Figure C-4. Wiring Diagram 25-Pin Crossover Cable | Digicom 3911

COMSPHERE 3900 Series Modems

To connect a Model 3910 port to another modem’s EIA-232-D interface, use a 25-pin crossover cable (Figure C-4).

25-POSITION			25-POSITION
PLUG PIN NO.			PLUG PIN NO.

	1			1
TXD	2			2	TXD
RXD	3			3	RXD
RTS	4			4	RTS
	5			5
DSR	6			6	DSR
SG	7			7	SG
LSD	8			8	LSD
	9			9
	10			10
	11			11
	12			12
	13			13
	14			14
	15			15
	16			16
RXC	17			17	RXC
	18			18
	19			19
DTR	20			20	DTR
	21			21
	22			22
	23			23
XTXC	24			24	XTXC
	25			25

Figure C-4. Wiring Diagram — 25-Pin Crossover Cable

C-6

September 1998

3910-A2-GN32-40

Image 234

Digicom 3911, 3910 operation manual Figure C-4. Wiring Diagram 25-Pin Crossover Cable

Contents

Document No -A2-GN32-41 Warranty, Sales, and Service Information Trademarks Important Safety Instructions 3910-A2-GN32-40 Table of Contents Status Branch Remote Branch Glossary Index List of Figures This page intentionally left blank List of Tables Viii How to Use this Manual PrefaceObjectives and Reader Assumptions Related Documents Features IntroductionOverview Leased Backup Applications Multipoint ApplicationsComsphere 391x Series Models Standalone Model 3910 4-Wire/2-Wire Modem Model Carrier-Mounted Model 3911 4-Wire/2-Wire Modem Government Requirements and Equipment Return United States Comsphere 3900 Series Modems Canada Model Certification Number See label on modem Technical SpecificationsTechnical Specifications for 391x Series Modems Description Leased-Line Modulations Pin D-subminiature connector EIA-232-D/ITU-T Technical Specifications for 391x Series ModemsSpecifications Description 100 to 250 Vac, 50 to 60 Hz ITU-T V.42bis ITU-TMNP MNP Class Modem Installation 391x Series Modem Package Model 3910 Modem Installation Customer-Supplied Equipment Connecting Cables to the Model 3910 Modems Model 3910 Rear Panel and Power Supply Model 3910 Leased Backup Connection Model 3910 4-Wire/2-Wire Leased-Line ConnectionModel 3910 Dial Backup Connection DTE Connection Power On Selftst Passed Power Supply ConnectionModem Power-Up Network Management System Connection Selecting Factory Configuration Options Using the Diagnostic Control Panel DCP Using AT Commands Type AT Type AT&Fy&Wn Model 3911 Modem Installation Removing and Replacing Model 3910 Modems Installing a Model 3911 Modem Circuit Pack Lock Removing and Replacing Model 3911 Modems Diagnostic Control Panels DCP Operation Model 3910 Diagnostic Control Panel Model 3910 DCP Status Indicators Optional SDCP, Model 3911 Faceplate, and Optional SDU Alrm Model 3910 and Model 3911 DCP LEDsLabel Color Indicates Pwr Diag Diagnostic Control Panel Operation LCD Display Keypad Key Menu Structure Top-Level Menu Status and Operational Messages Leased Backup Call SetupDial Backup or Top-Level Menu Status Status Message Indicates Call Failure Status Message Indicates Call Disconnect AT CommandReset Firmware Common Operational Messages Dial Access Security MessagesDial Access Security Indicates Message Common Indicates Operational Message Quick Configuration Display Leased19.2 Status ConfigureLeased19.2 abbb cdd ee ffff Comsphere 3900 Series Modems Status Branch DTE Device Health and Status DeviceHS Status DeviceHS VFDevice HS Major Minor Minor Health and Status MessagesType Message Indicates Major Status Security Type Message Indicates DialThresh Port Sig/Noise SigQualRcvLevel NrEchLvl Identity Backup Status Identity DTELSD DTR DSR Tst StatusBackup Bkup2wAPL=Good BackupStatusBackup Line=Pri 4w APL Status Backup Status Screens Options OptionsRecord OptionsStatus 29V.33 Record Status Display Clear Record Number Modem O.K This page intentionally left blank DCP Configuration DCP Configuration Process AT Command Configuration Process Configure Branch Choose Function Editing and Saving a Configuration Option LdEditAreafrm ActivOperatingLdEditAreafrm Factory Choose Function EditSave Ld Fact Preset SyncLeasedChoose Mode Answer Originate Edit StrapGroup DTEInterface StrapsWhenDisc Nxt NoChange RemAccssPasswrd Nxt Summary Choose Function Edit SaveSav EditArea to ActiveSaved Configuration Tables DTE Interface DTE Interface Configuration Options Asyn Parity Bit None Nxt None Even Odd Mark Space DTE Interface Configuration Options DTE Interface Configuration Options DTE Interface Configuration Options DTE Interface Configuration Options DTE Interface Configuration Options TX Clock Source Internal Nxt Internal External RXCLoop