Specifications

Troubleshooting Guide 8-15

Did either “0” or “OK” display?

Call Cabletron Technical Support.

Program the modem. Depending on the modem used, the commands to program the modem parameters may be

different. Table 8-2 lists the modem parameters and the associated commands according to two of the more widely

used modems, Hayes AT and US Robotics. For programming information about other modems, refer to the

associated documentation.

Write the commands to the modem NVRAM. This is usually done using the AT&W command. (Refer to your

modem documentation for further instructions.)

Stop the Telnet session by pressing CTRL -]

In the Admin Mode, set the port back to CLI Mode.

Example:

port 16

set port mode cli

reset 16

Try dialing in again.

Was the dial-in successful?

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Congratulations, the problem is solved.

With the CSMIM2 in the Admin Mode, enter the commands (example is for port 16):

port 16

show port

The port parameters are displayed. In this example, it is the port 16 parameters.

Check for the following:

- Autobaud is set to N.

- Port speed is set as high as possible. The highest port speed is dependent on the modem (refer to the modem manual for

the maximum speed) and the CSMIM software revision. For MicroCS, MODMIM, and CSMIM2 with rev. 8.1.1, the

maximum speed is 57600 bps; with rev. 9.0 or greater, the maximum speed is 115200 bps. The CSMIM maximum speed

is hardware set to 38400 bps and the CSMIM-T1 maximum speed is 115200.

It is recommended that you set the CSMIM2 to its maximum port speed and then set the modem speed accordingly. Set the

DTE line of the modem so that it runs at a fixed rate.

(continue)

Table 8-2. Modem Settings for High Speed (V.32, V.42) Type Links

Parameters Hayes AT US Robotics

CTS/RTS (hardware) ﬂow control &K3 &R2&H1

Hang up, disconnect, and reset on loss of DTR &D3 &D2

DCD following Carrier Detect &C1 &C1

DSR always forced on &S0 &S0

Echo Commands E1 E1

Numeric result codes V0 V0

Result codes on originated calls only Q2 Q2

Auto answer on S0=1 S0=1

V.42 bis compression S46=138 &B1&K2

V.42 error correction &Q9

Dial time-out of 60 seconds S7=60 S7=60