Mca Operational Modes; Autobaud And Autoparity - Nortel Meridian SL-100 Reference Manual

If the user toggles from Nortel KBD to Hayes keyboard dialing, then Nortel
KBD is disabled. The user still has access to Nortel KBD menus; however,
when the user exits from the menus, the user is locked out of Nortel KBD.
To return to Nortel KBD, the P66 command must be entered, and Nortel
KBD must be reselected.

MCA operational modes

While in Nortel KBD mode, the MCA operates in one of three modes:
After initializing the MCA, the autobaud mode becomes active. The user
remains in the autobaud mode until an acceptable autobaud character is
entered.
Nortel KBD is activated by entering a period "." followed by a carriage
return (CR), ENTER, or RETURN. When the Nortel KBD state is active,
the MCA returns to the command mode at the completion of any call
origination attempt. AT commands can be issued in autobaud mode to place
the MCA into the Hayes keyboard dialing state. For information on Hayes
keyboard dialing, refer to Chapter 9, "Hayes keyboard dialing".

Autobaud and autoparity

The MCA uses an autobaud and autoparity feature to automatically detect
the speed and parity of the attached terminal. The baud rate and parity are
detected by entering AT and a CR while in Hayes keyboard dialing or
entering a period "." and CR while in Nortel KBD. The default rate is 9600
bytes/s during power-up. After the MCA has been set to a new speed, it
retains that speed until either another autobaud takes place or a power-off
occurs.
The default parity is a space and may be changed by the user when
datafilling tables. The user may change the parity by entering AT and a
carriage return (CR) while in Hayes keyboard dialing or entering a period
and CR while in Nortel KBD. In the data transfer mode, the parity bit is
padded transparently as data for 7 bit codes.
When the user is in the Nortel KBD state, the MCA returns to the autobaud
mode at the completion of any call origination attempt. Also, when the user
is in Nortel KBD state, an AT command can be in autobaud mode to place
the MCA into Hayes keyboard dialing state. For information on Hayes
keyboard dialing, refer to Chapter 9, "Hayes keyboard dialing".
Meridian SuperNode MSL-100 Meridian Modular Telephones Reference Manual MSL11
autobaud
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Nortel keyboard dialing 8-5