Grant/Deny RDL Request &T4, &T5 | Black Box 3600 MODEM manual

Test Mode Operation

Grant/Deny RDL Request &T4, &T5

Local operators can deny a request from the remote modem for remote digital loopback.

To allow your modem to be placed in RDL by a remote operator, enter

AT&T4

To prevent your modem from entering RDL, enter

AT&T5

Remote Digital Loopback &T6

The initiating modem signals the remote modem to go to Digital Loopback. The remote modem receives and then retransmits data back to the local modem. If Digital Bilateral Loopback is enabled on the remote modem, the remote DTE is looped back to itself (Figure 7-4).

Figure 7-4. Remote Digital Loopback with Digital Bilateral Loop Enabled at the Remote Site

After making the data connection, enter the escape sequence to return to command mode. Entering &T6 places the remote modem in digital loopback provided the remote operator has entered the &T4 command to allow an RL request. Enter a test message and verify the message is being looped back to your terminal screen. If the message is incorrect, use the analog loopback tests on both modems to isolate the problem. If both modems run analog loopback without errors, the problem could be with the phone line.

7-6	Modem 3600

Image 120

Black Box 3600 MODEM manual Grant/Deny RDL Request &T4, &T5, Remote Digital Loopback &T6

Contents

3600 Trademarks $2334253/426 #$%&*+ #$%&,+ $$$ $$$$ $&% $$% $%%-% $&% % %&$ $ !+ #**# # 3! #41% #**# # 3! #41%&, +2 #4!# 3C $ 35 F + *&*A1 $ @ $A = 01BB Page $%% $ +,-*./0 1 **-*2**,3/0 Page Page Page Page #26 Page Page Page 555,5,65E##E%E% % Page #5 S7-# Chapter Introduction Shelf-Mount Units Features Data Mode Fax Mode SoftwareCommunications Software Class 1 Fax Communications Software Internet Browser Description FunctionalPhysical Rear Panel 115 Vac Model Modem 3600 Card Card Version of the Modem Chapter Installation Mounting Accessories Electrical Installation AC Power ConnectionDC Power Connection DTE Connection Digital Interface Signals Pin Signal Description s Pin 232D Signal Description Pin Signal Descriptions DCE Telephone Line Connection Dial Mode Pstn Connection Dial jack Dial-up Connection 115 Vac Model Leased Line Connection TELSET/LEASED Line Jack Leased Line Connection 115 Vac Model Shelf-Mount MD1000C Installation MD1000C Connections Power-Up Chapter Getting StartedOption Selection Autodialing from a Terminal with the AT Commands Placing a CallDialing with a Standard Telephone Autodialing from Front Panel Answering a Call Ending a Call Reasons for Call Termination Reasons for Call Terminatio n Condition Reasons for Call Termination Condition Page Chapter Front Panel Operation LED Descriptions LCD Menus LCD Menu Operation LCD Menu Option Selectio n Reg LCD Menu Option Selection Main Menu Submenu Submenu Item Option Com Reg Submenu Main Menu Option Com Reg Lease line only † Dial line only Modify Change DTE Speed DTE=DCE Modify Change DTE Dial Method Async Modify Change DTE RTS/CTS Delay Password of 0000 disables front panel security Front Panel Security Front Panel Operation Chapter AT Commands Command CategoriesOperation Modes Sending Commands to the Modem Offline Command ModeOnline Command Mode Creating a Command Statement AT Autobaud Guidelines for Creating Command Statements Command Statement Buffer Repeating a Command aMonitor Display Backspace Key Response Commands Numbered CommandsGroup Commands Command Operation Digit / Word SelectionResponse Displays Q Negotiation Displays W Call Progress / Connect Speed Messages Command Code Set Number Operation Number Code Application *RC Response Number Codes / Messages Code Message Meaning DTE rate 31200 bps Connect 300/V42 Connect 300/MNP5 Dial Commands Dialing D Tone Dialing T Pulse Dialing PInsert Long Pause Wait for Second Dial Tone W Switching to Answer Mode after Dialing R Remaining in Command ModeHook Flash Wait for 5 Seconds of Silence @ Switching from Voice to Data Dialing a Stored Telephone Number SnAutodial Number Location *AUn Voice Calls AT Command Answer a Manual AnswerAutoanswer S0 Caller ID *ID Distinctive Ring *DR Caller ID Message s Modem sends this message Terminal Interface Commands Data Carrier Detect &C Data Set Ready &S Data Terminal Ready &D Serial Port Ring Indicator Pin 22 \R Request to Send / Clear to Send &R General Commands Changing from Data Mode to Command Mode +++DTE Controlled Fallback Rate Pin 23 *FB Local Character Echo E Online Character Echo F Hanging Up H, H1Fast Disconnect