USRobotics 3Com instruction

8 Default time

255Disable all connections except V.32 9600bps

S29 * V.21/V.23 Fallback timer (20)

S30 * Reserved

S31 * TAD Audio level adjust (128)

S32 * Bit mapped (16)

1V.8 Call Indicate enable

2Enable V.8 mode

4Disable V.FC modulation

8Disable V.34 modulation

16Disable V.34bis modulation

32Disable X2

64Disable V.90

128Reserved

S33 * Bit mapped (0)

1Disable 2400 Symbol rate

2Disable 2743 Symbol rate

4Disable 2800 Symbol rate

8Disable 3000 Symbol rate

16Disable 3200 Symbol rate

32Disable 3429 Symbol rate

64Reserved

128Disable Shaping

S34 * Bit mapped (0)

1Disable 8S-2D trellis encoding

2Disable 16S-4D trellis encoding

4Disable 32S-2D trellis encoding

8Disable 64S-4D trellis encoding

16Disable Non linear coding

32Disable TX level deviation

64Disable Pre-emphasis

128Disable Pre-coding

S38 * Set duration before forced on-hook termination of a data connection when DTR is de-asserted during an MNP connection (0)

S41 * Bit mapped (0)

1Enable Distinctive Ring detection

Note: Defaults are underlined.

* indicates that the S register is saved in NVRAM.

The volume of the ringing sound from the internal speaker used in DSVD mode will be stored in an S register.