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
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 List of Tables
 Viii
 Objectives and Reader Assumptions
How to Use this Manual
Preface
 Related Documents
 Overview
Features
Introduction
 Comsphere 391x Series Models
Leased Backup Applications
Multipoint 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
 Leased-Line Modulations
Technical Specifications
Technical Specifications for 391x Series Modems Description
Model Certification Number See label on modem
 100 to 250 Vac, 50 to 60 Hz
Technical Specifications for 391x Series Modems
Specifications Description
Pin D-subminiature connector EIA-232-D/ITU-T
 MNP Class
ITU-T
MNP
ITU-T V.42bis
 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
 DTE Connection
Model 3910 4-Wire/2-Wire Leased-Line Connection
Model 3910 Dial Backup Connection
Model 3910 Leased Backup Connection
 Network Management System Connection
Power Supply Connection
Modem Power-Up
Power On Selftst Passed
 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
 Diag
Model 3910 and Model 3911 DCP LEDs
Label Color Indicates Pwr
Alrm
 Diagnostic Control Panel Operation
 LCD Display
 Key
Keypad
 Top-Level Menu Status and Operational Messages
Menu Structure
 Top-Level Menu Status
Call Setup
Dial Backup or
Leased Backup
 Status Message Indicates Call Failure
 Firmware
AT Command
Reset
Status Message Indicates Call Disconnect
 Common Indicates Operational Message
Dial Access Security Messages
Dial Access Security Indicates Message
Common Operational Messages
 Leased19.2 abbb cdd ee ffff
Quick Configuration Display
Leased19.2 Status Configure
 Comsphere 3900 Series Modems
 DTE
Status Branch
 Device HS Major Minor
Device Health and Status DeviceHS
Status DeviceHS VF
 Status
Health and Status Messages
Type Message Indicates Major
Minor
 Port
Type Message Indicates Dial
Thresh
Security
 NrEchLvl
SigQual
RcvLevel
Sig/Noise
 Identity
 LSD DTR DSR Tst
Backup
Status Identity DTE
 Status
Backup
StatusBackup Line=Pri 4w APL
StatusBackup Bkup2wAPL=Good
 Backup Status Screens
 OptionsStatus 29V.33
Options
Record
Options
 Record Number Modem O.K
Record Status Display Clear
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 DCP Configuration
 DCP Configuration Process
 AT Command Configuration Process
 Choose Function
Configure Branch
 LdEditAreafrm Factory
Editing and Saving a Configuration Option
LdEditAreafrm ActivOperating
 Edit StrapGroup DTEInterface
Ld Fact Preset SyncLeased
Choose Mode Answer Originate
Choose Function EditSave
 RemAccssPasswrd Nxt
StrapsWhenDisc Nxt NoChange
 Sav EditArea to ActiveSaved
Summary
Choose 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 Enable
DTE 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
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 Poll List Branch
 Poll List Display Clear
Display
Leased19.2 PList Control
 Change function does not appear in Remote
Clear function does not appear in Remote mode
Clear
Change
 Poll Listyyyyyy Ent
Poll ListChang Active Delete
 Acquire
Acquire function does not appear in Remote mode
Add
 Poll ListAcquir Num Acquired yyy
Poll ListAcquir Abort xxx yyy
 Control Branch
 Speaker Control Off Low Med
Control Speaker Reset
Speaker
Leased19.2 Control Test
 Data Stream
Reset
Data Stream function is not available in Async mode
Data Stream Port1 Disable
 Control EIALEDs
Data Stream Port1 Enable
Eialed Command Complete
EIA LEDs
 Control MakeBusy
Make Busy Command Complete
Make Busy/Remove Make Busy
 Control RemoveMakeBusy
Service Line/Disconnect Service Line
Control ServiceLine
 DwnLoadSoftware CloneRemote
Download Software
Selecting Clone Remote
Control DownloadCode
 Choose DLL Type SCClone
Clone Remote in Point-to-Point Configurations
Clone Remote in Broadcast Configurations
Cloning DC Broadcast Remote
 DC Clone Results Nxt xxx Pass
Clone Remote in Multipoint Configurations
Viewing DC Broadcast Clone Results
Choose DLL Type DCCloneResults
 Choose Address Ent
Choose Password Ent yyyyyyyy
Cloning a Single TMp Remote
Choose DLL Type Single Multiple
 MPtCloneResults Nxt xxx Pass
Cloning a Multiple TMp Remote
Viewing Multiple TMp Clone Results
Choose DLL Type MPtCloneResults