H2, H3 Speaker Volume L Eprom CheckSpeaker Control M Asynchronous / Synchronous Mode Selection &M Return Online OLong Space Disconnect Y Bis Guard Tones &G Make / Break Dial Pulse Ratio &P Synchronous Transmit Clock Source &X Rate Selection Thresholds *THAsymmetric Bit Rates *AS Modulation *MM Maximum DCE Speed %B Minimum DCE Speed %L Auto Retrain %E Automatic Rate Adaption %R Manual Rate Adaption *RR Product Revision Level %V Online Quick Reference $H Product Serial Number $VTalk / Data *DA Fast Train *FT Disable AT Command Set *NT Wire OperationPrivate Line Operation Dial Line Transmit Level *TDn Wire Leased Line Operation Wire Dial-up Operation Dial Backup Dial Backup *DB Return to Leased Line from Dial Backup *LBManual Dial Backup *LD Dial / Leased Line &L Configuration Commands Configuration ProfilesActive Profile Stored Profile Storing a Configuration &W Powerup Option Set &Y Reset to Stored Configuration Z Load Factory Options &Fn View Configuration Profiles/Received Signal Options &V Storing a Telephone Command Line &Zx=n, *CNx,n, *ND Remote Configuration Soft Download Password %P1, $YRetaining / Restoring Options *RO Remote Configuration Security Remote Security Code %P= Entering Remote Configuration %T=, &T Enabling/Disabling Remote Configuration *RA Remote Configuration DTE Speed *RB Remote Configuration Format *RF Remote Configuration Saving or Discarding Options *RQ Page Ccitt V.42 bis Error Control Protocol Reliable ModeChapter Protocols Auto-Reliable Mode Normal ModeConstant Speed Interface Data Compression Direct Mode Protocol CommandsFlow Control Disconnect Buffer Delay %D Optional Detection Phase \M Serial Port DTE Constant Speed \J Operating Mode \N Auto-Reliable Fallback Character %An Serial Port Flow Control \Q XON/XOFF Pass Through \X Data Link Flow Control \G Break Control \Kn Inactivity Timer \T Maximum Reliable Block Size \A Transmit Break / Set Break Length \BSet Auto-Reliable Buffer \C 42bis Data Compression %C Chapter Test Mode Operation Diagnostic Test s Offline OnlineTest Categories Test Commands Operation Terminating a Test in Progress &T Testing the Local Modem Local Analog Loopback &T1 Local Analog Loopback with Self Test &T8 Local Analog with Test Pattern Testing the Remote Modem Local Digital Loopback &T3 Grant/Deny RDL Request &T4, &T5 Remote Digital Loopback &T6 Remote Digital Loopback with Self Test &T7 Test Pattern %T DTE Controlled Remote Digital Loopback Pin 21 *RD DTE Controlled Local Analog Loopback Pin 18 *LA Chapter Security Autocallback Security Low Security Operation Operating without Low SecurityOperating with Low Security Remote Operation Low Security Commands PasswordsLocal Operation LCD Indication of Security High Security Security Levels Superuser High Security Commands Default PasswordsEnabling High Security $EH=pw Disabling High Security $D Setting Passwords $Pn=pw$pw Set Security Levels $Ln=mSet User Callback Number $Cn=m Extended Features $W Display Extended Feature Status $W?Display / Reset Illegal Access Attempt Counters $M, $Mn, $M Factory Reset $F=pw$pw Removing a User $RnSecurity Status $E? Display User Status $S? Local Logon Command $n=pw Local Logoff Command $$Remote Logon Procedure $n=pw Verify User Information $In, $IBn Security Chapter Fax Operation Fax Operation Fax Defaults Modem InitializationFax Autoanswer Fax Associated Options Class 1 DetailsStored Fax Profile Class 1 Commands Dial Command D Answer Command a On Hook H Service Class Indication +FCLASS? Service Class Capabilities +FCLASS=?Off Hook H1 Class 0 Operation +FCLASS=0 Receive Silence +FRS=Time Fax Transmit and Receive ModesValues for Fax Modulatio n Modulation Speed Facsimile Transmit +FTM=Mod Facsimile Receive +FRM=ModValues for Fax Modulation Speed Hdlc Transmit +FTH=Mod Hdlc Receive +FRH=ModTest Supported Range of Values +FTx=?, +FRx=? Class 1 Result Code +FCERROR Command DescriptionBinary File Transfer Fax Autoanswer +FAA= Chapter Status Registers Registers Changing S-Register Values Register Operation Sn?, Sn? Changing Register Values Sn=v, Sn=v Individual Bit Command Sn . # =v Ring Count S1 Escape Character S2 End-of-Line Character S3Line-Feed Character S4 Backspace Character S5 Pause Interval for Comma S8 Carrier Detect Time S9Lost Carrier Detect Time S10 Dtmf Tone Duration S11 Bit Value Command Description S13Bit Mapped S14 S15 Test Timeout S18 System Tests S16S17 S19 Bit Mapped S21 Comman Bit Value Description Bit Mapped S22 Bit Mapped S23S24 RTS/CTS Delay S26 