Multipoint | Digicom 3910, 3911 specification

Sample Configurations

Multipoint

Figure G-2 shows a sample configuration for multipoint applications.

TMp control modems can accept mixed inbound rates from tributary modems. For example, one inbound link may be configured for 14.4 kbps while another link experiencing line impairments may be configured for 9.6 kbps. The following control/tributary rate combinations are allowed: control at 19.2 kbps, tributaries at 14.4 or 9.6 kbps; control at 14.4 kbps, tributaries at 14.4 or 9.6 kbps; control at 9.6 kbps, tributaries at 9.6 or 7.2 kbps; control at 7.2 kbps, tributaries at 7.2 or 4.8 kbps; control at 4.8 kbps, tributaries at 4.8 or 2.4 kbps; control at 2.4 kbps, tributaries at 2.4 kbps. Tributary rates will never exceed control rates. If tributary and control rates are equal, reducing the control rate will automatically reduce the tributary rate.

19200(TMp)

		TX	Leased
	DTE		Leased
	DTE	3910	A
	(Sync)	3910	A
	(Sync)
		Cable 1	Cable 2

14400(TMp)

		TX
	3910	B	DTE
	3910	B	(Sync)
			(Sync)
	Cable 2		Cable 1
	14400(TMp)
		TX
	3910	C	DTE
	3910	C	(Sync)
			(Sync)

Cable 2

Cable 1

Figure G-2. Sample Configuration — Multipoint

Configuration Options

3910 A Use TMp (Control) default configuration options.

3910 B Use TMp (Trib) default configuration options.

3910 C Use TMp (Trib) default configuration options.

Cables

Cable 1 Use a standard, customer-supplied, EIA-232-D/V.24 cable with a DB-25-P (plug) connector at one end to attach to the modem. Attach this to the connector labeled DTE1.

Cable 2 Use part number 125-0053-1431 (an 8-position, 8-wire modular cord that is supplied with the modem). Attach this to the connector labeled LEASED.

