S8 (Pause Time For Comma; Range = 0-255); S12 (Escape Code Guard Time; Range = 0-255); S52, S53, S54 (Product Code Response); S66 (At/Kbd Autobaud Interpretation; Range = 0, 1) - Nortel Meridian M3905 User Manual

S-registers
S8 (pause time for comma; range = 0–255)
A comma included in the dialing sequence is interpreted as a delay. The default
delay time is two seconds.
S12 (escape code guard time; range = 0–255)
The guard time aids in recognition of the escape sequence, useful since different
numbers of escape characters mean different things. For example, one Escape
character is not recognized as a pause until the guard timer expires, indicating no
other Escape characters were entered as part of the Escape sequence.
This holds the value of the guard time in milliseconds. The value of each digit is 20
milliseconds. The default value is 50 (one second).

S52, S53, S54 (product code response)

These registers contain the Product Identification code and will output a three digit
code in response to the "ATI0" command.
Default value is "960" (Smartmodem V-series 9600 modem). Other possible
values are: "122" (Smartmodem 1200) and "240" (Smartmodem 2400). These
registers will not be altered by software reset.

S66 (AT/KBD autobaud interpretation; range = 0, 1)

A value of zero (0) means only Hayes autobaud is possible. A value of one (1)
means both Hayes and keyboard dialing autobaud is allowed.
S51 (delay until modem pool activation; range = 0–255)
Each increment of S51 represents a 0.25 second delay before outbound modem
pool activation. Default is 16 (4 seconds). This register will not be altered by
software reset.
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