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User Manual Paragon II.
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User Manual Paragon II Copyright © 2003 Raritan Computer, Inc. PII-0A-E December 2003 255-30-6000 Raritan Computer Inc. 400 Cottontail Lane Somerset, NJ 08873 USA Tel. 1-732-764-8886 Fax. 1-732-764-8 887 E-mail: sales@ raritan.com http://www.raritan.
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FCC Infor mation This equipment has been tested and foun d to comply with the limits for a Class A digital device, pursuant to Part 15 of t he FCC Rules. These limi ts are designed to provide reas onable prot ection against ha rmful interference in a commercial installation .
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T ABLE OF C ONTENTS i Table of Contents Chapter 1: In troduction .................................................................. 1 Paragon II Overview..................................................................................................
ii P ARAGON II U SER M ANUAL Illegal Configuration .......................................................................................................... ....... 62 Loop-Back Configuration....................................................... ...
T ABLE OF F IGURES iii Table of Figures Figure 1 Paragon II Base Units ................................................................................................. .......2 Figure 2 P2-UMT832, P2-UST, and P2CIM-PS2 ..................... .........
iv P ARAGON II U SER M ANUAL Figure 47 Stacking - Single Base Co nfig uration wi th P2-UMT832M and P2-UMT 832S................ 55 Figure 48 Stacking - Single Base Co nfig uration wi th P2-UMT832M and P2-UMT 832S................ 55 Figure 49 Stacking - Single Base Co nfig uration wi th P2-UMT832M and P2-UMT 832S.
C HAPTER 1: I NTRODUCTION 1 Chapter 1: Introduction Congratulations on you r purchase of Raritan’s Par agon II! The Paragon family is abou t breaking away fro m the traditional, exp ensive model of server manag ement – one server, one dedicated monitor, one dedicated keyboard.
2 P ARAGON II U SER M ANUAL Product Photos Figure 1 Paragon II Base Units Figure 2 P2-UMT832, P2-UST, and P2CI M-PS2.
C HAPTER 1: I NTRODUCTION 3 Product Features • 2U design s upports 16 u sers, 64 ser vers (m odel P2-UMT 1664M) • 1U design su pports 8 users, 32 servers (model P2- UMT832M) • 1U design su pport.
4 P ARAGON II U SER M ANUAL Package Contents Each Paragon Base Unit (P2-UMT242, P2-UMT442, P2-UMT832 M, or P2-UMT1664M) ships with: • (1) Base Unit • (2) 20-ft. (6. 1-m) CAT5 test cables • (1) Pair of rac kmount b rackets and associat ed screws • (1) 6-ft.
C HAPTER 2: I NSTALLATION 5 Chapter 2: Installation Important! The Paragon and all devices you want to attach to it must be unplugged and powered OFF prior to installation. Basic Installation 1. Connect power cord to the Main Switching Unit. Optional Stacking Support: − Connect power cord to a Stacking Unit.
6 P ARAGON II U SER M ANUAL 1 3 4 5 6 7 8 2 O p tiona l Figure 3 Installation Diagram.
C HAPTER 2: I NSTALLATION 7 Initial Administrative Testing To verify that an attache d server can be vi e wed and co ntrolled th rough the Pa ragon sys tem: 1. When you firs t power ON the Pa ragon Base Unit, an att ached User Station, and the User Station’s attached monitor; a Login Menu will be displayed on the monitor.
8 P ARAGON II U SER M ANUAL A video-gain ad justment is available to focus th e video image, which can be especially useful if you are using an LCD flat-panel m onitor. T o make this a djustment, act ivate the OS UI (if y ou have not done so already) by rapid ly pressing the keyboard’s [ Scroll Lock ] key twice.
C HAPTER 2: I NSTALLATION 9 2. Line 2 : User port status m essage: “A/N User (1, 2, 3 … ) → None” User port status displays a scrolling status of all us er ports, one user p ort per second. The User’s active channel, 1 t hrough 256 , is dis played afte r the user port num ber.
10 P ARAGON II U SER M ANUAL 1. Display Ver./ SN (Firmware Version and Serial Number): Di spla ys current version of firmware and unit’s serial number. Firmware: 2C1 SN: CPB80347 Figure 11 Display Ver. and SN 2. Test User UST1 (User Station): Us ed by adm inistrator to check if user stati ons (UST1s) are functionin g properl y.
