Cabletron Systems CSMIM-T1 - Manual (Page 171)

Registers
CSMIM-T1 Hardware Installation Guide 7-45
S11= n DTMF Tone Dialing Speed
Range: 50 - 100 milliseconds
Default: 75 milliseconds
Sets the length of time after the last tone and before the next
tone is sent when the modem is dialing over a touch tone line.
The modem does not store this register with &W; enter *W to save it.
S12= n Escape Code Guard Time
Range: 0 - 255 (fiftieths of a second)
Default: 50 (1 second)
Sets the minimum “quiet” time that must be present before and
after entering the escape code. The delay between each
character in the escape code must be less than this guard time.
If register S12 is set to 0, the time it takes to enter the escape
code does not affect recognition.
S14= n Bit Mapped Register
The modem saves the following command settings when you
enter them. You do not need to enter &W or *W .
NOTES
The modem does not store this register with &W; enter *W to
save it.
Register S12 sets the guard time that precedes and follows the
attention character sequence. It should be set to the same
value on both the originating and answering modems.