Fallback2 Not available for TMp tributaries Extend Main Ch. Disable Nxt Disable Enable DTE DialerPrimary data can only be extended one link DTE Dialer Configuration Options AT Escape Char 043 Asci Nxt 043 Asci CarriageRtn Char 013 Asci Nxt 013 Asci AT Commands and S-Registers AT Cmnd Mode Normal Nxt Normal NoERROR NoStrapOrERR Line Dialer Configuration Options Line Dialer Blind Dial Pause 2sec Nxt 2sec 4sec 6sec 8sec 10sec 20sec Line Dialer Configuration Options Line Dialer Configuration Options Line Dialer Configuration Options Dial Line Configuration Options Dial Line V32bis Automode Enable Nxt Enable Disable System V22b Guard Tone Disable Nxt Disable 550Hz 1800Hz Leased Line Configuration Options Leased Line Leased Line Configuration Options V32bis Autorate Enable Nxt Enable Disable Leased Line Configuration Options V27bis Train Short Nxt Short Long 42/MNP/Buffer 42/MNP/Buffer Configuration Options 42/MNP/Buffer Configuration Options EC Negotiat Bfr Disable Nxt Disable Enable Disab&Switch Flw Cntl of DTE CTStoDTE Nxt CTStoDTE Disable XON/XOFF XON/XOFF XON/XOFF Psthru Disable Nxt Disable Enable Break Buffr Ctl KeepData Nxt KeepData DiscardData BuffrDiscDelay 10sec Nxt 10sec Disable 60sec Test Configuration Options Test Test Configuration Options Miscellaneous Configuration Options Misc Miscellaneous Configuration Options Miscellaneous Configuration Options Diag Connection ModemDC Nxt ModemDC Nmscc Disable Security This page intentionally left blank Poll List Branch Display Leased19.2 PList ControlPoll List Display Clear Change Clear function does not appear in Remote modeClear Change function does not appear in Remote Poll ListChang Active Delete Poll Listyyyyyy Ent Acquire function does not appear in Remote mode AddAcquire Poll ListAcquir Abort xxx yyy Poll ListAcquir Num Acquired yyy Control Branch Leased19.2 Control Test Control Speaker ResetSpeaker Speaker Control Off Low Med Data Stream Port1 Disable ResetData Stream function is not available in Async mode Data Stream EIA LEDs Data Stream Port1 EnableEialed Command Complete Control EIALEDs Make Busy Command Complete Make Busy/Remove Make BusyControl MakeBusy Service Line/Disconnect Service Line Control ServiceLineControl RemoveMakeBusy Control DownloadCode Download SoftwareSelecting Clone Remote DwnLoadSoftware CloneRemote Cloning DC Broadcast Remote Clone Remote in Point-to-Point ConfigurationsClone Remote in Broadcast Configurations Choose DLL Type SCClone Choose DLL Type DCCloneResults Clone Remote in Multipoint ConfigurationsViewing DC Broadcast Clone Results DC Clone Results Nxt xxx Pass Choose DLL Type Single Multiple Choose Password Ent yyyyyyyyCloning a Single TMp Remote Choose Address Ent Choose DLL Type MPtCloneResults Cloning a Multiple TMp RemoteViewing Multiple TMp Clone Results MPtCloneResults Nxt xxx Pass Implementing a Clone Remote Operation Incompat ModulatNo Response Password Invalid VF Thresholds UpdateAccess Disabled No Circuit VF Thresholds Edit Save Reset RSL High dBm Nxt If you want to modify additional VF thresholds, select Nxt Save VF Thresh Thd Out of Range Valid Ranges for VF Thresholds Default Values Test Branch TestAbort Command Complete AbortTest Abort Self Self Loc Analog Loop Test LocAnalogLoopTestLocal Loop Started Rem Digital Loop Test RemDigitalLoop Loc Digital Loop TestRemote Loop Started Pattern Test LocDigitalLoopTestDigitl Loop Started Test Pattern TestPattern BlksErrd=xxxxxxx Test Branch This page intentionally left blank Sub-Network Health Status Branch Leased19.2 TestSubHS Press the key until SubHS appears. Select SubHS Call Setup Branch10 Call Setup function is not available in TMp Control mode Dial Leased19.2 CallSetupCall Setup Dial Disconnect DialDirectory Nxt Disconnect Command Complete DisconnectDialDirectory01 Off Hook Call Setup Answer Answer Command CompleteAnswer Call Setup Dial Standby Call Setup ReturntoDialDial Standby/Return to Dial Dial Standby Command Complete Call Setup ChangeDirectoryChange Directory 01 551234 z Nxt 02 z Nxt019W5556789z Nxt Valid Dial Command Modifiers Call Setup DirectoryStatus Directory Status Does Not Appear in North AmericaNumber Status Nxt 01Allowed 10-10 Talk/Data function is not available in TMp Control mode Talk/Data Branch11Model 3911 modems Online19.2 CallSetup Idle19.2 Tlk/Data Talk/Data Branch 11-4 Dial Access Security12 Originate Access Security Answer Access Security DTE-Side Passwords Security Branch Leased19.2 Security