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
 Preface
How to Use this Manual
Objectives and Reader Assumptions
 Related Documents
 Introduction
Features
Overview
 Multipoint Applications
Leased Backup Applications
Comsphere 391x Series Models
 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 Specifications
Model Certification Number See label on modem
Leased-Line Modulations
 Specifications Description
Technical Specifications for 391x Series Modems
Pin D-subminiature connector EIA-232-D/ITU-T
100 to 250 Vac, 50 to 60 Hz
 MNP
ITU-T
ITU-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 Connection
Model 3910 Leased Backup Connection
DTE Connection
 Modem Power-Up
Power Supply Connection
Power 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 LEDs
Alrm
Diag
 Diagnostic Control Panel Operation
 LCD Display
 Key
Keypad
 Top-Level Menu Status and Operational Messages
Menu Structure
 Dial Backup or
Call Setup
Leased Backup
Top-Level Menu Status
 Status Message Indicates Call Failure
 Reset
AT Command
Status Message Indicates Call Disconnect
Firmware
 Dial Access Security Indicates Message
Dial Access Security Messages
Common Operational Messages
Common Indicates Operational Message
 Leased19.2 Status Configure
Quick Configuration Display
Leased19.2 abbb cdd ee ffff
 Comsphere 3900 Series Modems
 DTE
Status Branch
 Status DeviceHS VF
Device Health and Status DeviceHS
Device HS Major Minor
 Type Message Indicates Major
Health and Status Messages
Minor
Status
 Thresh
Type Message Indicates Dial
Security
Port
 RcvLevel
SigQual
Sig/Noise
NrEchLvl
 Identity
 Status Identity DTE
Backup
LSD DTR DSR Tst
 StatusBackup Line=Pri 4w APL
Backup
StatusBackup Bkup2wAPL=Good
Status
 Backup Status Screens
 Record
Options
Options
OptionsStatus 29V.33
 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 ActivOperating
Editing and Saving a Configuration Option
LdEditAreafrm Factory
 Choose Mode Answer Originate
Ld Fact Preset SyncLeased
Choose Function EditSave
Edit StrapGroup DTEInterface
 RemAccssPasswrd Nxt
StrapsWhenDisc Nxt NoChange
 Choose Function Edit Save
Summary
Sav EditArea to ActiveSaved
 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
 DTE Dialer
Extend Main Ch. Disable Nxt Disable Enable
Primary 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
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
 Leased19.2 PList Control
Display
Poll List Display Clear
 Clear
Clear function does not appear in Remote mode
Change
Change function does not appear in Remote
 Poll Listyyyyyy Ent
Poll ListChang Active Delete
 Add
Acquire function does not appear in Remote mode
Acquire
 Poll ListAcquir Num Acquired yyy
Poll ListAcquir Abort xxx yyy
 Control Branch
 Speaker
Control Speaker Reset
Leased19.2 Control Test
Speaker Control Off Low Med
 Data Stream function is not available in Async mode
Reset
Data Stream Port1 Disable
Data Stream
 Eialed Command Complete
Data Stream Port1 Enable
EIA LEDs
Control EIALEDs
 Make Busy/Remove Make Busy
Make Busy Command Complete
Control MakeBusy
 Control ServiceLine
Service Line/Disconnect Service Line
Control RemoveMakeBusy
 Selecting Clone Remote
Download Software
Control DownloadCode
DwnLoadSoftware CloneRemote
 Clone Remote in Broadcast Configurations
Clone Remote in Point-to-Point Configurations
Cloning DC Broadcast Remote
Choose DLL Type SCClone
 Viewing DC Broadcast Clone Results
Clone Remote in Multipoint Configurations
Choose DLL Type DCCloneResults
DC Clone Results Nxt xxx Pass
 Cloning a Single TMp Remote
Choose Password Ent yyyyyyyy
Choose DLL Type Single Multiple
Choose Address Ent
 Viewing Multiple TMp Clone Results
Cloning a Multiple TMp Remote
Choose DLL Type MPtCloneResults
MPtCloneResults Nxt xxx Pass
 Incompat Modulat
Implementing a Clone Remote Operation
No Response
 Access Disabled
VF Thresholds Update
Password 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
 Abort
TestAbort Command Complete
Test Abort Self
