N/A) Async → Sync: Disab for control; N/A for tributary TxCarrSel: Const for control; N/A for tributary RxCarrSel: Const for control; N/A for tributary Elast Stor: Disab for control; N/A for tributary • PrtSp – DBM Prt1: N/A for control; 7.
Configuration Scenarios D-33 3610-A2-GB41-60 March 1999 Set configuration options for automatic partial backup using the DSU-DBM-TDM as follows (Configuration W orksheet for TDM Mode): • MUX – Set.
COMSPHERE 3600 Series Data Service Units D-34 March 1999 3610-A2-GB41-60.
Index-1 3610-A2-GB41-60 March 1999 Index A abort, 5-15 adapter , V .35, C-12 adding, TDM/MCMP model 3610, 2-13 model 361 1, 3-6 address, control, DSU, 4-53 addressable devices, number of, 1-4 addresse.
COMSPHERE 3600 Series Data Service Units Index-2 March 1999 3610-A2-GB41-60 basic, mode, 4-4 digital test, 5-26 BER T bit error rate test, 5-29 dual, TDM/MCMP , 5-30 remote loopback, TDM/MCMP , 5-30 b.
Index Index-3 3610-A2-GB41-60 March 1999 DDS connections, 4-40 multipoint backup, 4-39 MCMP circuit, 4-22 restoration automatic, 4-47 manual, 4-47 dedicated backup, switched 56 DBM, D-27 MCMP , backup.
COMSPHERE 3600 Series Data Service Units Index-4 March 1999 3610-A2-GB41-60 E EIA-232/V .24, TDM/MCMP , connector , modular/standalone, C-15 EIA-232-D/V .
Index Index-5 3610-A2-GB41-60 March 1999 list, poll acquiring, 5-41 adding to, 5-40 local loopback, 5-17 menu subbranches, 5-7 locations, pin, non-modular , connector , circuit card, C-8 loopback, 5-1.
COMSPHERE 3600 Series Data Service Units Index-6 March 1999 3610-A2-GB41-60 multiplexing digital sharing, 4-13 MCMP , 4-57 point-to-point, 4-5, 4-10 TDM, 4-57 time division, 4-5 multipoint async compa.
Index Index-7 3610-A2-GB41-60 March 1999 port bridge, maximum capability , 4-36 capacity , 1-2 configuration, options, 5-38 connector , high density , model 361 1, C-9 option set, 5-37 single async/sy.
COMSPHERE 3600 Series Data Service Units Index-8 March 1999 3610-A2-GB41-60 status indicators, 5-5 synchronous channels, D-2 TDM/MCMP adding flex model 3610, 2-13 model 361 1, 3-6 connector , EIA-232/V .
Een belangrijk punt na aankoop van elk apparaat Paradyne 3600 (of zelfs voordat je het koopt) is om de handleiding te lezen. Dit moeten wij doen vanwege een paar simpele redenen:
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