Configuring and Troubleshooting Modems

Modem Settings for Use in Strings

Modem Troubleshooting Tips

Sample Modem Scripts

Configuring and Troubleshooting Modems

This appendix contains information to help you to set modem strings and troubleshoot your modem connections to Cisco routers. For information about configuring lines to support modems, refer to the chapters in the part "Modem Configuration and Management" in the Cisco IOS Dial Services Configuration Guide: Terminal Services publication.

Modem Settings for Use in Strings

Table 143 contains required settings and error compression (EC) and compression settings for specific modem types. Use this information to create your modem scripts. Table 144 contains information for setting AUX ports and general comments. Refer to Table 145 for a legend of symbols used in these two tables.

Settings Required for All Modems	Settings for EC/Compression
Modem	FD	AA	CD	DTR	RTS/CTS Flow	LOCK DTE Speed	Best Error	Best Comp	No Error	No Comp
Codex 3260	&F	S0=1	&C1	&D3	*FL3	*SC1	*SM3	*DC1	*SM1	*DC0
USR Courier USR Sportster	&F	S0=1	&C1	&D3	&H1&R2	&B1	&M4	&K1	&M0	&K0
Global Village Teleport Gold	&F	S0=1	&C1	&D3	\Q3	\J0	\N7	%C1	\N0	%C0
Telebit T1600/T3000/WB	&F1	S0=1	&C1	&D3	S58=2 S68=2	S51=6	S180=2 S181=1	S190=1	S180=0 S181=1	S190=0
Telebit T2500 (ECM)	&F	S0=1	&C1	&D3	S58=2 S68=2	S51=6	S95=2	S98=1 S96=1	S95=0	S98=0 S96=0
Telebit Trailblazer	&F	S0=1	&C1
AT&T Paradyne Dataport	&F	S0=1	&C1	&D3	\Q3	--->	\N7	%C1	\N0	%C0
Hayes modems Accura/ Optima	&F	S0=1	&C1	&D3	&K3	&Q6	&Q5	&Q9	&Q6	<---
Microcom QX4232 series	&F	S0=1	&C1	&D3	\Q3	\J0	\N6	%C1	\N0	%C0
Motorola UDS FastTalk II	&F	S0=1	&C1	&D3	\Q3	\J0	\N6	%C1	\N0	%C0
Multitech MT1432 MT932	&F	S0=1	&C1	&D3	&E4	$BA0	&E1	&E15	&E0	&E14
Digicom Scout Plus	&F	S0=1	&C1	&D3	*F3	*S1	*E9	<---	*E0	<---
Digicom SoftModem	&F	S0=1	&C1	&D3	&K3	--->	\N5	%C1	\N0	%C0
Viva 14.4/9642c	&F	S0=1	&C1	&D3	&K3	--->	\N3	%M3	\N0	%M0
ZyXel U-1496E	&F	S0=1	&C1	&D3	&H3	&B1	&K4	<---	&K0	<---
Supra V.32bis/28.8	&F	S0=1	&C1	&D3	&K3	--->	\N3	%C1	\N0	%C0
ZOOM 14.4	&F	S0=1	&C1	&D3	&K3	--->	\N3	%C2	\N0	%C0
Intel External	&F	S0=1	&C1	&D3	\Q3	\J0	\N3	%C1"H3	\N0	%C0
Practical Peripherals	&F	S0=1	&C1	&D3	&K3	--->	&Q5	&Q9	&Q6	<---

Table 144: AUX and Platform Specific Settings

Modem Settings for Use with AUX Port Other Settings Comments

No Echo No Res CAB-MDCE Write Memory

Codex 3260

E0

Q1

&S1

&W

USR Courieræ
USR Sportster

E0

Q1

*NA*

&W

Global Village
Teleport Gold

E0

Q1

*NA*

&W

Telebit
T1600/T3000/WB

E0

Q1

&S4

&W

All Telebit modems need to have the speed set explicitly. These examples use 38400 bps. Using what Telebit calls "UNATTENDED ANSWER MODE" is the best place to start a dial in only modem.

Telebit
T2500 (ECM)

E0

Q1

&S1

&W

Telebit
Trailblazer

E0

Q1

*NA*

&W

Use "ENHANCED COMMAND MODE" on the T2500.

