3Com Courier Reference page 153

Register Default Function
1
2
3
Enabling local-access password protection disables the &Zn=s command (which stores up to 10
phone numbers) because stored phone numbers occupy the same space in NVRAM as the
dialback numbers for Dial Security accounts.
S54 64 Symbol rate bit-mapped register used primarily by 3Com Technical
Support for debugging purposes.
Bit
0
1
2
3
4
5
6
7
S55 0 Trellis code bit-mapped register used primarily by 3Com Technical
Support for debugging purposes.
Bit
0
1
2
3
7
S56 0 Bit-mapped register primarily used by 3Com Technical Support for
debugging purposes.
Bit
0
1
2 Prompting enabled.
4 Local-access password protection
enabled.
8 DTMF security enabled.
Value Result
1 Disable 2400 symbol rate.
2 Disable 2743 symbol rate.
4 Disable 2800 symbol rate.
8 Disable 3000 symbol rate.
16 Disable 3200 symbol rate.
32 Disable 3429 symbol rate.
64 Disable Call Indicate (CI).
128 Disable V.8.
Value Result
1 Disable 8S-2D mapping.
2 Disable 16S-4D mapping.
4 Disable 32S-2D mapping.
8 Disable 64S-4D mapping.
128 Enable phase roll detection
Value Result
1 Disable non-linear coding.
2 Disable TX level deviation.
A complete list of S-Registers
A-11