COMSPHERE 3800
SERIES MODEMS
MODELS 3810, 3811, AND 3820
QUICK REFERENCE
Document No. 3810-A2-GL10-00
TM
COMSPHERE 3800 Series Modems
Models 3810, 3811, and 3820
Quick Reference
Document Number 3810-A2-GL10-00
October 1998
Electronic User Documentation
For more information, see the COMSPHERE 3800 Series Modems, Models 3810,
3811, and 3820, User’s Guide (Document No. 3810-A2-GB30). The User’s Guide is
provided on diskette. It may be installed on a PC using Microsoft Windows 3.1 or
above, then browsed or printed using the Adobe Acrobat Reader. The Reader is
available at no charge at Adobe’s World Wide Web site:
If it does not already exist, install the Adobe Acrobat Reader on your PC.
Installing the Documentation
The user documentation may be in a compressed format. Before installation, please
read the aboutdoc.txt file on the diskette for appropriate installation instructions.
Using the Adobe Acrobat Reader
For best viewing:
1. Use your operating system’s file manager to copy the PDF file to your hard disk,
then use the Adobe Acrobat Reader to open the file from your hard disk. This is not
required, but makes browsing through the document smoother and faster.
2. Maximize the Adobe Acrobat window so that it occupies the full screen.
3. Use the bookmarks along the left side to move around in the guide, the Index to
find specific topics, and the Find tool to search for particular text.
4. Once you find the topic you wish to read about, use the View menu to select Page
Only and Fit Visible.
1
Models 3810 and 3820 Installation
DIAGNOSTIC
CONTROL
PANEL
LCD AND KEYPAD
SPEAKER
STATUS
INDICATORS
AC TRANSFORMER
EIA-232-D
INTERFACE
NMS
DIAL/LEASED (3820)
PHONE/LEASED (3810)
AC POWER IN
ON/OFF
496-13096-02
2
Customer-Supplied Equipment for Models 3810 or 3820
The following customer-supplied equipment is required to complete a data
communications system using either the Model 3810 or Model 3820 modem:
H
H
A DTE with an available EIA-232-D serial port.
A standard EIA-232-D male-to-female cable with a male DB-25-S connector at one
end to attach to the modem.
H
One of the following modular dial or leased network interfaces:
— RJ11C for dial permissive applications
— An 8-position to 6-position crossover cable for JM8 leased-line applications
only
Model 3810 or 3820 Telephone Connection
Use the following procedures to connect the modem to a telephone:
1. Insert the 6-position, 4-conductor modular plug into the jack labeled
PHONE/LEASED (3810).
2. Insert the other end of the modular cord into the telephone.
Dial Network Management System Connection
For Model 3810 and 3820 modems, use the following procedures to connect the
modem to the network management system interface:
1. Insert the subminiature 4-conductor modular plug of the 3600 Hubbing Device into
the jack labeled NMS.
2. Connect the 3600 Hubbing Device to the network management system.
Refer to the 3600 Hubbing Device, Feature Number 3600-F3-300, Installation
Instructions (3610-A2-GZ45) for more information. Installation for the Model 3810 and
3820 modems is the same as for the 3610 DSU.
AC Power Transformer Connection
Use the following procedures to connect the modem to an ac power outlet:
1. Make sure the modem’s power switch is in the Off position.
2. Insert the power transformer’s 5-pin DIN male connector into the modem’s rear
panel ac power receptacle.
3. Insert the power transformer into a grounded ac power outlet.
3
Model 3810 Dial Connection
For the Model 3810, use the following procedures to connect the modem to the dial
network interface:
1. Insert the 6-position, 4-conductor modular plug into the jack labeled DIAL/LEASED
(3820).
2. Insert the other end of the modular cord into the network interface.
Model 3810 Leased Line Connection
Use the following procedures to connect a Model 3810 to the 2-wire or 4-wire
leased-line network interface:
1. Insert the 8-position, 8-conductor modular plug into the jack labeled
PHONE/LEASED (3810).
2. Insert the other end of the modular cord into the leased-line network interface.
PHONE
DIAL
NMS
DTE
0
1
PWR
LEASED LEASED
(3810) (3820)
98-13070-02
6-POSITION,
4-CONDUCTOR PLUG
FOR TELEPHONE SET
6-POSITION, 4-CONDUCTOR PLUG FOR
PERMISSIVE DIAL NETWORK OPERATION
(CONNECTS WITH RJ11C TYPE JACK)
8-POSITION,
8-CONDUCTOR PLUG
FOR LEASED LINE
NETWORK OPERATION
(CONNECTS WITH
JM8 TYPE JACK)
4
Model 3820 Network Connection
Use the following procedures to connect a Model 3820 to the dial or 2-wire leased-line
network interface:
1. Insert the 6-position, 4-conductor modular plug into the jack labeled DIAL/LEASED
(3820).