AT&T Paradyne Dataport

E0

Q1

*NA*

&W

Almost all Microcom modems have similar configuration parameters.

Hayes modems Accura/
Optima

E0

Q1

*NA*

&W

Microcom
QX4232 series

E0

Q1

*NA*

&W

Motorola UDS
FastTalk II

E0

Q1

*NA*

&W

Multitech
MT1432 MT932

E0

Q1

&S1

&W

Digicom
Scout Plus

E0

Q2

&B2

&W

Digicom
SoftModem

E0

Q1

&S1

&W

Viva
14.4/9642c

E0

Q1

&S1

&W

ZyXel
U-1496E

E0

Q1

&S1

&W

Additional information on ftp.zyxel.com

Supra
V.32bis/28.8

E0

Q1

&S1

&W

ZOOM
14.4

E0

Q1

&S1

&W

Intel
External

E0

Q1

*NA*

&W

Practical
Peripherals

E0

Q1

*NA*

&W

Based on PC288LCD. May vary.

Modem	Settings for Use with AUX Port	Other Settings	Comments
No Echo	No Res	CAB-MDCE	Write Memory
Codex 3260	E0	Q1	&S1	&W
USR Courieræ USR Sportster	E0	Q1	NA	&W
Global Village Teleport Gold	E0	Q1	NA	&W
Telebit T1600/T3000/WB	E0	Q1	&S4	&W	All Telebit modems need to have the speed set explicitly. These examples use 38400 bps. Using what Telebit calls "UNATTENDED ANSWER MODE" is the best place to start a dial in only modem.
Telebit T2500 (ECM)	E0	Q1	&S1	&W
Telebit Trailblazer	E0	Q1	NA	&W	Use "ENHANCED COMMAND MODE" on the T2500.
AT&T Paradyne Dataport	E0	Q1	NA	&W	Almost all Microcom modems have similar configuration parameters.
Hayes modems Accura/ Optima	E0	Q1	NA	&W
Microcom QX4232 series	E0	Q1	NA	&W
Motorola UDS FastTalk II	E0	Q1	NA	&W
Multitech MT1432 MT932	E0	Q1	&S1	&W
Digicom Scout Plus	E0	Q2	&B2	&W
Digicom SoftModem	E0	Q1	&S1	&W
Viva 14.4/9642c	E0	Q1	&S1	&W
ZyXel U-1496E	E0	Q1	&S1	&W	Additional information on ftp.zyxel.com
Supra V.32bis/28.8	E0	Q1	&S1	&W
ZOOM 14.4	E0	Q1	&S1	&W
Intel External	E0	Q1	NA	&W
Practical Peripherals	E0	Q1	NA	&W	Based on PC288LCD. May vary.

Table 145 contains a legend of symbols used in Table 143 and Table 144 .

Table 145: Legend to Symbols Used in Modem Chart

Symbol Meaning

*NA*

This option is not available on the noted modem.

-->

The command noted on the right will handle that function.

<--

The command on the left will handle that function.

AUX port

These parameters are only required for pre-9.21 AUX ports or any other port without modem control set.

Symbol	Meaning
NA	This option is not available on the noted modem.
-->	The command noted on the right will handle that function.
<--	The command on the left will handle that function.
AUX port	These parameters are only required for pre-9.21 AUX ports or any other port without modem control set.

Modem Troubleshooting Tips

Table 146 contains troubleshooting tips on modem access and control.

Table 146: Modem Troubleshooting Tips

Problem Likely Cause

Connection refused.

Someone already has a connection to that port

-or-

an XEC is running on that port

-or-

the modem failed to lower CD after a call disconnected, resulting in an EXEC that remained active after disconnect.

To force the line back into an idle state, clear the line from the console and try again. If it still fails, ensure that you have set modem inout command for that line. If you don't have modem control, either turn off EXEC on the line (by using the exec-timeout line configuration command) before making a reverse connection or configure the modem using an external terminal. As a last resort, disconnect the modem, clear the line, make the Telnet connection, and then attach the modem. The prevents a misconfigured modem from denying you line access.

Connection appears to hang.

Try entering "^U" (clear line), "^Q" (XON), and press Return a few times to try to establish terminal control.

EXEC does not come up, autoselect is on.

Press Return to enter EXEC.