C HAPTER 2: I NSTALLATION 11 7. Re-Confi gure : Paragon II will automatically configure the system as computers or devices are added or removed. However, the sy stem administ rator can use this f unction to scan an d re-configure the system manually. When complete, it will return to normal display.
12 P ARAGON II U SER M ANUAL Initial Configuration Note : This section includes full instructions for ho w to install single Base Units, ca scades of multiple base units, or stacking switches. Follow the simplified procedure previously outlined in Basic Installat ion to install a simple P aragon system with a single Base Unit.
C HAPTER 2: I NSTALLATION 13 Installing a Paragon System with a Single Base Unit If installing a single Paragon Base Unit, keep in mi nd the maximum numbers of user stations and server CPUs you can co.
14 P ARAGON II U SER M ANUAL 3. Initially configure the User Station. a. The Login Menu shoul d be display ed on th e User Station’s attached monitor.
C HAPTER 2: I NSTALLATION 15 5. Connect a P2CIM-PS2 and its server CPU. a. Connect the cable strands of an appropriate P2 CIM-PS 2 to the desire d ports on a server CPU: i. P2CIM-PS2 (IBM PS/2 c ompatible CPUs): Pl ug the HD15 strand into the CPU’s HD15 VG A video port.
16 P ARAGON II U SER M ANUAL c. Th e Channel Configuration menu will appear. Use the up- and down-arrow keys to move the yellow highlight to the Name field for the channel port number where you installed the CPU and press the [ Enter ] key. T he highli ght should t urn light blue.
C HAPTER 2: I NSTALLATION 17 Installing a Cascaded Paragon System Paragon II ’s channel p ort capa city can be e xpanded by instal ling a casca de of B ase Units. In a “tw o-tiered” cascaded system, one or more subsi diary Base Units ar e connected to the chan nel ports of a m aster Base Unit.
18 P ARAGON II U SER M ANUAL 6. Configure the channel por ts in your system. (Check the [ Scroll Lock ] LED on one of your user-s tation keyboards. If it is blinking, t he Paragon is ready to accept hotkey c ommands from that user station. Hotkey comm ands can be used wit h the OSUI t o login, sel ect servers, or administ er the system .
C HAPTER 2: I NSTALLATION 19 d. The Channel Configur ation menu will app ear. Use the up- and down -arrow keys and [ PageUp ] and [ PageDo wn ] keys to approac h channel ports to wh ich subsidiary Base Units are connected.
20 P ARAGON II U SER M ANUAL press the [ Enter ] key, then a channel port for a CPU a ttached to the second-tier Base Unit and press the [ Enter ] key. If you can properly access and oper ate the c hosen CPU, the second-tier Base Unit is properly installed.
C HAPTER 3: O PERATIO N – U SER F UNCTIONS 21 Chapter 3: Operation – User Functions User functions for confi guration an d operation of your Pa ragon II syst em are proces sed thro ugh the On- Screen User Interface ( OSUI).
22 P ARAGON II U SER M ANUAL 3. The Selection Menu will appear. To view oth er menus, use the function keys as described in th e Help Menu section later in this chapter. Figure 28 Selection Menu for a P2-UMT832M Note : To Log out of the P aragon II system, press the function key [ F9 ] while the OSUI is on-screen.
C HAPTER 3: O PERATIO N – U SER F UNCTIONS 23 Selecting a Server Immediatel y following user lo gin, the Selection Me nu appears. Users who are already logged in can activate the Selecti on Menu by pressin g the hotkey (the factory defaul t is [ Scroll Lock ]) twice in quick succession, then pressing func tion key [ F2 ].
24 P ARAGON II U SER M ANUAL Figure 30 Selection Menu in order by Name The Selection M enu displa ys up to ei ght channel ports pe r page; t otal num ber of pages appea rs in the upper right-hand corner, for example “ Page 2/5 ” i ndicates that y ou are on the second of f ive pages.
C HAPTER 3: O PERATIO N – U SER F UNCTIONS 25 Once you switch to a differ ent channel port, you can continu e switching by pressing the hotkey (factory default is [ Scroll Lo ck ]) twice rapidly to activate the Selection Menu.