2. Insert the other end of the modular cord into the network interface.
PHONE
DIAL
NMS
DTE
0
1
PWR
LEASED LEASED
(3810) (3820)
98-13071-02
6-POSITION, 4-CONDUCTOR PLUG FOR
PERMISSIVE DIAL NETWORK OPERATION
(CONNECTS WITH RJ11C TYPE JACK)
6-POSITION,
4-CONDUCTOR PLUG
FOR TELEPHONE SET
– OR –
2-WIRE LEASED-LINE NETWORK OPERATION
(CONNECTS WITH 6-POSITION CENTER PAIR
LEASED JACK)
5
DTE Connection
Use the following procedures to connect the EIA-232-D cable and ferrite choke from
the modem to the DTE:
1. Make sure the modem’s rear panel power switch is Off.
2. Connect the DB-25 plug on the cable to the DB-25 socket labeled DTE on the
modem’s rear panel. Use a small screwdriver to fasten the cable to the modem.
3. Connect the other end of the cable to the DTE. Use a small screwdriver to fasten
the cable to the DTE.
To ensure compliance with FCC Part 15 Regulations, a ferrite choke must be installed
on the EIA-232-D interface cable.
1. Open the ferrite choke and place it around the DTE cable as close as possible to
the connector attached to the modem.
2. Close the two halves around the cable and snap the ferrite choke shut, pressing
down on the plastic latch to secure it.
3. Install a cable tie behind the ferrite choke to prevent it from sliding along the cable.
DTE
Connector
Ferrite
Choke
Cable Tie
98-13144-01
6
Model 3811 Installation
EIA-232/V.24
CONNECTOR
REAR
CONNECTOR
PLATE
FACEPLATE
Status
EIA-232/V.24
EDGE CARD
CONNECTOR
Pwr
Alrm
142
125
Test
Dial
RI
Busy
Serv
SQ
RS-366A/V.25
EDGE CARD
CONNECTOR
103
104
105
106
107
108
109
TXD
RXD
RTS
CTS
DSR
DTR
LSD
Front Panel
Spkr
RS-366A/V.25
CONNECTOR
3811
496-13155-02
7
Customer-Supplied Equipment for Model 3811
The following customer-supplied equipment is required for the installation of a
Model 3811 modem:
H
H
A COMSPHERE 3000 Series Carrier.
A male-to-female 50-pin mass termination cable. One Network Interface Module
(NIM) for modems installed in Slots 1–8 and one NIM for modems installed in Slots
9–16 (required for dial-line applications).
H
One of the following modular or 50-pin dial or leased network interfaces:
— RJ11C for single line dial permissive applications
— RJ21X for multiple line dial permissive applications
— 66 punchdown block or other demarcation device
H
H
One 6-position to 6-position modular cord (required for network management
applications).
A Shared Diagnostic Unit (SDU) (required for network management applications).
Model 3811 Installation
The Model 3811 is designed for installation in a COMSPHERE 3000 Series Carrier
which supplies operating power and the dial and/or leased-line network connections.
For correct power, DTE, dial-line, leased-line, NIM, and network management cabling
information, refer to the COMSPHERE 3000 Series Carrier, Installation Manual,
Document No. 3000-A2-GA31.
The installation of a Model 3811 varies slightly if an SDCP is installed on the front of the
carrier. To install a Model 3811 modem into the carrier without an SDCP, perform the
following steps:
CAUTION
If the Model 3811 is removed from the carrier, always use a ground
strap when handling the modem. Always store the Model 3811 in an
antistatic bag when it is removed from the carrier.
8
1. At the rear of the carrier, install the rear connector plate. Make sure the plate uses
the same slot position as that intended for the modem.
— Loosely fasten the plate. This allows for slight adjustments later when
installing the modem.
2. At the front of the carrier, hold the modem vertically, with the latch on its faceplate
in the open position, and insert it into the top and bottom card guides of one of the
slots numbered 1–16.
— Slide the modem into the slot, aligning the modem with the rear connector
plate, until the backplane connector and DTE connector seat firmly into the
back of the carrier. The faceplate latch automatically closes as you push the
modem into the carrier. To lock the modem into the carrier, press the faceplate
latch until a click is heard.
3. If the carrier is ON, the Power LED on the faceplate of the 3811 lights. After
several seconds the modem completes its power-up self-test in which all faceplate
LEDs light. If the modem fails, the Alrm LED on the faceplate flashes.
— Return to the rear of the carrier and tighten the rear connector plate.
9
If the modem is to communicate with an installed SDCP, install the modem as
described above and perform the following steps:
1. Press the
key on the SDCP. The cursor appears in the carrier selection
Select
entry.
2. Press the F1 (") or F2 (↓) key until the carrier number you want appears on the
LCD.
3. Press the
key to position the cursor on the slot selection entry.
4. Press the F1 (") or F2 (↓) key until the slot number (1–16) you want appears on
the LCD.
5. Press the
key to place the SDCP in direct communication with the
Select
selected modem.
— The LCD displays the Top-Level menu for the selected modem. In addition,
the Front Panel LED on the modem’s faceplate and the OK LED on the SDCP
light.
6. Once you have determined that the modem is installed properly and completed its
power-up self-test, rotate the circuit pack lock until it covers the faceplate latch.
This prevents the modem from accidently being removed once it is installed in a
carrier.
