Voice Call Origination - Nortel Meridian M3905 User Manual

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 channel to transmit or receive
high speed data. Below is the pinout list to connect the second channel.
TxD
RxD
Gnd
Note: The VCO baud rate is 2400.
36
RS-232 pin
14
16
7
V.35 Pin
18
21
7