Multi-Tech Systems ISIHP-4U, ISIHP-4S manual Terminal adapter dials but cannot make a connection

Troubleshooting

other device. Or, select the port the conflicting device is on and change it instead. If you need to open your computer to change switches or jumpers on the conflicting device, refer to the your computer’s documentation.

•The serial port may be defective. If you have another serial port, install the TA on it, change the COM port setting in your software, and try again.

•The TA may be defective. Call Tech Support for assistance (see Chapter 6).

The terminal adapter dials but cannot make a connection

Possible be several reasons the TA fails to make a connection include:

•Lack of a proper physical connection to the communication line

•A busy signal

•A wrong number

•No terminal adapter at the other end

•A faulty communications device, computer, or software at the other end

•Incompatibility between communications devices

•An improperly configured ISIHP-2S/2U/4S/4U TA

Narrow the list of possibilities by using extended result codes. To enable them, enter ATV1X2 and press ENTER while in terminal mode or include V1X2 in the TA ’s initialization string (V1X2 is enabled by default). When you dial again, the TA reports the call’s progress.

•If the modem/TA reports BUSY, the other number may be busy. Try again later.

•If the TA reports NO CARRIER, no connection was made. You may have dialed the correct number, but the other computer or software was turned off or faulty. Check the number and try again or try calling another system to make sure your TA is working. Also, check that you accurately configured the TA with the correct switch type, TEIs, data protocols, and other parameters needed for a successful

144 MultiModemISI Hybrid Series, ISIHP-2S/2U/4S/4U/4SD