Remote Set Access Ctrl EditPassWdTable Set Access CtrlAdmin Password? Ent Security SetAcessCtrl EditPasswdTable Select Index Ent Edit Password Table Group Options 12-8 Set Access Ctrl SetAnswerSec Set Answer Security Group Options Set Access Ctrl SetOrigSec Set Originate Security Group Options Set Access Ctrl SetAdminPsWd Set Admin PsWd Ent Reset Security AbortSecReset Reset SecuritySecurity ResetSecurity Reset Security EraseAllPasswd Security Configuration Options Security Configuration OptionsEntryWaitTime 20 sec Nxt 20 sec 10 sec 40 sec 60 sec 12-14 12-15 Security Password Entry Techniques Answer Access Password VF-Side and DTE-Side Entry Techniques Originate Access Password Database Table Examples Assigned to column is not stored in the modem 12-19 12-20 Dial Access Security 12-22 Remote Branch13 To access the Remote branch, make the following selections Trellis Multipoint tributary modems Select Channel Secondary Prim Data blckd Online14.4 Control ExitRem Diagnostic Control Panel Access Frnt Panl Acces GrantDeny 13-6 AT Command Set and S-Registers14 Switching Between Data Mode and Online Command ModeOperating Modes Command Guidelines Result Codes Result CodesNumbers Word Description Delayed number AT Command ListAT Command Format Result Codes Numbers Word Description 391x Series AT Commands Description CommandATD9W5551234 14-6 Sn=r Busy Tone Dial ToneDetect Only displays OK, CONNECT, RING, no Carrier 14-9 14-10 Bert \A3 \C0 \D0 \G0\N5 Register List 42bis Compression Configure\Edit\Disable V42/MNP/Buffer \X0 Register Format 391x Series S-Registers Description 14-16 14-17 14-18 14-19 14-20 = Ascii = Ebcdic 14-22 14-23 14-24 14-25 14-26 14-27 14-28 Menu Tree a DTE Eialeds This page intentionally left blank Table B-1 Troubleshooting BSymptom Action Modem Health Leased-Line Operation Dial Backup OperationTable B-2 Table B-3 Table B-4 Modem DTE Connection Modem VF Connection Verify that the DTE is providing DTR to the modemIf the DTE does not provide DTR to the modem, verify that Branch Table B-6 Pin Assignments C Signal Circuit Function Source EIA-232-D Pin AssignmentsTable C-1 EIA-232-D Pin Assignments Name Leased Dial RJ11 VF Connector Pin AssignmentsTable C-2 VF Connector Pin Assignments Type of Telco Jack Pin Figure C-2. Wiring Diagram Y Cable for External Telephone Auxiliary Cables Not Supplied Position Plug PIN no Figure C-4. Wiring Diagram 25-Pin Crossover Cable ITU-T V.25bis Dialing Commands D and Responses Call Request CommandsCall Request with Number Provided CRN Call Request with Stored Memory Address Provided CRS Call Connecting CNXCall Response Call Failure Indication CFI Incoming Call INC Call Answer CommandsDelayed Call Indicator Disregard Incoming Call DIC Request List of Forbidden Numbers RLF Request List of Delayed Numbers RLDProgram Normal PRN Request List of Stored Numbers RLN List Forbidden Numbers Response LSF List Delayed Numbers Response LSDCommand Response List Stored Numbers Response LSN Invalid INV Call Answer CommandsProgram Command List Request Valid Command Call Connecting IndicationCommand Response Call Failure Indication This page intentionally left blank Ascii Character Table E Table E-1 Ascii Characters Hexadecimal Decimal Control KeyCharacter 027 025026 028 Ascii Character Table Table E-1 Ascii Characters Hexadecimal Decimal Control Key Default Configuration Options F Table F-1 Factory Default Configuration Options DTE Interface DTE Dialer Line Dialer Leased Line Default Straps When Disconnected Entry Wait Time VF Prompt Type Sample Configurations G Configuration Options Point-to-PointCables Figure G-2. Sample Configuration Multipoint Multipoint Point-to-Point with Automatic Dial Backup Auto Dial Back Set to Enable Point-to-Point with Network Management Carrier with Network Management Figure G-6. Sample Configuration Extended Multipoint Extended Multipoint Rate at 19.2K Set ports 1, 2, 3, and 4 to Extended Diagnostics Adapter 3910 E,G871A Equipment Feature Part Number Equipment List H This page intentionally left blank Glossary Configuration option Command modeConfiguration area Connector Diagnostic Channel Mode Control ChannelData mode Dial backup Download Error controlIndicator Downstream device Keypad InterfaceKbps Leased line Power-up self-test Originate modePhase jitter Quick Configuration RJ21 Return to DialRJ11 Secondary channel 27bis 22bis25bis 32bis Index DTE MNP RTS VF Thresholds Update Comsphere 3900 Series Modems Index-6