Modem does not hang up after entering quit.

The modem is either not receiving DTR information, or you have not set up modem control on the router.

Interrupt another user's session when you dial in.

The modem is either not dropping CD on disconnect, or you have not set up modem control on the Cisco router.

Connection hangs after entering "+++" on the dialing modem, followed by an ATO.

The answering modem saw and interpreted the "+++" when it was echoed to you. This is a bug in the answering modem, common to many modems. There may be a switch to work around this problem; check the modem's documentation.

Losing data.

You may have Hardware Flow Control only on for either the router's line (DTE) or the modem (DCE). Hardware Flow Control should be on for both or off for both, but not for only one.

Using MDCE.

Turn MDCE into an MMOD by moving pin 6 to pin 8 because most modems use CD and not DSR to indicate the presence of carrier. You can also program some modems to provide carrier info via DSR.

Sample Modem Scripts

The following are several modem command strings that are appropriate for use with your access server or router. For use with the access server, Speed=xxxxxx is a suggested value only. Set the DTE speed of the modem to its maximum capability. By making a reverse Telnet connection in the EXEC mode to the port on the access server where the modem is connected, then sending an at command followed by a carriage return.

In the following example, the modem is attached to asynchronous interface 2 on the access server. The IP address indicated as the server-ip-address is the IP address of the Ethernet 0 interface. The administrator connects from the EXEC to asynchronous interface 2, which has its IP address assigned from Ethernet 0.

2511> telnet server-ip-address port-number
               192.156.154.42    2002

AST Premium Exec Internal Data/Fax (MNP 5)

Init=AT&F&C1&D3\G0\J0\N3\Q2S7=60S0=1&W
Speed=9600

ATi 9600etc/e (V.42bis)

Init=AT&FW2&B1&C1&D3&K3&Q6&U1S7=60S0=1&W
Speed=38400

AT&T Paradyne KeepInTouch Card Modem (V.42bis)

Init=AT&FX6&C1&D3\N7\Q2%C1S7=60S0=1&w
Speed=57600

AT&T ComSphere 3800 Series (V.42bis)

Init=AT&FX6&C1&D2\N5\Q2%C1"H3S7=60S0=1&W
Speed=57600

AT&T DataPort Fax Modem (V.42bis)

Init=AT&FX6&C1&D2\N7\Q2%C1S7=60S0=1&W
Speed=38400

Boca Modem 14.4K/V.32bis (V.42bis)

Init=AT&FW2&C1&D3&K3&Q5%C1\N3S7=60S36=7S46=138S95=47S0=1&W
Speed=57600

CALPAK MXE-9600

Init=AT&F&C1&D3S7=60S0=1&W
Speed=9600

Cardinal 2450MNP (MNP 5)

Init=AT&F&C1&D3\J0\N3\Q2\V1%C1S7=60S0=1&w
Speed=9600

Cardinal 9650V32 (MNP)

Init=AT&F&B1&C1&D3&H1&I1&M6S7=60S0=1&W

Cardinal 9600V42 (V.42bis)

Init=AT&FW2&C1&D3&K3&Q5\N3%C1%M3S7=60S46=138S48=7S95=3S0=1&W
Speed=38400

Cardinal 14400 (V.42bis)

Init=AT&F&C1&D3&K3&Q5\N3%C1%M3S7=60S46=138S48=7S95=47S0=1&W
Speed=57600

COMPAQ SpeedPAQ 144 (V.42bis)

Init=AT&F&C1&D3&K3&Q5\J0\N3%C1S7=60S36=7S46=2S48=7S95=47S0=1&W
Speed=57600

Data Race RediMODEM V.32/V.32bis

Init=AT&F&C1&D3&K3&Q6\J0\N7\Q3\V2%C1S7=60 Speed=38400S0=1&W

Dell NX20 Modem/Fax (MNP)

Init=AT&F&C1&D3%C1\J0\N3\Q3\V1W2S7=60S0=1&W
Speed=9600

Digicom Systems (DSI) 9624LE/9624PC (MNP 5)

Init=AT&F&C1&D3*E1*F3*S1S7=60S0=1&W

Digicom Systems (DSI) 9624LE+ (V.42bis)

