Implementing The P66 Command - Nortel Meridian SL-100 Reference Manual

If only a carriage return (0DH) is entered, the Nortel KBD becomes
active with only an autobaud performed. For more information about
Nortel KBD, refer to Chapter 8, "Nortel keyboard dialing".
If AT, at, A/, or a/ is entered, Hayes keyboard dialing becomes active
with an autobaud and autoparity performed. All other characters are
ignored within the autobaud state.
Parameter S66 register (zero)
If the S66 register contains a zero value (Hayes keyboard dialing), the
autobauding operates as follows:
If a carriage return (0DH) is entered, it is echoed to the DTE.
Note: An autobaud is performed with the carriage return, but you
remain in the command state.
If AT, at, A/, or a/ is entered, Hayes keyboard dialing becomes active
with an autobaud and autoparity performed. All other characters are
ignored within the command state.
Incoming calls activate the most recently used keyboard dialing method.
The prompts are transmitted at the previously detected data (baud) rate. At
that time the proper incoming call prompt is displayed. If the data rate of the
DTE is changed but no autobaud has occurred between the time the DTE
was changed and the arrival of the incoming call message, the prompts are
transmitted at an incompatible data rate.
The MCA does not have a previous data rate if it has not been autobauded
since power up or since the line had maintenance performed on it. If the
MCA has no previous data rate stored, the incoming call prompt is
transmitted at the baud rate that was sent in the operating parameter
download. You may change this rate by using the P22 command. This
action saves your desired baud rate in the event of power loss. If the DTE is
not set to that data rate, garbage may be displayed.

Implementing the P66 command

The P66 command contains the initial screen and four scrolling screens that
enable you to select which type of modem the MCA can emulate. The
product code with respect to each modem emulation is automatically setup.
Unless otherwise requested, the screens are presented on the set display as
shown in Table 9-1.
Meridian SuperNode MSL-100 Meridian Modular Telephones Reference Manual MSL11
Hayes keyboard dialing 9-3