CIRCUIT
CARD
GUIDE
CLOSED
(LOCKED)
CIRCUIT
PACK
LOCK
CIRCUIT
CARD
GUIDE
OPEN
(UNLOCKED)
LATCH
495-11985a-03
10
Diagnostic Control Panel (DCP) – Models 3810 and 3820
The DCP is the user interface to the modem. It provides a 2-line, 32-character liquid
crystal display (LCD), a keypad, speaker grill, and status indicators.
HIDDEN
CHOICE
INDICATOR
KEYPAD
SPEAKER
I d l e : 1 9 . 2
C a l l _ S e t u p
F1
F2
F3
PWR
ALRM DIAG DTR RTS CTS TXD LSD RXD SQ TEST RATE
103
109 104
108 142
COMSPHERE 3810
105
106
RTS CTS TXD LSD RXD
103
109 104
SQ
COMSPHERE 3820
105
106
STATUS INDICATORS
11
Shared Diagnostic Control Panel (SDCP) – Model 3811
The SDCP is used to manage carrier-mounted 3811 modems. The Select key is used
to connect the SDCP to a modem or other device in a specific carrier and slot location.
Press the Select key, then enter the modem carrier (1–8) and slot (1–16) numbers. The
Front Panel LED lights up on the selected modem. Once the modem is selected,
operation of the SDCP is the same as for the standalone DCP.
Status
Direction and Function keys provide operator control.
Pwr
Alrm
142
125
Test
Dial
RI
Moves up one level from the current display.
Moves cursor or display to the left or right.
Returns display to Top-Level menu.
Busy
and
Serv
SQ
Selects item displayed directly above the key.
F1, F2, F3
103
104
105
106
107
108
109
TXD
RXD
RTS
CTS
DSR
DTR
LSD
Hidden Choice Indicators.
Front Panel
Spkr
Indicates more LCD selections are available to the left or right of what is
currently displayed on the LCD.
Indicates more configuration options are available below what is currently
displayed. Also indicates selected configuration option.
Nxt
End
Indicates last configuration option available for that group.
3811
CARRIER SLOTS 1–16
SDU
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Select
OK Alarm BckUp Test EC
COMSPHERE 3000
F1
F2
F3
LCD
SELECT
KEY
STATUS
INDICATORS
KEYPAD
OK Alarm BckUp Test EC
ERROR
CORRECTION
NETWORK
DEVICE
ALARM
DIAL
BACKUP
TEST
MODE
12
Configuration Option Procedures — DCP Commands
1. Move to the Configure branch and select a configuration area to load from: Active
(Operating), Active (Saved), Customer 1, Customer 2, or Factory (Async Dial,
Sync Dial, Sync Leased, or UNIX Dial). If Enhanced Throughput Cellular (ETC) is
installed, Factory areas Cellular (Mobile) and Cellular (PSTN) are also available.
Select Configure from the Top-Level menu.
Idle : 19.2
Test
Configure
F3
F1
F2
Scroll to the area you wish to load.
Ld EditArea frm
Factory
<
F3
F1
F2
2. Select Edit to choose the set of configuration options to be edited: DTE Interface,
DTE Dialer, Line Dialer, Dial Line, Leased Line, V.42/MNP/Buffer, Tests, Misc, or
Security.
Edit StrapGroup
Test
<
Misc
F3
F1
F2
3. When the new configuration is completed, Save the edited configuration options to
the desired configuration area: Active (Saved), Customer 1, Customer 2.
Sav EditArea to
Active (Saved)
>
F3
F1
F2
13
3800 Modems Menu Tree
Displays current status of modem along with
data rate and error control mode.
“Status”
to next page
Call_Setup
Tlk/Data
Status
Test
Dial
Answer
Disconnect
Change_Directory
Dial_Standby
or
★
VF
Identity DTE RS366A
Record
Return_to_Dial
Options
Ser#
Mod #
FRev
HPt#
FPt#
LSD
DTR
DSR
Tst
TXD
RXD
RTS
CTS
Directory Locations 1 – 10
CRQ
DLO
DPR
PND
DSC
ACR
SigQual
RcvLev
Sig/Noise
NearEcho
FarEcho
FarEchDel
Does not appear in Remote Mode.
(Rem_Digital_Loop, Loc_Digital_Loop, and
Pattern appear if the secondary channel is
used.)
EchoFreqOff
Some choices within this group may not
appear depending upon how previous
configuration options have been selected.
Abort
Self
Rem_Digital_Loop
Pattern
Carrier model only.
