A-7
1015N-2MFM-1A
Appendix A
“AT”COMMANDS and “S” REGISTERS
EXCLUSIVE TO THE PE2400
“S” Registers
Notes:
*This S-Register is stored in the modem NVRAM upon receipt of the &W command so that
the contents are preserved when modem power is removed.
Register
Range
Units
Default
Description
S17
0-250
4 ms
00
Fax Mode Null Byte Timer
increments
S20
0-127
seconds
00
Fax Mode Inactivity Timer
S22*
Bit
none 76 hex
Bit Mapped Options Register
Mapped