3910-A2-GN32-40

September 1998

G-3

Image 257

Digicom 3910, 3911 operation manual Figure G-2. Sample Configuration Multipoint

Contents

Document No -A2-GN32-41 Trademarks Warranty, Sales, and Service Information 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 Objectives and Reader Assumptions How to Use this ManualPreface Related Documents Overview FeaturesIntroduction Comsphere 391x Series Models Leased Backup ApplicationsMultipoint Applications Model Standalone Model 3910 4-Wire/2-Wire Modem Carrier-Mounted Model 3911 4-Wire/2-Wire Modem United States Government Requirements and Equipment Return Comsphere 3900 Series Modems Canada Technical Specifications for 391x Series Modems Description Technical SpecificationsModel Certification Number See label on modem Leased-Line Modulations Specifications Description Technical Specifications for 391x Series ModemsPin D-subminiature connector EIA-232-D/ITU-T 100 to 250 Vac, 50 to 60 Hz MNP ITU-TITU-T V.42bis MNP Class 391x Series Modem Package Modem Installation Customer-Supplied Equipment Model 3910 Modem Installation Model 3910 Rear Panel and Power Supply Connecting Cables to the Model 3910 Modems Model 3910 Dial Backup Connection Model 3910 4-Wire/2-Wire Leased-Line ConnectionModel 3910 Leased Backup Connection DTE Connection Modem Power-Up Power Supply ConnectionPower On Selftst Passed Network Management System Connection Using the Diagnostic Control Panel DCP Selecting Factory Configuration Options Type AT Using AT Commands Type AT&Fy&Wn Removing and Replacing Model 3910 Modems Model 3911 Modem Installation Installing a Model 3911 Modem Circuit Pack Lock Removing and Replacing Model 3911 Modems DCP Operation Diagnostic Control Panels Model 3910 DCP Model 3910 Diagnostic Control Panel Optional SDCP, Model 3911 Faceplate, and Optional SDU Status Indicators Label Color Indicates Pwr Model 3910 and Model 3911 DCP LEDsAlrm Diag Diagnostic Control Panel Operation LCD Display Key Keypad Top-Level Menu Status and Operational Messages Menu Structure Dial Backup or Call SetupLeased Backup Top-Level Menu Status Status Message Indicates Call Failure Reset AT CommandStatus Message Indicates Call Disconnect Firmware Dial Access Security Indicates Message Dial Access Security MessagesCommon Operational Messages Common Indicates Operational Message Leased19.2 abbb cdd ee ffff Quick Configuration DisplayLeased19.2 Status Configure Comsphere 3900 Series Modems DTE Status Branch Device HS Major Minor Device Health and Status DeviceHSStatus DeviceHS VF Type Message Indicates Major Health and Status MessagesMinor Status Thresh Type Message Indicates DialSecurity Port RcvLevel SigQualSig/Noise NrEchLvl Identity LSD DTR DSR Tst BackupStatus Identity DTE StatusBackup Line=Pri 4w APL BackupStatusBackup Bkup2wAPL=Good Status Backup Status Screens Record OptionsOptions OptionsStatus 29V.33 Record Number Modem O.K Record Status Display Clear This page intentionally left blank DCP Configuration DCP Configuration Process AT Command Configuration Process Choose Function Configure Branch LdEditAreafrm Factory Editing and Saving a Configuration OptionLdEditAreafrm ActivOperating Choose Mode Answer Originate Ld Fact Preset SyncLeasedChoose Function EditSave Edit StrapGroup DTEInterface RemAccssPasswrd Nxt StrapsWhenDisc Nxt NoChange Sav EditArea to ActiveSaved SummaryChoose Function Edit Save DTE Interface Configuration Tables 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 Primary data can only be extended one link Extend Main Ch. Disable Nxt Disable EnableDTE Dialer 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 Line Dialer Configuration Options 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 Dial Line Configuration Options V32bis Automode Enable Nxt Enable Disable System V22b Guard Tone Disable Nxt Disable 550Hz 1800Hz Leased Line Leased Line Configuration Options 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 XON/XOFF Flw Cntl of DTE CTStoDTE Nxt CTStoDTE Disable XON/XOFF XON/XOFF Psthru Disable Nxt Disable Enable Break Buffr Ctl KeepData Nxt KeepData DiscardData BuffrDiscDelay 10sec Nxt 10sec Disable 60sec Test Test Configuration Options Test Configuration Options Misc Miscellaneous Configuration Options Miscellaneous Configuration Options Miscellaneous Configuration Options Security Diag Connection ModemDC Nxt ModemDC Nmscc Disable This page intentionally left blank Poll List Branch Poll List Display Clear DisplayLeased19.2 PList Control Clear Clear function does not appear in Remote modeChange Change function does not appear in Remote Poll Listyyyyyy Ent Poll ListChang Active Delete Acquire Acquire function does not appear in Remote modeAdd Poll ListAcquir Num Acquired yyy Poll ListAcquir Abort xxx yyy Control Branch Speaker Control Speaker ResetLeased19.2 Control Test Speaker Control Off Low Med Data Stream function is not available in Async mode ResetData Stream Port1 Disable Data Stream Eialed Command Complete Data Stream Port1 EnableEIA LEDs Control EIALEDs Control MakeBusy Make Busy Command CompleteMake Busy/Remove Make Busy Control RemoveMakeBusy Service Line/Disconnect Service LineControl ServiceLine Selecting Clone Remote Download SoftwareControl DownloadCode DwnLoadSoftware CloneRemote Clone Remote in Broadcast Configurations Clone Remote in Point-to-Point ConfigurationsCloning DC Broadcast Remote Choose DLL Type SCClone Viewing DC Broadcast Clone Results Clone Remote in Multipoint ConfigurationsChoose DLL Type DCCloneResults DC Clone Results Nxt xxx Pass Cloning a Single TMp Remote Choose Password Ent yyyyyyyyChoose DLL Type Single Multiple Choose Address Ent Viewing Multiple TMp Clone Results Cloning a Multiple TMp RemoteChoose DLL Type MPtCloneResults MPtCloneResults Nxt xxx Pass No Response Implementing a Clone Remote OperationIncompat Modulat Access Disabled VF Thresholds UpdatePassword