26 P ARAGON II U SER M ANUAL User Customization When the OSUI is active, inv oke the User Profile Menu by pressing function key [ F4 ]. This menu di splays Paragon II’s configuratio n and all ows you to set preferre d operatin g param eters for indi vidual user accounts.
C HAPTER 3: O PERATIO N – U SER F UNCTIONS 27 User Profile Parameters and How to Change Settings • Scan Mode : Indi cates how Para gon II det ermines t he length o f time to pause at each c hannel p ort during aut oscanning .
28 P ARAGON II U SER M ANUAL You can change, delete, or reinstate your pass word (if “Allo w Blank Password” is set to “ Yes ”) while the User Profile Menu is on -screen by pressing [ P ] . Type your ol d password at t he first prom pt. Type a new password up t o eight charact ers long at the ne xt prompt, an d press the [ Enter ] key.
C HAPTER 3: O PERATIO N – U SER F UNCTIONS 29 Keyboard-Controlled OSUI Functions Use the following function keys to access the Paragon’s OSUI functions: P RESS … W HEN YOU WANT TO … [F1] View .
30 P ARAGON II U SER M ANUAL Information Menu When the OSUI is open, activate the Information Menu by pressing function key [ F8 ]. This menu displays the “vital statistics” of the User Station th.
C HAPTER 4: O PERATION – A DMINISTRATOR F UNCTIONS 31 Chapter 4: Operation – Administrator Functions The Administration Menu Administrat ors can use the A dministrat ion Menu to set se curity clas.
32 P ARAGON II U SER M ANUAL Guidelines for System Configuration • Only one use r shoul d attem pt to modi fy/update t he System Administ ration Me nu at one ti me (especially the User Configuration an d Channel Configuration op tions). • Z-CIMs should be ad ded one at a time to a Z-CIM chain .
C HAPTER 4: O PERATION – A DMINISTRATOR F UNCTIONS 33 zeroes if necessary, type in a two- digit number of minutes from 01 to 99, or use the up- and down- arrow keys to increment and decr ement the current value by 1 respectively. The default setting is 05 .
34 P ARAGON II U SER M ANUAL User Configuration As administrat or, use the User Co nfiguration M enu to add, delet e, and edit user names and secu rity rights, and to display the current c onnection status for each user. Figure 36 The “left end” of the User Configuration Menu This menu displays one user’s inform ation in each row.
C HAPTER 4: O PERATION – A DMINISTRATOR F UNCTIONS 35 Press the [ Tab ] key or the rig ht-arrow key to move to the “ri ght end” of the m enu and displ ay users’ connection information: The Connectio n column displays which channel po rt (if any) each active user is currently connected to.
36 P ARAGON II U SER M ANUAL Channel Configuration As administrator, use the Channel Configuration Menu to edit or initializ e a P2CIM-PS2. You can chang e the device name, indi vidual scan rate, device type, and group IDs ass ociated with each server or device.
C HAPTER 4: O PERATION – A DMINISTRATOR F UNCTIONS 37 While the cursor is in the Device column, press [ Tab ] or the ri ght-arro w key to move t o the “right e nd” of this menu and display de vices’ grou p inform ation: The Grou p columns displ ay which gr oups (if a ny) the device has been assi gned to.
38 P ARAGON II U SER M ANUAL User Station Profile As administrator, select Option 4 from the Administration Menu to activate the User Station Profile to set the global key board t ype and vi deo delay . Keyboard Type The Paragon’s OSUI supp orts three types of keyboar d mapping s: Select either “E nglish” – t he default is U.
C HAPTER 4: O PERATION – A DMINISTRATOR F UNCTIONS 39 Group Settings (Access Rights) To assign access rights to use rs and security levels to server CPUs in a Paragon system , assign users to user groups with defined rights a nd CPUs to channel port groups with de fined accessibility.
40 P ARAGON II U SER M ANUAL T HESE USER G ROUPS ... ... CAN ACCESS THESE CHANN EL PORT GROUPS : 00 00 through 99 (all CPU s) 0x (01 through 09 ) 00, 0x, and x0 through x9 For example: 01 can access 00, 01, and 10 through 19; 02 can access 00, 02, and 20 through 29, etc.
C HAPTER 4: O PERATION – A DMINISTRATOR F UNCTIONS 41 Network Settings Configure the Paragon II’s network se ttings from the OSUI by pressing [ F5 ] to activate the Administration Menu. Select option 5, Network Settings to adjust the network settings of t he device.