Lookback Timer S28DTR State Recognition S25 Bit Mapped S27 Bit Value Command Bit Mapped S29Bit Mapped S30 S31 DTR / Dial Backup Number to Dial S35 Remote Configuration Escape Character S41Bit Mapped S32 S33 Remote Configuration Guard Time S42 S43XON Character from DTE S44 Xoff Character from DTE S45 Leased Line Transmit Level S52 Automatic Rate Adaption Threshold S53 \Q3 Enable bilateral CTS/RTS flow control Disable modem port flow controlFlow Control S54 S55 Inactivity Timer S58 Compression Control S56Bit Mapped S57 Break Control S59 101 \K5 Break option Enable auto retrain MNP compression enabledDisable auto-reliable data buffer Bit Mapped S60 Disconnect Buffer Delay S62 Maximum Transmit Block Size S63Auto-Reliable Fallback Character S64 S65-66 Link Speed Status S67 S68 DCE Independent Speed S69 10010 B18 33,600 bps Operating Mode S70 Operating Mode Status S71\M1 Enable V.42 fast detect 111 \N7 Lapm or MNP or native auto Reliable Password Timeout S73 Callback Delay S74Bit Mapped S72 Callback Retry S75 Callback Retry Delay S76 Autocallback Timer S78Lockout Threshold S77 Break Length S79 Serial Port or DTE Speed S80 00001 Disabled Enable negotiation statusMinimum DCE Speed S81 Negotiation Status S82 Enable any key abort Bit Mapped S84S85-S87 Modulation Type S88 Current Modulation S91 S92 S94 Settings S95 Asymmetric Settings S96Bit Mapped S97 S98- S100 Chapter Bis Autodialer Autodialer Command Strings and Parameters Software Guidelines Invalid Responses Bis Commands and Responses Dial ParametersParameters Function Dial Command CRN nn...n Program Number Command PRN ann...n Intermediate Call Progress Response Dial Stored Number CRS aCNX@nnnnnBPS Sepacall progress messages Request List of Stored Numbers RLN Disregard Incoming Call DICEtbsysystxLSNsp LSNann...nsepann...n Connect Incoming Call CIC Redial Last Number CRR nLink Number by Address PRL ab Seprcall progress messages Request List of Linked Numbers RLL Modem Options Command PRO xxxyy00 Request List of Version RLVEtbspspstxLSLsp LSLalsepal Modem 11-11 Save Current Settings PRK Restore Factory Settings PRP n Request List of Stored Options RLO xxx yy V.25 Autodialer Options Definition Settings Default Options Modem 11-15 Ebcdic Ascii Modem 11-17 Test Bilateral Commanded Loop Chapter Maintenance Fuse ReplacementMaintenance General Calling Technical Support Appendix a Specifications Size Modem Data Rates Modulation Speed Carrier Detect Level Page Appendix B Phone Jack Descriptions Pin FunctionPage Appendix C Hardware Options Jumper Option Selection Figure C-1. Cover Removal Figure C-2. Jumper Location for Ground Option Replacing the Cover Appendix D Fault Isolation Procedure Fault Isolation Procedure Modem and Telephone Line Check Part Modem Page Appendix E Command Index and Defaults Command Reg Description Wait for 2nd dial tone S7 value Command Reg Description Restore factory configuration 1 † EBCDIC, NRZ1 Command Reg Description Command Reg Description Command Reg Description BER Command Reg Description DCE Switches modem to talk mode † Command Reg Description Command Reg Description Fax Command Description Command Description ValueModulationSpeed Command Description Low Security High Security †cannot be executed from remote configuration mode Modem Remote Configuration Commands Data bits, mark parity, 1 stop bit Default Reg Function Factory Set RO=Read only RW=Read or write Modem Default Bis Dialer Commands Synchronous Description Command Synchronous Description Command Response Messages Response Message Meaning INC Asynchronous Dial-up with V.42 bis Protocol AT&F or AT&F1 Modem Options DCE rate 33600 Modulation automodeDial Line Options Tone dial Factory Option Set # Asynchronous Dial-up without V.42 bis Protocol AT&F2 Factory Option Set #3 Synchronous 4-wire Leased Line AT&F4 Modem Options DCE rate Asynchronous 4-wire Leased Line withV.42bis Protocol AT&F5 Factory Option Set #5 Factory Option Set # Synchronous 2-wire Leased Line Normal Originate AT&F7 Synchronous 2-wire Leased Line Forced Answer AT&F8 Factory Option Set #9 Synchronous V.25bis Dialer AT&F9 Appendix F Ascii and Ebcdic Characters NUL ESC ET end of transmission ACK0 DEL Hardware Options Hardware Options Hardware Options Hardware Options Appendix G Abbreviations and Acronyms Abbreviations and Acronyms PBX Xmit Appendix H Flash Upgrade What You Need Troubleshooting Service and Support Page Index Index-2V.3600 3600Index-3 Index-4V.3600 3600Index-5 Index-6V.3600 3600Index-7 Index Index-8V.3600