 Self
 Test LocAnalogLoop
Loc Analog Loop
TestLocal Loop Started
 Test RemDigitalLoop
Rem Digital Loop
 TestRemote Loop Started
Loc Digital Loop
 Test LocDigitalLoop
Pattern
TestDigitl Loop Started
 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
 Call Setup Dial Disconnect
Leased19.2 CallSetup
Dial
DialDirectory Nxt
 Disconnect
Disconnect Command Complete
DialDirectory01 Off Hook
 Answer Command Complete
Call Setup Answer
Answer
 Call Setup ReturntoDial
Call Setup Dial Standby
Dial Standby/Return to Dial
 Call Setup ChangeDirectory
Dial Standby Command Complete
Change Directory
 02 z Nxt
01 551234 z Nxt
019W5556789z Nxt
 Valid Dial Command Modifiers
 Directory Status Does Not Appear in North America
Call Setup DirectoryStatus
Number Status Nxt 01Allowed
 10-10
 Talk/Data Branch11
Talk/Data function is not available in TMp Control mode
Model 3911 modems
 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 Ctrl
Set 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 Security
Reset Security AbortSecReset
Reset Security EraseAllPasswd
 Security Configuration Options
Security Configuration Options
EntryWaitTime 20 sec Nxt 20 sec 10 sec 40 sec 60 sec
 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
 Switching Between Data Mode and Online Command Mode
AT Command Set and S-Registers14
Operating Modes
 Command Guidelines
 Result Codes
Result Codes
Numbers Word Description
 AT Command Format
AT Command List
Delayed number
Result Codes Numbers Word Description
 Command
391x Series AT Commands Description
ATD9W5551234
 14-6
 Sn=r
 Detect
Dial Tone
Busy Tone
Only displays OK, CONNECT, RING, no Carrier
 14-9
 14-10
 Bert
 \C0
\A3
 \G0
\D0
\N5
 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
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 Symptom Action
Troubleshooting B
Table B-1
Modem Health
 Table B-2
Dial Backup Operation
Leased-Line Operation
Table B-3
 Modem DTE Connection
Table B-4
 Verify that the DTE is providing DTR to the modem
Modem VF Connection
If the DTE does not provide DTR to the modem, verify that
 Branch
 Table B-6
 Pin Assignments C
 EIA-232-D Pin Assignments
Signal Circuit Function Source
Table C-1 EIA-232-D Pin Assignments Name
 Table C-2 VF Connector Pin Assignments Type of Telco Jack
VF Connector Pin Assignments
Leased 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 Commands
ITU-T V.25bis Dialing Commands D and Responses
Call Request with Number Provided CRN
 Call Response
Call Connecting CNX
Call Request with Stored Memory Address Provided CRS
Call Failure Indication CFI
 Delayed Call Indicator
Call Answer Commands
Incoming Call INC
Disregard Incoming Call DIC
 Program Normal PRN
Request List of Delayed Numbers RLD
Request List of Forbidden Numbers RLF
Request List of Stored Numbers RLN
 Command Response
List Delayed Numbers Response LSD
List Forbidden Numbers Response LSF
List Stored Numbers Response LSN
 Program Command
Call Answer Commands
Invalid INV
List Request
 Command Response
Call Connecting Indication
Valid Command
Call Failure Indication
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 Table E-1 Ascii Characters Hexadecimal Decimal Control Key
Ascii Character Table E
Character
 026
025
027
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
 Point-to-Point
Configuration Options
Cables
 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
 3910 E,G
Adapter
871A
 Equipment List H
Equipment Feature Part Number
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 Glossary
 Configuration area
Command mode
Configuration option
Connector
 Data mode
Mode Control Channel
Diagnostic Channel
Dial backup
 Indicator
Error control
Download
Downstream device
 Kbps
Interface
Keypad
Leased line
 Phase jitter
Originate mode
Power-up self-test
Quick Configuration
 RJ11
Return to Dial
RJ21
Secondary channel
 25bis
22bis
27bis
32bis
 Index
 DTE
 MNP
 RTS
 VF Thresholds Update
 Comsphere 3900 Series Modems Index-6