★
Loc_Digital_Loop
Loc_Analog_Loop
to next page
DTE_Interface
Async/Sync Mode
Async DTE Rate
#Data Bits
Parity Bit
#Stop Bits
DTRAction
DSR Control
RTSAction
CTS Control
RTS/CTS Delay
LSD Control
DTE_Dialer
DTE DialerType
AT Escape Char
Escape GuardTim
BreakForceEscap
CommandCharEcho
CarriageRtn Char
Backspace Char
Linefeed Char
Line_Dialer
AutoAnswerRing#
DialerType
Dial_Line
Dial Line Rate
19200(V32t)
16800(V32t)
14400(V32b)
12000(V32b)
9600(V32b)
7200(V32b)
4800(V32b)
2400(V22bis)
1200(V22)
1200(212A)
DialTone Detect
Blind Dial Paus
BusyTone Detect
"," PauseTime
NoAnswerTimout
Fast Disconnect
Line Crnt Disc
Long Space Disc
No Carrier Disc
No Data Disc
Result Codes
ExtendResltCode
ResultCode Form
AT Cmnd Mode
V25bis Coding
V25bis IdleFill
V.25b NewLineChr
DTR Cont Repeat
TX Clock Source
CT111_Rate Cntl
DTE_Rate=VF
0–300(V21)
Auto Make Busy
MakeBusyViaDTR
DTR Auto Redial
0–300(103J)
V32bisAutomode
V32bisAutorate
DialTX Level
V22b GuardTone
V32bisTrain
FallFwdDelay
98-14436a-03
14
from previous page
to next page
Configure
Ld EditArea frm:
Activ (Operating)
Customer2 Factory
Customer1
Async_Dial
Sync_Leased
Choose Mode
Cellular (Mobile)
✤
Active (Saved)
Sync_Dial
UNIX_Dial
Cellular (PSTN)
✤
Answer Originate
Choose Function
Edit
Save
Active (Saved) Customer1
Customer2
from previous page
Leased_Line
Leased Mode
LeasedLine Rate
19200(V32t)
V42/MNP/Buffer
Err Contrl Mode
V42/MNPorBfr
V42/MNPorDsc
MNP or Buffr
MNP or Disc
BufferMode
Tests
Misc
Security
DTE RL (CT140)
DTE LL (CT141)
TestTimeout
Rcv Remote Loop
V54Address
StrapsWhenDisc
Speaker Control
Speaker Volume
Access frm Remt
RemAccssPasswrd
Dir#1_Callback
NetMngmtAddress
NMS_Call_Msgs
NMS DTR Alarm
NetworkPosition
RJ11 Cellular Adapt
EntryWait_Time
VF_Prompt_Type
#DTE_PW_Tries
DTE_PW_TermChar
DTE_PW_BkSpChar
Get_User_ID
NMS_Reporting
Answer_Secur
Originate_Secur
16800(V32t)
14400(V32b)
12000(V32b)
9600(V32b)
7200(V32b)
4800(V32b)
2400(V22bis)
V32bisAutorate
LeasedTX Level
1800HzTrainTone
BdLnAuto Orig
RateAuto Orig
Auto Redial
AutoDialStandby
CarrierOnLevel
FallFwdDelay
V54 DeviceType
DirectMode
LAPM_or_Disc
LAPM_or_Buff
V42bis Compress
MNP5 Compress
EC Negotiat Bfr
EC Fallbck Char
Flw Cntl of DTE
Flw Cntl of Mdm
XON/XOFF Psthru
Mdm/Mdm FlowCtl
Break Buffr Ctl
Send Break Cntl
Tx Buff Disc Delay
Rx Buff Disc Delay
Max Frame Size
Cellular Enhance
✤
Does not appear if configured for
Synchronous mode
Only appears if Sync_Leased factory
template is selected.
Only appears if ETC is installed.
✤
✤
98-14436b-03
15
from previous page
Control
Remote
Security
Secondary
Prim (data blckd)
(ExitRem appears
instead of Remote when
using Remote Mode)
Set_Access_Ctrl
(Admin Password?)
Reset_Security
EditPassWdTable
Set_Orig_Secur
Set_Admin_PsWd
Set_Answer_Sec
Speaker
Make_Busy
or
Download Code
RemoveMakeBusy
Reset
Service_Line
or
DiscServLine
98-14436c-03
16
Configuration Option Procedures — AT Commands
Loading Factory Configurations
Use the AT&Fy&Wn command to load a factory configuration to either the Active
(Saved), Customer 1, or Customer 2 configuration area.
Type: AT&Fy&Wn
where: y is one of the following factory configurations:
0 = Async Dial
1 = Sync Dial
2 = Sync Leased (Answer)
3 = UNIX Dial
4 = Sync Leased (Originate)
5 = Cellular (Mobile) (Valid only if ETC is installed)
6 = Cellular (PSTN) (Valid only if ETC is installed)
where: n is one of the following configuration areas:
0 = Active (Saved)
1 = Customer 1
2 = Customer 2
Loading Configuration Areas to Active (Operating)
Use the ATZn command to load stored configurations from Active (Saved), Customer 1,
or Customer 2 configuration areas to Active (Operating).
Type: ATZn
where: n is one of the following:
0 = Active (Saved)
1 = Customer 1
2 = Customer 2
3 = Active (Saved) + Reset
17
AT COMMANDS
AT COMMANDS (continued)
Bold text indicates Async Dial factory defaults.
Qn
Result Codes
Q0
Enables result codes. Refer to Result
Codes section.
AT
A/
A
Attention Command Prefix/Autobaud
Rate. Indicates a command string has
started and determines the DTE’s data
rate and parity.
Q1
Q2
Disables result codes.
Enables originate modem to send result
codes to the DTE. Required for most
UNIX applications.
Repeat Last Command. Re-executes
last command string. (Not to be
preceded with AT or followed by pressing
Enter.)
Sr?
Displays value of S-Register (where r is
the register number).
Sr=n
Change S-Register. Changes the
contents of the S-Register (where r is the
register number and n is the assigned
value).