42 P ARAGON II U SER M ANUAL Autoscanning and Autoskipping As administrato r, you can press [ F6 ] to turn autoscanni ng on a nd off. Whe n autosc anning is turned on, Paragon II switches sequentially.
C HAPTER 4: O PERATION – A DMINISTRATOR F UNCTIONS 43 Power Management An admini strator can co ntrol powe r to connected devi ces directly via t he Paragon II OSUI.
44 P ARAGON II U SER M ANUAL Controlling Power to an Outlet The addition of a power strip to the Paragon II system allows administrators to cont rol the power to targets in two ways: Controlling power.
C HAPTER 5: P ARAGON II AND Z-CIM 45 Chapter 5: Paragon II and Z-CIM If you have a l ocal PC CPU that you wa nt only the user(s) at a certain user station t o be able to access, but you want that user.
46 P ARAGON II U SER M ANUAL Connecting Z-CIMs as Tiers The following diagram shows the final setup when connecting Z-Series Z42 00U Z-CIMs as a tier: Figure 42 Connecting a Z-CIM as a Tier to Pa ragon II Important: Z-Series installation requires that each computer be assigned a channel name as it is added to the Z-CIM chain.
C HAPTER 5: P ARAGON II AND Z-CIM 47 c. Place the Z-CIM Terminator in the Z-CIM’s UTP IN port. d. Power ON com puter. e. Optional : Connect a local user cons ole to the UKVMSC Z-CIM. Perform Channel Configuration: 1. At a User St ation Logi n Menu, type admin in the User Name field and press [ Enter ].
48 P ARAGON II U SER M ANUAL Attach Z-CIM to Computer to be Added: For UKVMSPD Z-CI M: 1. Connect the 6-pi n mini-DIN keyboard and mouse and H D15 video c onnectors on t he UKVMSP D Z- CIM to computer’s keybo ard, mouse, and video ports. For UKVMSC Z -CIM with loc al port: 1.
C HAPTER 6: IBM X 330 49 Chapter 6: IBM x330 Paragon II unit firmware versions 1P0 (UMT2161) , 2C2 (UMT242, UMT442 , and UMT8), or 3A2 (UMT1664) and User Station (UST1) firmware 4L2 or higher supports.
50 P ARAGON II U SER M ANUAL Install an IBM x33 0 Rack of Servers as a Tier to Parago n II: 1. Set up Paragon II followi ng Basic I nstallation i nstructions, but reserve one chan nel port f or each rac k of IBM x33 0 servers t o be connecte d. 2. Connect a Category 5e UTP cab le to the reserved ch annel port on the b ack of the Paragon II un it.
C HAPTER 7: C ONFIGURATIONS 51 Chapter 7: Configurations When implementing co mplex tiered and stacked archit ectures for a Paragon system, there are im portant guidelines describing the le gal and il.
52 P ARAGON II U SER M ANUAL Tiered Configurations Standard Tiering Configurations Single Base Configuration Definition of Single Base configuration : • Only UMT matrix switches can serve as base units. • The base unit must always be the latest released version, both in hardware and firmware.
C HAPTER 7: C ONFIGURATIONS 53 Multiple Base Configuration Definition of Multiple Base configuration: • Two or more UMT Matrix Switches serve as base units. • The base unit must always be the latest released version, both in hardware and firmware.
54 P ARAGON II U SER M ANUAL Stacked Configurations Definition of stac king configuration: • The P2-UMT Stacking Swit ch, a new switch device required for stackin g configurati ons, expan ds the number of avai lable chan nel ports in a single switc h.
C HAPTER 7: C ONFIGURATIONS 55 Standard Stacking Configurations Single Base with Stacking Example A: No n-blocked Syst em – P2-UM T1664M Standard configuration – any user can access any channel port i n the system.
56 P ARAGON II U SER M ANUAL Example D: P2-UMT832M Stacked and Tie red Standard configuration – any user can access any channel port i n the system. Figure 49 Stacking - Single Base Configuration wi.
C HAPTER 7: C ONFIGURATIONS 57 Example G: Il legal C onfigura tion Figure 52 Stacking - Single Base Configuration with P2-UMT1664M and P2-UMT832 S Example H: Il legal C onfigura tion Figure 53 Stackin.
