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SocketModem Ô Embedded Modem MT2456SMI–22 Serial I nterface Developer’s Guide.
Copyright Multi-Tech Sys tems , Inc. MT2456SM I-22 Soc ketModem D eveloper’s Guide 2 SocketModem Ô MT2456SMI – 22 Developer’s Guide PN S000281A , Version A Copyright This public ation may not be rep roduce d, in w hole or in p ar t, withou t prior ex pressed w ritten perm ission fro m Multi- Tech Sy stems, In c.
Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 3 Contents Chapter 1 – Product D escription and Specificat ions ............................................................................. .................... 4 Product Descrip tion .
Chapter 1 – Produ ct Descrip tion and Specifi cations Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 4 Chapter 1 – P roduct Descr ipt ion and Specif icat ions The Multi-T ech SocketModem s upports analog d ata modem oper ation w i th V.
Chapter 1 – Produ ct Descrip tion and Specifi cations Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 5 Technical Specificat ions The Socke tModem me ets the follow ing specifi cations: Client-to-Server Data Rates V.
Chapter 2 - M echani cal Spe cificati ons Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 6 Chapter 2 – Mechanic al Specif icat ions Physical Dimensions Figure 2–1.
Chapter 2 - M echani cal Spe cificati ons Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 7 Pin Configurations The MT2456SMI SocketModem with a serial interfa ce use a 16-p.
Chapter 2 - M echani cal Spe cificati ons Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 8 36 –RI O Ring Indicate. –R I output ON (low ) indicates th e presence of an O N segment of a ring sig nal on the telep hone line.
Chapter 3 - Ele ctric al Character isti cs Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 9 Chapter 3 – Electr ical Characterist ics 3.3V and 5V Serial SocketM odem 3.3V DC Chara cteristic s (TA = 0°C to 70°C; VDD = 3.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 10 Chapter 4 - V .22bis Comm ands , S- R eg ister s , and R e sult Codes The V.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 11 Error Control and Data Compression Commands +ESR Select Repe at B T ransmit Break to Remot.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 12 V.22bis Generic Modem Control Commands Z Soft Reset and Rest ore Profile This comm and causes the m odem to perform a sof t reset and resto re (recall) the fa ctory default confi guration (profile).
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 13 2 Selects r eliable (error- correction) mode. The mode m will fir st attempt a LAPM connection and then a n MNP connect ion. Failure to make a re liable connectio n results in the modem hanging u p.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 14 &F Restore Factory C onfiguration (Profile) The modem l oads the factory default c onfiguration (prof ile). The factory defa ults are identi fied for each com m and and in the S-Paramete r descriptions.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 15 V.22bis DTE/DCE-Modem Interface commands The parameter s defined in thi s section co ntrol the oper ation of the inter face between the D TE/DCE and mod em.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 16 X Extended Result Codes This co mmand sel ects the subset o f the result cod e messag es used by the modem to infor m the DTE of the res ults of commands.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 17 n Value in A TXn Command Short Form Long Form 0 1 2 3 4 42 CAR RIER 75/1200 X X X X X 46 C.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 18 &R RTS/CTS Option This selec ts how the mode m controls CTS. C TS operation i s modified if hardw are flow control is sele cted (see &K command).
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 19 +IBC In Band Commands This co mmand prov ides a mechanis m by which an i n-band second ary channel may be impleme nted.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 20 Table of Supported V.80 Commands Command Hex Codes Description Supported V.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 21 V.22bis Call Control Commands DD i a l This comm and directs the modem to g o on-line, dial according t o the string ent ered and attempt to e stablish a connect ion.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 22 T Set Tone Dial Default This comm and forces DTM F dialing until the nex t P dial modifier or P command is rec e ived. T he modem will set an S-Parameter bit to indicate that all subseq uent dialing shou ld be conducted in tone mode.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 23 M Speaker Control This comm and selects w hen the speaker w ill be on or off. T he parameter v alue, if valid, i s written to S22 bits 2 and 3.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 24 V Single Line Connect Message Enabl e This co mmand enab les or disabl es the single line connect mes s age for mat as follow s: Syntax V<valu e> Defined Values <value> De cimal nu mber correspondi ng to the sele cted opt ion.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 25 *D Displa y Dela yed Numbers This co mmand cau ses the modem to send a list of the delayed numbers toget her with the delay associat ed with each.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 26 Extension Pick- up (Enabled by AT-STE=2 , AT-STE=3, A T-STE=6, or AT-STE=7): Case 1: Modem.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 27 V.22bis Modulation Control Commands +MS Modulation Selecti on This ex tended-format compo und parameter contro ls the mann er of operation of the modulation ca pabilit ies in the modem.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 28 %E Enable/Di sable Line Q uality Monitor and Auto-Retrain Controls w hether or not the mo dem will automatically m onitor the line qual ity and request a re train (%E1).
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 29 V.22bis Erro r Control an d Data Compression Commands +ESR Selective Repeat This ex tended-format numeri c parameter controls the us e of the sel ective repeat (SREJ) option in V.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 30 K Break Control Controls the re sponse of the m odem to a br eak received fr om the DT E or the remote modem or the B comma nd. The parameter v alue, if valid, is written t o S40 bits 3, 4, and 5.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 31 V.22bis Synchronous Access Mode Commands Three co mmands su pport Synchronou s Access Mode: +ES enables an d disables Synchr onous Acce ss Mode i n the client or centr al site mode m.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 32 +ITF Transmit Flow Control T hresholds The +IT F command det ermines the flow co ntrol thresholds use d by the modem for transmit data fr om the DTE.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 33 V.22bis FastConnect Command $F Fast Connect Control This co mmand all ows configuring of the client mode m to co nnect to a centr al site mo dem that support s non-stand ard V.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 34 V.22bis Line Side Device Commands -TTE Threshold Adjustments for Telephony Extension This .