Answer Mode. Goes off-hook and
attempts to establish a connection
without waiting for a ring.
T
Enables Tone Dial mode.
Bn
B0
B1
ITU-T/Bell Mode
V.21 or V.22 (300 or 1200 bps).
Bell 103 or 212A (300 or 1200 bps).
Vn
V0
V1
V2
Result Code Format
Displays as digits (Numbers 1).
Displays as text.
Dn
Dial. Dials the telephone number entered
for n.
Displays as digits (Numbers 2).
Xn
X0
X1
Extended Result Codes; Dial Tone
Detect; Busy Tone Detect
DS=n
Dial Stored Number. Dials the number
stored in location n (1–10).
Disables extended result codes 5–16,
dial tone detect, and busy tone.
Enables extended result codes 5–16,
disables dial tone detect and busy tone
detect. Refer to Result Codes section.
Enables extended result codes 5–16, dial
tone detect, and disables busy tone
detect.
Enables extended result codes 5–16,
disables dial tone detect and enables
busy tone detect. Refer to Result Codes
section.
Enables extended result codes 5–16,
dial tone detect, and busy tone detect.
Refer to Result Codes section.
Adds EC suffix to extended result codes
(20–27) if error control is used, enables
dial tone detect and busy tone detect.
Adds either V.42 or MNP suffix to
extended result codes (20–27) if data
compression is used, enables dial tone
detect, and busy tone detect.
En
E0
E1
Command Character Echo
Disables echo to the DTE.
Enables echo to the DTE.
X2
X3
H0
H1
Modem goes on-hook.
Modem goes off-hook.
I0
I1
Displays product code–144.
Displays 3-digit firmware revision
number.
Performs an EPROM check.
Displays modem’s serial number.
Displays modem’s model number.
Displays part number of circuit card.
Displays firmware release number.
(same as I1)
I2
I3
I4
I5
I6
I9
I10=n
X4
X5
X6
Changes value of product code (0=144,
1=240, 2=480, 3=960, 4=120).
Firmware checksum.
I11
I19
Displays entire firmware revision number.
X7
DTE rate appears in CONNECT
message instead of line rate, enables dial
tone detect and busy tone detect. Refer
to Result Codes section.
Ln
L0,L1
L2
Speaker Volume
Selects low volume.
Selects medium volume.
Selects high volume.
L3
Yn
Y0
Y1
Long Space Disconnect
Disable.
Enable.
Mn
M0
M1
Speaker ON/Off Control
Speaker always Off.
Speaker ON until carrier signal
becomes active.
Zn
Z0
Reset and Load Active
Loads contents of Active (Saved) into
Active (Operating).
Loads contents of Customer 1 into Active
(Operating).
Loads contents of Customer 2 into Active
(Operating).
M2
O
Speaker always ON.
Returns modem to Data mode from
online Command mode.
Z1
Z2
P
Enables Pulse Dial mode.
18
AT COMMANDS (continued)
AT COMMANDS (continued)
Z3
Loads contents of Active (Saved) into
Active (Operating) and performs a reset.
Performs a full modem reset.
&F6
Cellular (PSTN). Valid only if ETC is
installed.
Z9
&Gn
&G0
&G1
&G2
V.22bis Guard Tone
&Cn
&C0
&C1
LSD Control
Disables guard tone.
Sets guard tone to 550 Hz.
Sets guard tone to 1800 Hz.
Forced On. Forces LSD ON at all times.
Standard RS232. LSD is ON when the
remote modem’s carrier signal is
detected. LSD is Off when carrier
signal is not detected.
Wink When Disc. LSD, normally forced
ON, turns Off for approximately 1 to 2
seconds upon disconnect.
&In
&I10
&I11
•
Dial Transmit Level
–10 dBm.
–11 dBm.
•
•
–32 dBm.
ETC 1.0 (Cellular). Valid only if ETC is
installed.
ETC 1.1 (Cellular). Valid only if ETC is
installed.
&C2
•
&C3
&C4
&C5
Follows DTR. State of LSD follows state
of DTR.
&I32
&I99
Simulated Control Carrier. State of LSD
follows state of remote modem’s RTS.
=DTR/DiscOff. State of LSD follows
state of DTR except upon a disconnect
where DTR remains ON and LSD turns
Off. DTR must then toggle Off and ON to
turn LSD ON. Required for AT&T
DATAKIT dial-out applications.
Bridge Retrain. LSD behaves as in
Standard RS232, except that it is turned
Off when retrain lasts longer than 10
seconds, and ON when no retrain is
detected for 10 seconds.
&I100
&Jn
&J0
Dial Transmit Level Type
Modem sets dial transmit level to
Permissive mode at –9 dBm.
Leased-Line Mode
Disables leased-line operation.
2-wire originate leased-line operation.
4-wire originate leased-line operation.
2-wire answer leased-line operation.
4-wire answer leased-line operation.
&Ln
&L0
&L1
&L2
&L3
&L4
&C6
&Dn
&D0
DTR Action
&Mn,&Qn Async/Sync Mode and DTE Dialer Type
&M0,&Q0 Modem operates in Asynchronous
mode and uses AT command protocol.
&M1,&Q1 Modem operates in Synchronous mode
and uses AT command protocol.