58 P ARAGON II U SER M ANUAL Non-Standard Tier Configuration Guidelines for Existing Firmware Versions • Non-Standard tier confi gurations a re those con figurations supported by Parag on II, but require special procedures in order to funct ion prope rly.
C HAPTER 7: C ONFIGURATIONS 59 Triangle Configuration The following procedure must be followed to ensure this configurati on functions pr operly: − After re-connection, all UMT Matrix Switches must undergo a FUNC reset to clear the switch database. This procedure sh ould be pe rformed sta rting from the third tier device down t o the base unit.
60 P ARAGON II U SER M ANUAL Diamond Configuration The following procedure must be followed to ensure this configurati on functions pr operly: − After re-connection, all UMT Matrix Switches shou ld undergo a FUNC reset to clear the switch database. This procedure sh ould be pe rformed sta rting from the third tier device down t o the base unit.
C HAPTER 7: C ONFIGURATIONS 61 Redundant Configuration The procedure outlined below mus t be followed to ensure this configurati on functions properl y: − After installation, all UMT Matrix Switches should undergo a FUNC reset to clear th e switch database.
62 P ARAGON II U SER M ANUAL In order to m ake a redundant configur ation system operate more e fficient, the following connection scheme between tiers is recommended: − Assume there are two UMT Bas.
A PPENDIX A: S PECIFICATIONS 63 Appendix A: Specifications P ARAGON II U NIT D ESCRIPTION D IMENSIONS W EIGHT P OWER P2-UMT1664M 16 users x 64 server ports, expansion slot, stacking port, network port 11.41” (W) x 17.32” (D ) x 1.75” (H) 290mm (W) x 440m m (D) x 44mm (H) 12.
64 P ARAGON II U SER M ANUAL CAT5 Cable Guidelines Use only strai ght-thro ugh-pinne d four-pair (eight-wire ) Category 5 unshi elded twiste d pair (UTP) ca bles, terminated wit h standa rd RJ-45 pl ugs, for t he CAT5 cabl ing links i n your Para gon system .
A PPENDIX B: U SE R S TATION D IRECT M ODE 65 Appendix B: User Station Direct Mode A Paragon User Station set to Direct Mode can be dir ectly connected to a Paragon CIM, either tem porarily for emergency “cras h cart” access or pe rmanently for non-switched extension purposes, withou t having to go through a Base Unit.
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A PPENDIX C: C ONFIGURATION AND C OMPATIBILITY 67 Appendix C: Configuration and Compatibility Configuration Matrix As a general rule, the very latest hardware a nd firmware sh ould reside o n the lowe.
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A PPENDIX D: P ARAGON II R ACK M OUNT 69 Appendix D: Parago n II Rack Mount Paragon II Use r Stations and most Base Uni ts can be mounted i n 1U (1.75", 4 .4 cm) of vert ical space in a standard 19" e quipm ent rack; P2-UMT1 664M Base Unit s can be mounte d in 2U ( 3.
70 P ARAGON II U SER M ANUAL Rear Mount 1. Secure the cable-support bar to th e front end of the side brackets, nea r the side brackets’ “ears,” using two of the i ncluded screws.
A PPENDIX E: U SI NG AUATC FOR RS-232 A CCESS 71 Appendix E: Using AU ATC for RS-232 Access Introduction to the AUATC To use your Paragon II system to access a CPU or othe r device through an RS-232 port, attach one of our RS-232 serial CIMs (produ ct code AUA TC) to the device ’s serial port as described in the first section of this Appendi x.
72 P ARAGON II U SER M ANUAL Operating the AUATC Screen Layout The AUATC produces eight -color vide o at 800 x 600 resolut ion, whic h can accomm odate 32 lines of 80 text characters each. A typical ASCII term inal uses 24 lines, so t he AUATC uses the eight extra lines to provide system-status and help information.
A PPENDIX E: U SI NG AUATC FOR RS-232 A CCESS 73 On-Line Mode When you operate the AUATC in On-Li ne Mode, the m ain screen area displays you r interactions with the ASCII device, as if it we re the screen of an ASCII te rminal.
74 P ARAGON II U SER M ANUAL Buffer Edit Mode The AUATC stores the most recent eigh t pages of data from the attached ASCII device in a circular buffer.