Init=AT&F&C1&D3*E9*F3*N6*S1S7=60S0=1&W
Speed=38400

Everex Evercom 24+ and 24E+ (MNP 5)

Init=AT&F&C1&D3\J0\N3\Q2\V1%C1S7=60S0=1&W

Everex EverFax 24/96 and 24/96E (MNP 5)

Init=AT&F&C1&D3\J0\N3\Q2\V1%C1S7=60S0=1&W
Speed=9600

Everex Evercom 96+ and 96E+ (V.42bis)

Init=AT&FW2&C1&D3\J0\N3\Q2\V2%C1S7=60S0=1&W
Speed=38400

Freedom Series V.32bis Data/FAX Modem

Init=AT&F&C1&D3&K3&Q6\J0\N7\Q3\V2%C1S7=60S0=1&W
Speed=38400

Gateway 2000 TelePath

Init=AT&FW2&C1&D3&K3&Q5\N3%C1S7=60S36=7S46=138S48=7S95=47S0=1&W
Speed=38400

Gateway 2000 Nomad 9600 BPS Internal Modem

Init=AT&F&C1&D3%C1\J0\N3\Q2S7=60S0=1&W
Speed=38400

GVC SM-96V (V.42bis)

Init=AT&F&C1&D3%C1\J0\N6\Q2\V1S7=60S0=1&W
Speed=38400

GVC SM-144V (V.42bis)

Init=AT&F&C1&D3%C1\J0\N6\Q2\V1S7=60S0=1&W
Speed=57600

Hayes Smartmodem Optima 9600 (V.42bis)

Init=AT&FW2&C1&D3&K3&Q5S7=60S46=138S48=7S95=47S0=1&W
Speed=38400

Hayes Smartmodem Optima 14400 (V.42bis)

Init=AT&FW2&C1&D3&K3&Q5S7=60S46=138S48=7S95=47S0=1&W
Speed=57600

Hayes Optima 28800 (V.34)

Init=AT&FS0=1&C1&D3&K3&Q6&Q5&Q9&W
Speed=115200

Hayes V-series Smartmodem 9600/9600B (V.42)

Init=AT&F&C1&D3&K3&Q5S7=60S0=1&W
Speed=9600

Hayes V-series ULTRA Smartmodem 9600 (V.42bis)

Init=AT&F&C1&D3&K3&Q5S7=60S46=2S48=7S95=63S0=1&W
Speed=38400

Hayes V-series ULTRA Smartmodem 14400 (V.42bis)

Init=AT&FW2&C1&D3&K3&Q5S7=60S38=10S46=2S48=7S95=63S0=1&W
Speed=38400

Hayes ACCURA 24 EC (V.42bis)

Init=AT&FW2&C1&D3&K3&Q5S7=60S36=7S46=138S48=7S95=47S0=1&W

Hayes ACCURA 96 EC (V.42bis)

Init=AT&FW2&C1&D3&K3&Q5S7=60S36=7S46=138S48=7S95=47S0=1&W
Speed=38400

Hayes ACCURA 144 EC (V.42bis)

Init=AT&FW2&C1&D3&K3&Q5S7=60S36=7S46=138S48=7S95=47S0=1&W
Speed=57600

Hayes ISDN System Adapter

Init=AT&FW1&C1&D3&K3&Q0S7=60S0=1&W
Speed=57600

IBM 7855 Modem Model 10 (MNP)

Init=AT&F&C1&D3\N3\Q2\V1%C1S7=60S0=1&W

IBM Data/Fax Modem PCMCIA (V.42bis)

Init=AT&F&C1&D3&K3&Q5%C3\N3S7=60S38=7S46=138S48=7S95=47S0=1&W
Speed=57600

Identity ID9632E

Init=AT&F&C1&D3S7=60S0=1&W
Speed=9600

Infotel V.42X (V.42bis)

Init=AT&F&C1&D3S7=30S36=7S0=1&W
Speed=9600

Infotel V.32 turbo (V.42bis)

Init=AT&FW1&C1&D3&K3&Q5S7=60S0=1&w
Speed=38400

Infotel 144I (V.42bis)

Init=AT&F&C1&D3&K3&Q5\N3%C1S7=60S36=7S46=138S48=7S95=47S0=1&W
Speed=38400

Intel 9600 EX (V.42bis)