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 35 V.22bis S- Paramet e rs The S-Paramet ers are sum m ariz ed in the S-Parameter Table alon g with their defaul t values which may be loaded at any time by using the Z command.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 36 Summary of S-Parameter Defa ults Register Function Range/Units Default* S0 Rings to Aut o-.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 37 S-PARAMETER DE FINITIONS S0 - Number of Rings to A uto-Answer S0 sets the nu mber of the rings required before the modem automat ically answ ers a call.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 38 S8 - Pause Time For Dia l Delay S8 sets the ti me, in second s, that the mod em must pa use when the “,” di al modifier is encountere d in the dial str ing.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 39 S16 - Test Mode Bit Mapped Options Status S16 indicate s the test in progres s status. Default: 0 Bit 0 Local an alog loopbac k. 0 = Disabled.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 40 S22 - Speaker/Re sults Bit Mapped Options Stat us S22 indicate s the status of command options. Default: 11 7 (75h) (01110101b) Bits 0-1 Spe aker volu me (Ln).
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 41 S27 - Bit Mapp ed Options Status S27 indicate s the status of command options. Default: 73 ( 49h) (01001001b) Bits 0,1,3 Synchronous/ asynchronous se lection (&Mn/&Qn).
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 42 S36 - LAPM Fail ure Control Default: 7 (0 0000111b) Bits 0-2 T his value indicates what should happen u pon a LAPM failure. These fal l back options are initiat ed immediately upon connectio n if S48=128.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 43 S41 - General Bit Mappe d Options Status S41 indicate s the status of command options. Default: 13 (C 3h) (00001101b) Bits 0-1 Co mpression sel ection ( %Cn).
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 44 S91 – PSTN Transmi t Attenuation Level S91 sets tr ansmit att enuation level from 0 to 15 dBm for the PSTN mod e, resulting in a transmit level fr om 0 to -15 dBm .
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 45 V.22bis Result Codes The modem re sponds to comma nds from the DT E and to activity on th e line by signal ing to the DTE in the form of result c odes.
Chapter 4 - V.22bi s Command s Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 46 Code Message Meani ng 16 CONN ECT 19200 The mode m has connect ed to th e line, t he DTE spe ed is 19200 bps a nd DTE speed reportin g is enabled.
Appendix A – Te st/Demo Card Inform ation Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 47 Appendix A – T est/De mo Card Inf orm at ion Block Diagram S peaker DS1 Modem Module Power Supply Power Switch Power Connector RJ-1 1 Connector DB-25 RS-232 V olume Control Tip/Ring Fuse Transceiver (RS-232) Figure A–1.
Append ix B – Pr oduct Approval s, Regu latory D esign Co nsidera tions, Co mplianc e Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 48 Appendix B - P roduct Appro v al .
Append ix B – Pr oduct Approval s, Regu latory D esign Co nsidera tions, Co mplianc e Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 49 Regulatory Design Considerations This se ction dis cusses hardw are consideration s, safety, an d Telecom la beling r equirement s.
Append ix B – Pr oduct Approval s, Regu latory D esign Co nsidera tions, Co mplianc e Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 50 Recommended Ferrite (SMT) Manufac.
Append ix B – Pr oduct Approval s, Regu latory D esign Co nsidera tions, Co mplianc e Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 51 SocketModem Placement This figure i llustrates where t o place the SocketM odem on a typic al applica tion.
Append ix B – Pr oduct Approval s, Regu latory D esign Co nsidera tions, Co mplianc e Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 52 Compliance Multi-Tech Syste ms, Inc.
Append ix B – Pr oduct Approval s, Regu latory D esign Co nsidera tions, Co mplianc e Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 53 8. No repairs ar e to be made by y ou. Repairs are to b e made only by M ulti-Tech Systems or i ts licensees.
Append ix B – Pr oduct Approval s, Regu latory D esign Co nsidera tions, Co mplianc e Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 54 Labeling Continuity and Changes The labeling content and for mat requirement s in effect when a product was approv ed shall be effective f or the life of the product.
Append ix B – Pr oduct Approval s, Regu latory D esign Co nsidera tions, Co mplianc e Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 55 (ii) For a new model that is regi.
Append ix B – Pr oduct Approval s, Regu latory D esign Co nsidera tions, Co mplianc e Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 56 7. Some para meters requir ed for comp liance w ith Teleco m’s Telepermit r equirements are dependent on th e equipment (PC ) asso ciated w ith this dev ice.
Index Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 57 Inde x $F – Fas tConne ct C ontrol , 33 %L - Report L ine Signal Lev el , 24 %Q - Report L ine Signal Quality , 2.
Index Multi-Tech Sys tems, Inc. MT2456SM I-22 Soc ketModem D e veloper ’s Guide 58 –STE= - Set Te lephony Extension , 25 Sync hronous Ac cess Mode Com mands , 31 T - Set T one Dial Def ault , 22 Table of Result Codes , 16 Table of Supported V.
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