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
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 List of Tables
 Viii
 How to Use this Manual
Preface
Objectives and Reader Assumptions
 Related Documents
 Features
Introduction
Overview
 Leased Backup Applications
Multipoint Applications
Comsphere 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
 Technical Specifications
Technical Specifications for 391x Series Modems Description
Model Certification Number See label on modem
Leased-Line Modulations
 Technical Specifications for 391x Series Modems
Specifications Description
Pin D-subminiature connector EIA-232-D/ITU-T
100 to 250 Vac, 50 to 60 Hz
 ITU-T
MNP
ITU-T V.42bis
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 4-Wire/2-Wire Leased-Line Connection
Model 3910 Dial Backup Connection
Model 3910 Leased Backup Connection
DTE Connection
 Power Supply Connection
Modem Power-Up
Power On Selftst Passed
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
 Model 3910 and Model 3911 DCP LEDs
Label Color Indicates Pwr
Alrm
Diag
 Diagnostic Control Panel Operation
 LCD Display
 Keypad
Key
 Menu Structure
Top-Level Menu Status and Operational Messages
 Call Setup
Dial Backup or
Leased Backup
Top-Level Menu Status
 Status Message Indicates Call Failure
 AT Command
Reset
Status Message Indicates Call Disconnect
Firmware
 Dial Access Security Messages
Dial Access Security Indicates Message
Common Operational Messages
Common Indicates Operational Message
 Quick Configuration Display
Leased19.2 Status Configure
Leased19.2 abbb cdd ee ffff
 Comsphere 3900 Series Modems
 Status Branch
DTE
 Device Health and Status DeviceHS
Status DeviceHS VF
Device HS Major Minor
 Health and Status Messages
Type Message Indicates Major
Minor
Status
 Type Message Indicates Dial
Thresh
Security
Port
 SigQual
RcvLevel
Sig/Noise
NrEchLvl
 Identity
 Backup
Status Identity DTE
LSD DTR DSR Tst
 Backup
StatusBackup Line=Pri 4w APL
StatusBackup Bkup2wAPL=Good
Status
 Backup Status Screens
 Options
Record
Options
OptionsStatus 29V.33
 Record Status Display Clear
Record Number Modem O.K
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 DCP Configuration
 DCP Configuration Process
 AT Command Configuration Process
 Configure Branch
Choose Function
 Editing and Saving a Configuration Option
LdEditAreafrm ActivOperating
LdEditAreafrm Factory
 Ld Fact Preset SyncLeased
Choose Mode Answer Originate
Choose Function EditSave
Edit StrapGroup DTEInterface
 StrapsWhenDisc Nxt NoChange
RemAccssPasswrd Nxt
 Summary
Choose Function Edit Save
Sav 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 Dialer
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 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
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 Poll List Branch
 Display
Leased19.2 PList Control
Poll List Display Clear
 Clear function does not appear in Remote mode
Clear
Change
Change function does not appear in Remote
 Poll ListChang Active Delete
Poll Listyyyyyy Ent
 Acquire function does not appear in Remote mode
Add
Acquire
 Poll ListAcquir Abort xxx yyy
Poll ListAcquir Num Acquired yyy
 Control Branch
 Control Speaker Reset
Speaker
Leased19.2 Control Test
Speaker Control Off Low Med
 Reset
Data Stream function is not available in Async mode
Data Stream Port1 Disable
Data Stream
 Data Stream Port1 Enable
Eialed Command Complete
EIA LEDs
Control EIALEDs
 Make Busy Command Complete
Make Busy/Remove Make Busy
Control MakeBusy
 Service Line/Disconnect Service Line
Control ServiceLine
Control RemoveMakeBusy
 Download Software
Selecting Clone Remote
Control DownloadCode
DwnLoadSoftware CloneRemote
 Clone Remote in Point-to-Point Configurations
Clone Remote in Broadcast Configurations
Cloning DC Broadcast Remote
Choose DLL Type SCClone
 Clone Remote in Multipoint Configurations
Viewing DC Broadcast Clone Results
Choose DLL Type DCCloneResults
DC Clone Results Nxt xxx Pass
 Choose Password Ent yyyyyyyy
Cloning a Single TMp Remote
Choose DLL Type Single Multiple
Choose Address Ent
 Cloning a Multiple TMp Remote