&M2,&Q2 Modem operates in Synchronous mode
and dials telephone number stored in
directory location 1 when DTR signal
turns Off and then ON.
&M3,&Q3 Modem operates in Synchronous mode
and uses AT command protocol.
Ignore. Modem ignores the DTR (Data
Terminal Ready) signal and treats it as
always ON.
Off=Command Mode. Modem enters
online Command mode when DTR is
lowered.
Standard RS232. DTR signal is
controlled by the DTE.
Off=Reload Straps. Modem loads Active
(Operating) area with Active (Saved)
area when DTR is lowered.
&D1
&D2
&D3
&Q4
Modem operates in Asynchronous mode
and uses AT Command protocol; Hayes
AutoSync is enabled.
&D4
&D5
Controls On-Hook. Modem does not
disconnect until DTR lowered by DTE.
Controls Tx Mute. Transmitter output
muted when DTR is lowered.
&M231, &Q231 Modem operates in Asynchronous
mode; the DTE Dialer Type is disabled.
&M232, &Q232 Modem operates in Asynchronous
mode; V.25bis Async dialing is enabled.
&M233, &Q233 Modem operates in Synchronous
mode; V.25 Bisync dialing is enabled.
&M234, &Q234 Modem operates in Synchronous
mode; V.25bis HDLC dialing is enabled.
&M235, &Q235 Modem operates in Asynchronous
mode; AT&T Exclusive dialing is enabled.
&M236, &Q236 Modem operates in Synchronous
mode; the DTE Dialer Type is disabled.
&Fn
&F0
Loads Factory Configuration
Loads Async Dial factory configuration
options into Active (Operating)
configuration area.
Loads Sync Dial factory configuration
options into Active (Operating)
configuration area.
Loads Sync Leased (Answer Mode)
factory configuration options into Active
(Operating) configuration area.
Loads UNIX Dial factory configuration
options into Active (Operating)
configuration area.
Loads Sync Leased (Originate Mode)
factory configuration options into Active
(Operating) configuration area.
Cellular (Mobile). Valid only if ETC is
installed.
&F1
&F2
&F3
&F4
&F5
&Rn
&R0
RTS Action
Standard RS232. RTS action is
controlled by DTE.
&R1
Ignores RTS. Modem ignores RTS
signal and treats it as always ON.
19
AT COMMANDS (continued)
AT COMMANDS (continued)
&R2
Simulated Control Carrier. State of RTS
follows state of LSD.
&X2
Modem uses received signal as clock
source for synchronous data.
&Sn
&S0
&S1
DSR Control
&Zn=x
Modem stores telephone number x (and
any dial modifiers) in directory location n
(1–10). For example, the command
AT&Z1=555-1234 stores the number
5551234 in directory location 1. To clear
a telephone number from a memory
location, issue &Zn=x without entering a
telephone number.
Forced On. Forces DSR signal ON.
Standard RS232. Modem controls DSR
signal.
Wink When Disc. DSR signal turns Off
for approximately 1 to 2 seconds upon
disconnecting.
Follows DTR. Modem sends DSR to DTE
when it receives DTR from DTE.
On Early. DSR is Off when modem is in
idle state. DSR goes ON when modem
enters Data mode.
Delay to Data. DSR does not turn ON
until the modem enters Data mode.
Dial Backup toggle.
&S2
&S3
&S4
\An
\A0
\A1
\A2
\A3
\A4
\A5
Maximum Frame Size
64
128
192
256
32
&S5
&S6
16
&Tn
&T0
&T1
Tests
Stops any test in progress.
Starts a Local Analog Loopback test
(V.54, L3).
\Cn
\C0
Error Control Negotiate Buffer
Data is not buffered during
handshaking sequence.
&T2
Transmits and receives a 511 BERT
pattern.
\C1
\C2
Data is buffered up to 4 seconds during
handshaking sequence.
Data is not buffered during handshaking
sequence; however, the modem switches
to Buffer mode when it receives an error
control fallback character.
&T3
&T4
Starts a Local Digital Loopback test.
Accepts request from remote modem for
a Remote Digital Loopback test.
Denies request from remote modem for a
Remote Digital Loopback test.
Starts a Remote Digital Loopback test
(V.54, type L2).
Starts a Remote Digital Loopback test
with a Pattern (V.54, type L2).
Starts a Local Analog Loopback test
with a Pattern (V.54, type L3).
Starts a self-test.
&T5
&T6
&T7
&T8
&T9
\Dn
\D0
\D1
\D2
CTS Control
Forced On. CTS is forced ON.
Standard RS232 operation.
Wink When Disc. CTS turns Off for
approximately 1 to 2 seconds upon
disconnecting.
\D3
Follows DTR. The state of CTS follows
the state of DTR.
&Vn
&V0
View Configuration Options
Displays Active (Operating) configuration
options.
Displays Active (Saved) configuration
options.
Displays Customer 1 configuration
options.
Displays Customer 2 configuration
options.
\Gn
\G0
Modem-to-Modem Flow Control
Disables modem-to-modem flow
control.
&V1
&V2
&V3
&V4
\G1
\Kn
\K0
\K1
\K2
\K3
\K4
\K5
\K6
Enables modem-to-modem flow control.