A PPENDIX E: U SI NG AUATC FOR RS-232 A CCESS 75 Configuring the AUATC Press [ Alt ] + [ F2 ] to activate the Setup Screen, wher e you can select your desired serial-communica tion parameters (baud rate, etc.
76 P ARAGON II U SER M ANUAL To program any of your keyb oard’s twelve function key s with comm ands or data i tems you fre quently ha ve to send the device, activate t he Set Up Programmable Keys screen by pressing [ Alt ] + [ F3 ].
A PPENDIX E: U SI NG AUATC FOR RS-232 A CCESS 77 Troubleshooting the AUATC If you do not get a device prompt: 1. If the AUATC’s screen is displayed on your monito r with the top and bottom help windows, make sure that it indicates On Line status. If not, press [ Esc ] to return to On-Line Mode.
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A PPENDIX F: E MULA TING S UN K EYS W ITH A PS/2 K EYBOARD 79 Appendix F: Emulating Sun Keys with a PS/2 Keyboard We recommend that y ou use a Sun keyboa rd and mouse at your user stat ions if there are any Sun CPUs in your Paragon system.
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A PPENDIX G: T ROUBLESHOOTING 81 Appendix G: Troubleshooting S YMPTOM : P ROBABLE C AUSE : No Power. Loose Power Cord. Power switch is off. Paragon II Matrix Switch or User Station (P2-US T) surge protection invoked duri ng a power recycling pr ocess.
82 P ARAGON II U SER M ANUAL Multi-Tier Installation In a multi-tier configuration, the order of po wering ON is critical to proper function. • Last tier switches must be powered ON before the intermediate level of tier • Intermedia te tier switches m ust be powered ON befo re the base Paragon II unit can be powered ON.
A PPENDIX H: FAQ 83 Appendix H: FAQ S UBJECT : Q UESTION : A NSWER : What’s Differ ent between Paragon and Parago n II What is the primary difference between Paragon and Paragon II? Paragon II is the next generati on of KVM switch.
84 P ARAGON II U SER M ANUAL S UBJECT : Q UESTION : A NSWER : Can I restore my saved Paragon Overview files on Para gon II ? Yes, Paragon Manage r can read Paragon Over view files and restore this information into a Paragon II swit ch.
A PPENDIX H: FAQ 85 S UBJECT : Q UESTION : A NSWER : Cabling What UTP cable does Raritan recommend f or use with Para gon II? Paragon II will work with any Cat5, Cat5e, Cat6, or Cat 7 cable. Paragon II use s a very sophisticated circuit to automatically adjust signal to ensure the highest quality video and enhance the use r experience.
86 P ARAGON II U SER M ANUAL 255-30-6000.
Een belangrijk punt na aankoop van elk apparaat Raritan Computer II (of zelfs voordat je het koopt) is om de handleiding te lezen. Dit moeten wij doen vanwege een paar simpele redenen:
Als u nog geen Raritan Computer II heb gekocht dan nu is een goed moment om kennis te maken met de basisgegevens van het product. Eerst kijk dan naar de eerste pagina\'s van de handleiding, die je hierboven vindt. Je moet daar de belangrijkste technische gegevens Raritan Computer II vinden. Op dit manier kan je controleren of het apparaat aan jouw behoeften voldoet. Op de volgende pagina's van de handleiding Raritan Computer II leer je over alle kenmerken van het product en krijg je informatie over de werking. De informatie die je over Raritan Computer II krijgt, zal je zeker helpen om een besluit over de aankoop te nemen.
In een situatie waarin je al een beziter van Raritan Computer II bent, maar toch heb je de instructies niet gelezen, moet je het doen voor de hierboven beschreven redenen. Je zult dan weten of je goed de alle beschikbare functies heb gebruikt, en of je fouten heb gemaakt die het leven van de Raritan Computer II kunnen verkorten.
Maar de belangrijkste taak van de handleiding is om de gebruiker bij het oplossen van problemen te helpen met Raritan Computer II . Bijna altijd, zal je daar het vinden Troubleshooting met de meest voorkomende storingen en defecten #MANUAl# samen met de instructies over hun opplosinge. Zelfs als je zelf niet kan om het probleem op te lossen, zal de instructie je de weg wijzen naar verdere andere procedure, bijv. door contact met de klantenservice of het dichtstbijzijnde servicecentrum.
