Nortel Networks M3905 Voice call origination

Additional asynchronous features

Voice call origination

By using a special cable, the MCA can communicate with two DTEs at the same

time. The primary channel is the main communication channel offering MCA

features. The second channel can respond to Voice Call Origination commands

(VCO) only. This provides the ability to make a voice call across the second

channel while simultaneously using the primary channe l to transmit or receive

high speed data. Below is the pinout list to connec t the second channel.

Note: The VCO baud rate is 2400.

RS-232 pin V.35 Pin

TxD 14 18

RxD 16 21

Gnd 7 7

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