Break Buffer Control, Send Break
Control, Break Forces Escape
Discards data, sends break before data,
and enables break forces escape.
Discards data, sends break before data,
and disables break forces escape.
Keeps data, sends break before data,
and enables break forces escape.
Keeps data, sends break before data,
and disables break forces escape.
Keeps data, sends data before break,
and enables break forces escape.
Keeps data, sends data before break,
and disables break forces escape.
Discards break, disables break forces
escape.
Displays telephone numbers stored in
directory locations 1–10.
&Wn
&W0
Write (Save to Memory)
Saves current configuration options in
Active (Operating) to Active (Saved).
Saves current configuration options in
Active (Operating) to Customer 1.
Saves current configuration options in
Active (Operating) to Customer 2.
&W1
&W2
&Xn
&X0
Transmit Clock Source
Modem provides internal clock source
for synchronous data (Pin 15).
Modem uses external source (Pin 24) for
clock for synchronous data.
&X1
\Nn
\N0
Error Control Mode
Buffer Mode. Modem does not use error
control; DTE rate can differ from VF rate.
20
AT COMMANDS (continued)
RESULT CODES
\N1
Direct Mode. Modem does not use error
control; DTE rate and VF rate must be
the same.
MNP or Disc. Modem disconnects if it
does not connect in MNP mode.
MNP or Buffer. Modem connects in
Buffer mode if it does not connect in MNP
mode.
V.42/MNP or Disc. Modem disconnects if
it does not connect in V.42 or MNP mode.
V.42/MNP or Buffer. Modem connects
in Buffer mode if it does not connect
in V.42 or MNP mode.
Numbers(1) Numbers(2) Words
0
1
2
3
4
0
1
2
3
4
OK
CONNECT
RING
NO CARRIER
ERROR
\N2
\N3
Result Codes 5–14, 16, 19 are enabled with the X1,
X2, X3, and X4 commands.
\N4
5
6
7
5
6
7
CONNECT 1200
NO DIALTONE
BUSY
\N5
8
8
NO ANSWER
\N6
\N7
LAPM or disconnect.
LAPM or buffer.
10
11
12
13
14
15
16
17
19
10
11
12
16
13
14
15
17
19
CONNECT 2400
CONNECT 4800
CONNECT 9600
CONNECT 12000
CONNECT 14400
CONNECT 19200
CONNECT 7200
CONNECT 16800
CONNECT 300
\Qn
Flow Control of DTE
\Q0, \Q5, \Q6
Disables flow control of DTE.
\Q1, \Q4 Enables XON/XOFF flow control.
\Q2, \Q3 Modem raises and lowers CTS to start
and stop flow control.
\Qn
\Q0, \Q2, \Q4
Disables flow control of modem.
Flow Control of Modem
Result Codes 20–27 are enabled with the X5
command (EC suffix) or the X6 command (V.42 or
MNP suffix).
\Q1, \Q5 Enables XON/XOFF flow control.
\Q3, \Q6 Modem starts and stops flow control
based upon state of DTE’s RTS signal.
20
21
22
23
24
25
26
27
29
10
11
12
16
13
17
15
5
CONNECT 2400/EC
CONNECT 4800/EC
CONNECT 9600/EC
CONNECT 12000/EC
CONNECT 14400/EC
CONNECT 16800/EC
CONNECT 7200/EC
CONNECT 1200/EC
CONNECT 19200/EC
\Tn
\T0
\Tn
No Data Disconnect Timer
Disables no data disconnect timer.
Sets no data disconnect timer to a value
from 1 minute to 255 minutes.
14
\Xn
XON/XOFF Passthrough
\X0
Disables transmission of flow control
characters to remote modem.
Enables transmission of flow control
characters to remote modem.
Result Codes 15, 28–34 are enabled with the X7
command (DTE rate suffix).
\X1
28
30
32
34
28
30
32
34
CONNECT 38400
CONNECT 57600
CONNECT 76800
CONNECT 115200
%An
%Bn
Sets error control fallback character n to
an ASCII value from 0 to 127.
Sets data rate to n (300 to 19200).
DIAL COMMAND MODIFIERS
%Cn
%C0
%C1
MNP 5 Data Compression
Disables MNP5 data compression.
Enables MNP5 data compression.
T
P
,
Tone Dial (DTMF)
Pulse Dial
Pause
%Rn
Sets DTE rate to n (300 to 115200).
W
R
@
!
Wait for Dial Tone
Reverse Dial
Quiet Answer
Hook Flash
IHn
IH0
IH1
V.42 bis Data Compression
Disables V.42bis data compression.
Enables V.42bis data compression for
transmit only.
;
Return to Command Mode
IH2
Enables V.42bis data compression for
receive only.
IH3
Enables V.42bis data compression
in both the transmit and receive
directions.