Init=AT&F&C1&D3\J0\N3\Q2\V2%C1"H3S7=60S0=1&W
Speed=38400

Intel 14400 EX (V.42bis)

Init=AT&F&C1&D3\J0\N3\Q2\V2%C1"H3S7=60S0=1&W
Speed=38400

Macronix MaxFax 9624LT-S

Init=AT&F&C1&D3&K3&Q9\J0\N3\Q3%C1S7=60S36=7S46=138S48=7S95=47S0=1&W
Speed=9600

Megahertz T3144 internal (V.42bis)

Init=AT&F&C1&D3%C1\J0\N3\Q2\V2S7=60S0=1&W
Speed=57600

Megahertz T324FM internal (V.42bis)

Init=AT&F&C1&D3%C1\J0\N3\Q2\V1S7=60S46=138S48=7S0=1&W
Speed=9600

Megahertz P2144 FAX/Modem (V.42bis)

Init=AT&F&C1&D3%C1\J0\N7\Q2\V2S7=60S0=1&W
Speed=38400

Megahertz T396FM internal (V.42bis)

Init=AT&FW2&C1&D3%C1\J0\N7\Q2\V2S7=60S0=1&W
Speed=38400

Megahertz CC3144 PCMCIA card modem (V.42bis)

Init=AT&F&C1&D3&K3&Q5%C3\N3S7=60S38=7S46=138S48=7S95=47S0=1&W
Speed=57600

Microcom AX/9624c (MNP 5)

Init=AT&F&C1&D3\G0\J0\N3\Q2%C1S7=60S0=1&W
Speed=9600

Microcom AX/9600 Plus (MNP 5)

Init=AT&F&C1&D3\J0\N3\Q2S7=60S0=1&W

Microcom QX/V.32c (MNP 5)

Init=AT&F&C1&D3\J0%C3\N3\Q2S7=60S0=1&W
Speed=38400

Microcom QX/4232hs (V.42bis)

Init=AT&F&C1&D3\J0%C3\N3\Q2-K0\V2S7=60S0=1&W
Speed=38400

Microcom QX/4232bis (V.42bis)

Init=AT&F&C1&D3\J0%C3\N3\Q2-K0\V2W2S7=60S0=1&W
Speed=38400

Microcom Deskporte 28800 (V.34)

Init=AT&F&c1&q1E0S0=1&W
Speed=115200

Microcom MicroPorte 542 (V.42bis)

Init=AT&F&C1&D3&Q5S7=60S46=138S48=7S95=47S0=1&W
Speed=9600

Microcom MicroPorte 1042 (V.42bis)

Init=AT&F&C1&D3%C3\J0-M0\N6\Q2\V2S7=60S0=1&W
Speed=9600

Microcom MicroPorte 4232bis (V.42bis)

Init=AT&F&C1&D3%C3%G0\J0-M0\N6\Q2\V2S7=60S0=1&W
Speed=38400

Microcom DeskPorte FAST

Init=ATX4S7=60-M1\V4\N2L1S0=1&W
Speed=57600

Motorola/Codex 3220 (MNP)

Init=AT&F&C1&D3*DC1*FL3*MF0*SM3*XC2S7=60S0=1&W

Motorola/Codex 3220 Plus (V.42bis)

Init=AT&F&C1&D3*DC1*EC0*MF0*SM3*XC2S7=60S0=1&W
Speed=38400

Motorola/Codex 326X Series (V.42bis)

Init=AT&F&C1&D3*FL3*MF0*SM3*TT2*XC2S7=60S0=1&W
Speed=38400

MultiTech MultiModem V32EC (V.42bis)

Init=AT&FX4&C1&D3$BA0&E1&E4&E15#L0S7=60S0=1&W
Speed=38400

MultiTech MultiModem V32 (no MNP or V.42)

Init=AT&F&C1&D3S7=60S0=1&W
Speed=9600

MultiTech MultiModem 696E (MNP)

Init=AT&F&C1&D3$BA0&E1&E4&E15S7=60S0=1&W

MultiTech MultiModem II MT932 (V.42bis)

Init=AT&FX4&C1&D3$BA0&E1&E4&E15#L0S7=60S0=1&W
Speed=38400

MultiTech MultiModem II MT1432 (V.42bis)

