Nortel Networks M3905

Asynchronous troubleshooting

MCA does not operate at

all. 1. Check the LED in the back of the telephone to see if it is flashing. If

the LED is steadily lit, the MCA needs to be

configured in your system, or the MCA is not functioning correctly.

If the LED is not lit, the MCA requires external power.

2. Make sure the cable from your terminal or PC is connected to the

MCA.

- Check the data parameters for your display.

- Make sure the transformer is plugged in, or the closet

power is connected.

- Make sure the cable between the MCA and your tele-

phone is connected and is crimped.

Symptom Solution

Contents

Main Page Introduction 1 Dialing methods 3 Make a data call 4 Keyboard dialing 9 AT dialing 18 S-registers 22 Page Page Introduction Introduction About the document Before you use the MCA Introduction Use the MCA to make data calls Dialing methods Dialing methods Switching between keyboard and AT dialing Make a data call Keyboard dialing AT d ial ing Keypad dialing / Release a data call / Default parameters for Asynchronous and Synchronous Keyboard dialing menus Page Keyboard dialing Abort current command Auto Dial Speed Call Script File Script File directory Delete Script File Escape code Manual answer (asynchronous) Remote Loopback Ring Again Ring Again (synchronous) Display parameters (asynchronous) AT dialing A/ (repeat last command) ATA (answer) ATCn (carrier detect enable/disable, where n = 0, 1) ATDxxxx (dial, where x = 09) ATOn (on-line, where n = 0, 1) ATQn (result code, wheren=0,1) ATV n (verbal result, where n = 0, 1) ATXn (result code selection, where n = 04) Page Page AT&Yn (recall user profile on power-up, where n = 0, 1) S-registers ATS n=x ATS n? S0 (number of rings incoming; range = 0255) Page Page Dial modifier Introduction to Keypad dialing Keypad dialing / Page Page MCA Data Parameters for Keypad dialing commands / Keypad dialing commands 32 MCA parameter Keypad dialing notes MCA Command number 33 MCA parameter Keypad dialing notes MCA Command number Additional asynchronous features Autobaud Autoparity Modem Pooling Additional synchronous information Parity and character length on the MCA Voice call origination Asynchronous troubleshooting Modem pooling Power failure Troubleshooting symptoms and solutions 38 Symptom Solution