Viewing Multiple TMp Clone Results
Choose DLL Type MPtCloneResults
MPtCloneResults Nxt xxx Pass
 Implementing a Clone Remote Operation
Incompat Modulat
No Response
 VF Thresholds Update
Access Disabled
Password Invalid
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
Abort
Test Abort Self
 Self
 Loc Analog Loop
Test LocAnalogLoop
TestLocal Loop Started
 Rem Digital Loop
Test RemDigitalLoop
 Loc Digital Loop
TestRemote Loop Started
 Pattern
Test LocDigitalLoop
TestDigitl Loop Started
 Test Pattern
TestPattern BlksErrd=xxxxxxx
 Test Branch
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 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
 Leased19.2 CallSetup
Call Setup Dial Disconnect
Dial
DialDirectory Nxt
 Disconnect Command Complete
Disconnect
DialDirectory01 Off Hook
 Call Setup Answer
Answer Command Complete
Answer
 Call Setup Dial Standby
Call Setup ReturntoDial
Dial Standby/Return to Dial
 Dial Standby Command Complete
Call Setup ChangeDirectory
Change Directory
 01 551234 z Nxt
02 z Nxt
019W5556789z Nxt
 Valid Dial Command Modifiers
 Call Setup DirectoryStatus
Directory Status Does Not Appear in North America
Number Status Nxt 01Allowed
 10-10
 Talk/Data function is not available in TMp Control mode
Talk/Data Branch11
Model 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
Admin Password? Ent
Set Access Ctrl EditPassWdTable
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
Security ResetSecurity
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
 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 Mode
Operating Modes
 Command Guidelines
 Result Codes
Result Codes
Numbers Word Description
 AT Command List
AT Command Format
Delayed number
Result Codes Numbers Word Description
 391x Series AT Commands Description
Command
ATD9W5551234
 14-6
 Sn=r
 Dial Tone
Detect
Busy Tone
Only displays OK, CONNECT, RING, no Carrier
 14-9
 14-10
 Bert
 \A3
\C0
 \D0
\G0
\N5
 42bis Compression Configure\Edit\
Disable V42/MNP/Buffer
Register List
\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
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 Troubleshooting B
Symptom Action
Table B-1
Modem Health
 Dial Backup Operation
Table B-2
Leased-Line Operation
Table B-3
 Table B-4
Modem DTE Connection
 Modem VF Connection
Verify that the DTE is providing DTR to the modem
If 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 Assignments
Table C-1 EIA-232-D Pin Assignments Name
 VF Connector Pin Assignments
Table C-2 VF Connector Pin Assignments Type of Telco Jack
Leased Dial RJ11
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 Commands
Call Request with Number Provided CRN
 Call Connecting CNX
Call Response
Call Request with Stored Memory Address Provided CRS
Call Failure Indication CFI
 Call Answer Commands
Delayed Call Indicator
Incoming Call INC
Disregard Incoming Call DIC
 Request List of Delayed Numbers RLD
Program Normal PRN
Request List of Forbidden Numbers RLF
Request List of Stored Numbers RLN
 List Delayed Numbers Response LSD
Command Response
List Forbidden Numbers Response LSF
List Stored Numbers Response LSN
 Call Answer Commands
Program Command
Invalid INV
List Request
 Call Connecting Indication
Command Response
Valid Command
Call Failure Indication
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 Ascii Character Table E
Table E-1 Ascii Characters Hexadecimal Decimal Control Key
Character
 025
026
027
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-Point
Cables
 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,G
871A
 Equipment Feature Part Number
Equipment List H
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 Glossary
 Command mode
Configuration area
Configuration option
Connector
 Mode Control Channel
Data mode
Diagnostic Channel
Dial backup
 Error control
Indicator
Download
Downstream device
 Interface
Kbps
Keypad
Leased line
 Originate mode
Phase jitter
Power-up self-test
Quick Configuration
 Return to Dial
RJ11
RJ21
Secondary channel
 22bis
25bis
27bis
32bis
 Index
 DTE
 MNP
 RTS
 VF Thresholds Update
 Comsphere 3900 Series Modems Index-6