Invalid No Circuit RSL High dBm Nxt VF Thresholds Edit Save Reset Save VF Thresh Thd Out of Range If you want to modify additional VF thresholds, select Nxt Valid Ranges for VF Thresholds Default Values Test Branch Test Abort Self TestAbort Command CompleteAbort Self TestLocal Loop Started Loc Analog LoopTest LocAnalogLoop Test RemDigitalLoop Rem Digital Loop TestRemote Loop Started Loc Digital Loop TestDigitl Loop Started PatternTest LocDigitalLoop TestPattern BlksErrd=xxxxxxx Test Pattern Test Branch This page intentionally left blank Leased19.2 TestSubHS Sub-Network Health Status Branch Press the key until SubHS appears. Select SubHS Call Setup function is not available in TMp Control mode Call Setup Branch10 Call Setup Dial Disconnect Leased19.2 CallSetupDial DialDirectory Nxt DialDirectory01 Off Hook Disconnect Command CompleteDisconnect Answer Call Setup AnswerAnswer Command Complete Dial Standby/Return to Dial Call Setup Dial StandbyCall Setup ReturntoDial Change Directory Dial Standby Command CompleteCall Setup ChangeDirectory 019W5556789z Nxt 01 551234 z Nxt02 z Nxt Valid Dial Command Modifiers Number Status Nxt 01Allowed Call Setup DirectoryStatusDirectory Status Does Not Appear in North America 10-10 Model 3911 modems Talk/Data function is not available in TMp Control modeTalk/Data Branch11 Idle19.2 Tlk/Data Online19.2 CallSetup Talk/Data Branch 11-4 Dial Access Security12 Answer Access Security Originate Access Security DTE-Side Passwords Leased19.2 Security Remote Security Branch Admin Password? Ent Set Access CtrlSet Access Ctrl EditPassWdTable Security SetAcessCtrl Select Index Ent EditPasswdTable Edit Password Table Group Options 12-8 Set Answer Security Group Options Set Access Ctrl SetAnswerSec Set Originate Security Group Options Set Access Ctrl SetOrigSec Set Admin PsWd Ent Set Access Ctrl SetAdminPsWd Security ResetSecurity Reset SecurityReset Security AbortSecReset Reset Security EraseAllPasswd EntryWaitTime 20 sec Nxt 20 sec 10 sec 40 sec 60 sec Security Configuration OptionsSecurity Configuration Options 12-14 12-15 Answer Access Password VF-Side and DTE-Side Entry Techniques Security Password Entry Techniques Originate Access Password Assigned to column is not stored in the modem Database Table Examples 12-19 12-20 Dial Access Security 12-22 Remote Branch13 To access the Remote branch, make the following selections Select Channel Secondary Prim Data blckd Trellis Multipoint tributary modems Online14.4 Control ExitRem Frnt Panl Acces GrantDeny Diagnostic Control Panel Access 13-6 Operating Modes AT Command Set and S-Registers14Switching Between Data Mode and Online Command Mode Command Guidelines Numbers Word Description Result CodesResult Codes AT Command Format AT Command ListDelayed number Result Codes Numbers Word Description ATD9W5551234 391x Series AT Commands DescriptionCommand 14-6 Sn=r Detect Dial ToneBusy Tone Only displays OK, CONNECT, RING, no Carrier 14-9 14-10 Bert \C0 \A3 \N5 \D0\G0 Disable V42/MNP/Buffer 42bis Compression Configure\Edit\Register List \X0 391x Series S-Registers Description Register Format 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 Symptom Action Troubleshooting BTable B-1 Modem Health Table B-2 Dial Backup OperationLeased-Line Operation Table B-3 Modem DTE Connection Table B-4 If the DTE does not provide DTR to the modem, verify that Modem VF ConnectionVerify that the DTE is providing DTR to the modem Branch Table B-6 Pin Assignments C Table C-1 EIA-232-D Pin Assignments Name Signal Circuit Function SourceEIA-232-D Pin Assignments Table C-2 VF Connector Pin Assignments Type of Telco Jack VF Connector Pin AssignmentsLeased Dial RJ11 Pin Auxiliary Cables Not Supplied Figure C-2. Wiring Diagram Y Cable for External Telephone Position Plug PIN no Figure C-4. Wiring Diagram 25-Pin Crossover Cable Call Request with Number Provided CRN ITU-T V.25bis Dialing Commands D and ResponsesCall Request Commands Call Response Call Connecting CNXCall Request with Stored Memory Address Provided CRS Call Failure Indication CFI Delayed Call Indicator Call Answer CommandsIncoming Call INC Disregard Incoming Call DIC Program Normal PRN Request List of Delayed Numbers RLDRequest List of Forbidden Numbers RLF Request List of Stored Numbers RLN Command Response List Delayed Numbers Response LSDList Forbidden Numbers Response LSF List Stored Numbers Response LSN Program Command Call Answer CommandsInvalid INV List Request Command Response Call Connecting IndicationValid Command Call Failure Indication This page intentionally left blank Character Ascii Character Table ETable E-1 Ascii Characters Hexadecimal Decimal Control Key 026 025027 028 Ascii Character Table Table E-1 Ascii Characters Hexadecimal Decimal Control Key Default Configuration Options F DTE Interface Table F-1 Factory Default Configuration Options DTE Dialer Line Dialer Leased Line Default Straps When Disconnected Entry Wait Time VF Prompt Type Sample Configurations G Cables Configuration OptionsPoint-to-Point Multipoint Figure G-2. Sample Configuration Multipoint Auto Dial Back Set to Enable Point-to-Point with Automatic Dial Backup Point-to-Point with Network Management Carrier with Network Management Extended Multipoint Figure G-6. Sample Configuration Extended Multipoint Rate at 19.2K Set ports 1, 2, 3, and 4 to Extended Diagnostics 871A Adapter3910 E,G Equipment List H Equipment Feature Part Number This page intentionally left blank Glossary Configuration area Command modeConfiguration option Connector Data mode Mode Control ChannelDiagnostic Channel Dial backup Indicator Error controlDownload Downstream device Kbps InterfaceKeypad Leased line Phase jitter Originate modePower-up self-test Quick Configuration RJ11 Return to DialRJ21 Secondary channel 25bis 22bis27bis 32bis Index DTE MNP RTS VF Thresholds Update Comsphere 3900 Series Modems Index-6