 No Response
Implementing a Clone Remote Operation
Incompat Modulat
 No Circuit
VF Thresholds Update
Access Disabled
Password Invalid
 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 Complete
Abort
 Self
 TestLocal Loop Started
Loc Analog Loop
Test LocAnalogLoop
 Test RemDigitalLoop
Rem Digital Loop
 TestRemote Loop Started
Loc Digital Loop
 TestDigitl Loop Started
Pattern
Test LocDigitalLoop
 TestPattern BlksErrd=xxxxxxx
Test Pattern
 Test Branch
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 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
 DialDirectory Nxt
Leased19.2 CallSetup
Call Setup Dial Disconnect
Dial
 DialDirectory01 Off Hook
Disconnect Command Complete
Disconnect
 Answer
Call Setup Answer
Answer Command Complete
 Dial Standby/Return to Dial
Call Setup Dial Standby
Call Setup ReturntoDial
 Change Directory
Dial Standby Command Complete
Call Setup ChangeDirectory
 019W5556789z Nxt
01 551234 z Nxt
02 z Nxt
 Valid Dial Command Modifiers
 Number Status Nxt 01Allowed
Call Setup DirectoryStatus
Directory Status Does Not Appear in North America
 10-10
 Model 3911 modems
Talk/Data function is not available in TMp Control mode
Talk/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
 Security SetAcessCtrl
Set Access Ctrl
Admin Password? Ent
Set Access Ctrl EditPassWdTable
 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
 Reset Security EraseAllPasswd
Reset Security
Security ResetSecurity
Reset Security AbortSecReset
 EntryWaitTime 20 sec Nxt 20 sec 10 sec 40 sec 60 sec
Security Configuration Options
Security 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-Registers14
Switching Between Data Mode and Online Command Mode
 Command Guidelines
 Numbers Word Description
Result Codes
Result Codes
 Result Codes Numbers Word Description
AT Command List
AT Command Format
Delayed number
 ATD9W5551234
391x Series AT Commands Description
Command
 14-6
 Sn=r
 Only displays OK, CONNECT, RING, no Carrier
Dial Tone
Detect
Busy Tone
 14-9
 14-10
 Bert
 \C0
\A3
 \N5
\D0
\G0
 \X0
42bis Compression Configure\Edit\
Disable V42/MNP/Buffer
Register List
 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
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 Modem Health
Troubleshooting B
Symptom Action
Table B-1
 Table B-3
Dial Backup Operation
Table B-2
Leased-Line Operation
 Modem DTE Connection
Table B-4
 If the DTE does not provide DTR to the modem, verify that
Modem VF Connection
Verify 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 Source
EIA-232-D Pin Assignments
 Pin
VF Connector Pin Assignments
Table C-2 VF Connector Pin Assignments Type of Telco Jack
Leased Dial RJ11
 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 Responses
Call Request Commands
 Call Failure Indication CFI
Call Connecting CNX
Call Response
Call Request with Stored Memory Address Provided CRS
 Disregard Incoming Call DIC
Call Answer Commands
Delayed Call Indicator
Incoming Call INC
 Request List of Stored Numbers RLN
Request List of Delayed Numbers RLD
Program Normal PRN
Request List of Forbidden Numbers RLF
 List Stored Numbers Response LSN
List Delayed Numbers Response LSD
Command Response
List Forbidden Numbers Response LSF
 List Request
Call Answer Commands
Program Command
Invalid INV
 Call Failure Indication
Call Connecting Indication
Command Response
Valid Command
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 Character
Ascii Character Table E
Table E-1 Ascii Characters Hexadecimal Decimal Control Key
 028
025
026
027
 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 Options
Point-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
Adapter
3910 E,G
 Equipment List H
Equipment Feature Part Number
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 Glossary
 Connector
Command mode
Configuration area
Configuration option
 Dial backup
Mode Control Channel
Data mode
Diagnostic Channel
 Downstream device
Error control
Indicator
Download
 Leased line
Interface
Kbps
Keypad
 Quick Configuration
Originate mode
Phase jitter
Power-up self-test
 Secondary channel
Return to Dial
RJ11
RJ21
 32bis
22bis
25bis
27bis
 Index
 DTE
 MNP
 RTS
 VF Thresholds Update
 Comsphere 3900 Series Modems Index-6