Init=AT&FX4&C1&D3#A0$BA0&E1&E4&E15#L0S7=60S0=1&W
Speed=57600

NEC UltraLite 14.4 Data/Fax Modem (V.42bis)

Init=AT&F&C1&D3&K3&Q4\J0\N7\Q2W2%C1S7=60S0=1&W
Speed=38400

Practical Peripherals PC28800SA (V.42bis)

Init=AT&F&C1&D3&K3&Q5S7=60S36=7S46=2S48=7S95=47S0=1&W
Speed=115200

Practical Peripherals PM9600SA (V.42bis)

Init=AT&F&C1&D3&K3&Q5S46=138S48=7S7=60S0=1&W
Speed=38400

Practical Peripherals PM14400FX (V.42bis)

Init=AT&F&C1&D3&K3&Q5S7=60S36=7S46=2S48=7S95=47S0=1&W
Speed=57600

Practical Peripherals PM14400SA (V.42bis)

Init=AT&F&C1&D3&K3&Q5S7=60S36=7S46=2S48=7S95=47S0=1&W
Speed=57600

Prometheus ProModem 9600 Plus (V.42)

Init=AT&F&C1&D3*E7*F3S7=60S0=1&W

Prometheus ProModem Ultima (V.42bis)

Init=AT&F&C1&D3*E9*F3*N6*S1S7=60S0=1&W
Speed=38400

Racal Datacomm ALM 3223 (V.42bis)

Init=AT&F&C1&D3\M0\N3\P2\Q1\V1S7=60S0=1&W
Speed=38400

Supra FAXModem V.32bis (V.42bis)

Init=AT&FN1W2&C1&D1&K3&Q5\N3%C1S7=60S36=7S48=7S95=45S0=1&W
Speed=57600

Telebit T1600 (V.42bis)

Init=AT&FX2&C1&D3&R3S7=60S51=6S58=0S59=15S68=2S180=2S190=1S0=1&W
Speed=38400

Telebit T2500 (V.42bis)

Init=AT~&FX2S7=60S51=5S52=2S66=1S68=2S97=1S98=3S106=1S131=1S0=1&W
 
Telebit T3000 (V.42bis)
Init=AT&FX2&C1&D3S51=6S59=7S68=2S7=60S0=1&W
Speed=38400

Telebit QBlazer (V.42bis)

Init=AT&FX2&C1&D3S59=7S68=2S7=60S0=1&W
Speed=38400

Texas Instruments V.32bis Internal Modem

Init=AT&F&C1&D3%C1\J0\N7\Q2\V2S7=60S0=1&W
Speed=38400

Toshiba T24/DF Internal

Init=AT&F&C1&D3\J0\N3\Q2%C1S7=60S36=7S46=138S48=7S0=1&W
Speed=9600

Universal Data Systems FasTalk V.32/42b (V.42bis)

Init=AT&F&C1&D3\J0\M0\N7\V1\Q2%C1S7=60S0=1&W
Speed=38400

Universal Data Systems V.32 (no MNP or V.42)

Init=AT&F&C1&D2S7=60S0=1&W
Speed=9600

Universal Data Systems V.3224 (MNP 4)

Init=AT&F&C1&D2\J0\N3\Q2S7=60S0=1&W

Universal Data Systems V.3225 (MNP 5)

Init=AT&F&C1&D2\J0\N3\Q2%C1S7=60S0=1&W

Universal Data Systems V.3227 (V.42bis)

Init=AT&F&C1&D2\J0\M0\N7\Q2%C1S7=60S0=1&W
Speed=38400

Universal Data Systems V.3229 (V.42bis)

Init=AT&F&C1&D3\J0\M0\N7\Q2%C1S7=60S0=1&W
Speed=38400

US Robotics Sportster 9600 (V.42bis)

Init=AT&FX4&A3&B1&D3&H1&I0&K1&M4S7=60S0=1&W
Speed=38400

US Robotics Sportster 14400 (V.42bis)

Init=AT&FX4&A3&B1&D3&H1&I0&K1&M4S7=60S0=1&W
Speed=57600

US Robotics Sportster 14400 (V.42bis) x

Init=AT&FX4&B1&C1&D2&H1&K1&M4E0X7Q0V1S0=1&W
Speed=57600

US Robotics Sportster 28800 (V.34)