21
S-REGISTERS
Register
Description
Factory Setting
Range
S0
S2
Auto-Answer Ring Number
AT Escape Character
Carriage Return Character
Line Feed Character
1
43(+)
13
10
8
0(Disable) or 1–255 rings
0–127 ASCII
S3
0–127 ASCII
S4
0–127 ASCII
S5
Backspace Character
Blind Dial Pause
0–127 ASCII
S6
2
2–255 seconds
S7
No Answer Time-out
45
2
1–255 seconds
S8
“,” Pause Time for the Dial Modifier
No Carrier Disconnect
Escape Guard Time
0–255 seconds
S10
S12
S18
S26
S34
S35
S36
S37
S38
S39
S40
S41
2
0–254 (10ths of a second) or 255(Disable)
0–255 in 20-millisecond increments
0–255 seconds
50
Test Time-out
0(disabled)
RTS/CTS Delay
0
0
0
0
0
0
0–255 seconds
1800 Hz Training Tone
Auto Redial (Leased Line)
Rate Auto Originate
Auto Redial (DTR)
DTR Cont Repeat
0(Disable); 1(Enable)
0(Disable) or 1(dirs 1–2) – 9(dirs 1–10)
0(Disable) or 1(4800) – 6(16,800)
0(Dir 1) – 9(Dirs 1–10)
0=Disable, 1=Enable
0(Disable) or 1–255 seconds
0=Disable, 1=Enable
Receive Buffer Disconnect Delay
Auto Make Busy
0
0
Dial Line Rate
21
1=14400(V.32bis); 2=12000(V.32bis);
3=9600(V.32bis); 4=7200(V.32bis);
5=4800(V.32bis); 6=2400(V.22bis); 7=1200(V.22);
8=1200(212A); 10=0–300(V.21); 11=0–300(103J);
20=19200(V.32terbo); 21=16800(V.32terbo)
S43
S44
V.32bis Train
0
0=Long; 1=Short
Leased-Line Rate
18
1=14400(V.32bis); 2=12000(V.32bis);
3=9600(V.32bis); 4=7200(V.32bis);
5=4800(V.32bis); 6=2400(V22bis);
18=19200(V.32terbo); 19=16800(V.32terbo)
S45
S46
Leased TX Level
0
0
0 dBm–15 dBm
Bad Lines Auto Originate
0=Disable; 1=30 seconds; 2=20 seconds;
3=60 seconds; 4=90 seconds; 21=600 seconds
S47
Auto Dial Standby
0
0=Disable; 1=15 minutes; 2=1 hour; 3=4 hours;
255=Test(2min)
S48
S49
S51
S52
S53
Leased-Line Carrier On Level
Transmit Buffer Disconnect Delay
DTE RL (CT140)
0
10
0
0=–43 dBm; 1=–26 dBm
0=Disable or 1–255 in 1-second increments
0=Disable; 1=Enable
DTE LL (CT141)
0
0=Disable; 1=Enable
V.54 Address
0
0(Disable) or 1–34
22
S-REGISTERS (continued)
Register
Description
Factory Setting
Range
S54
S55
S56
V.54 Device Type
0
0
0=Peripheral; 1=Intermediate
0=Enable; 1=Disable
00–99
Access from Remote
Remote Access Password
1st and 2nd digits
00
S57
S58
S59
Remote Access Password
3rd and 4th digits
00
00
00
00–99
00–99
00–99
Remote Access Password
5th and 6th digits
Remote Access Password
7th and 8th digits
S61
S62
S63
S64
S65
CT111 Rate Control
V.25bis Coding
0
0
0
0=Disable; 1=Fallback 1; 2=Fallback 2
0=ASCII; 1=EBCDIC
V.25bis Idle Character
0=Mark; 1=Flag
V.25bis New Line Character
Line Current Disconnect
0
0
0=CR+LF; 1=CR; 2=LF
0=Enable (>8 msec); 1=Enable (>90 msec);
2=Disable
S66
NMS Call Messages
0
0=Call Connect & Progress; 1=Disable;
2=Call Connect Only; 3=Call Progress Only
S67
S69
S74
S75
S76
Directory Location 1 Callback
Make Busy Via DTR
0
0
0=Disable; 1=Enable
0=Disable; 1=Enable
0=Tributary; 1=Control
0–255 (001–256)
Network Position
0
Network Management Address
V.32bis Dial Autorate
255
0
0=Enable; 1=Disable; 2=Start at 4800 bps;
3=Start at 9600 bps
S77
S78
S80
S81
S82
S84
S85
S88
S89
S90
S91
S93
DTR Alarm Reporting
0
0
3
0
0
0
0
0
0
0
0
0
0=Disable; 1=Enable
V.32bis Dial Automode
No Data Disc Trigger Signal
Leased Line Signal Quality Retrain
V.32bis Leased Autorate
AT Command Mode
0=Enable; 1=Disable; 2=System85
0=RX or TX; 1=TX; 2=RX; 3=TX and RX
0(Disable) or 1–5 seconds
0=Enable; 1=Disable
0=Normal; 1=No Error; 2=No Strap or ERROR
0=Disable; 1=Enable
Fast Disconnect
Straps When Disconnected
V.42 ARQ Window Size Increase
DTE Rate = VF Rate
0=No Change; 1=Reload; 2=Reload, No Change
0(6 frames) – 9(15 frames)
0=Disable; 1=Enable
Cellular Enhancements
RJ11 Cellular Adapt
0=Disable; 1=Enable
0=Disable; 1=Enable
23
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