Init=AT&FS0=1&C1&D2&H1&R2&N14&B1&W
Speed=115200

US Robotics Courier 28800 (V.34)

Init=AT&FS0=1&C1&D2&H1&R2&N14&B1&W
Speed=115200

US Robotics Courier V.32bis (V.42bis)

Init=AT&FX4&A3&C1&D2&M4&H1&K1&B1S0=1&W
Speed=38400

US Robotics Courier HST Dual Standard (V.42bis)

Init=AT&FB0X4&A3&C1&D2&M4&H1&K1&B1&R2&S1S0=1&W
Speed=115200

US Robotics Courier HST (V.42bis)

Init=AT&FB0X4&A3&C1&D2&M1&H1&K1&B1S0=1&W
Speed=115200

US Robotics WorldPort 2496 FAX/Data (V.42bis)

Init=AT&FX4&C1&D3%C1"H3\J0-J1\N3\Q2\V2S7=60S0=1&W
Speed=57600

US Robotics WorldPort 9696 FAX/Data (MNP 5)

Init=AT&FX4&C1&D3%C1\J0\N3\Q2\V2S7=60S0=1&W

US Robotics WorldPort 9600 (MNP 5)

Init=AT&FX4&C1&D3%C1\J0\N3\Q2\V2S7=60S0=1&W

US Robotics WorldPort 14400 (V.42bis)

Init=AT&FX4&A3&B1&C1&D3&H1&K1&M4S7=60S0=1&W
Speed=57600

Ven-Tel PCM 9600 Plus (MNP)

Init=AT&FB0&C1&D3\N3\Q3%B0%C1%F1S7=60S0=1&W

ViVa 9642e (V.42bis)

Init=AT&F&C1&D3&K3&Q5\N3%C3S7=60S36=7S46=138S48=7S95=47S0=1&W
Speed=38400

ViVa 14.4/FAX (V.42bis)

Init=AT&F&C1&D3&K3&Q5\N3%C3S7=60S36=7S46=138S48=7S95=47S0=1&W
Speed=38400

ZOOM V.32 turbo (V.42bis)

Init=AT&FW1&C1&D3&K3&Q5%C1\N3S7=60S36=7S46=138S48=7S95=47S0=1&W
Speed=38400

ZOOM V.32bis (V.42bis)

Init=AT&FW1&C1&D3&K3&Q9%C1\N3S7=60S36=7S95=47S0=1&W
Speed=38400

Zyxel U-1496 (V.42bis)

Init=AT&FX6&B1&C1&D2&N0&K4&H3S7=60S0=1&W
Speed=57600

Problem	Likely Cause
Connection refused.	Someone already has a connection to that port -or- an XEC is running on that port -or- the modem failed to lower CD after a call disconnected, resulting in an EXEC that remained active after disconnect. To force the line back into an idle state, clear the line from the console and try again. If it still fails, ensure that you have set modem inout command for that line. If you don't have modem control, either turn off EXEC on the line (by using the exec-timeout line configuration command) before making a reverse connection or configure the modem using an external terminal. As a last resort, disconnect the modem, clear the line, make the Telnet connection, and then attach the modem. The prevents a misconfigured modem from denying you line access.
Connection appears to hang.	Try entering "^U" (clear line), "^Q" (XON), and press Return a few times to try to establish terminal control.
EXEC does not come up, autoselect is on.	Press Return to enter EXEC.
Modem does not hang up after entering quit.	The modem is either not receiving DTR information, or you have not set up modem control on the router.
Interrupt another user's session when you dial in.	The modem is either not dropping CD on disconnect, or you have not set up modem control on the Cisco router.
Connection hangs after entering "+++" on the dialing modem, followed by an ATO.	The answering modem saw and interpreted the "+++" when it was echoed to you. This is a bug in the answering modem, common to many modems. There may be a switch to work around this problem; check the modem's documentation.
Losing data.	You may have Hardware Flow Control only on for either the router's line (DTE) or the modem (DCE). Hardware Flow Control should be on for both or off for both, but not for only one.
Using MDCE.	Turn MDCE into an MMOD by moving pin 6 to pin 8 because most modems use CD and not DSR to indicate the presence of carrier. You can also program some modems to provide carrier info via DSR.

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