I-6APPENDIX I: S-REGISTERS

Register

Default

Function

 

 

 

 

Bit

Value

Result

 

 

1

2

Disable the Business Modem's

 

 

 

 

enhanced, proprietary V.32bis

 

 

 

 

modulation. Used for

 

 

 

 

troubleshooting.

 

 

2

4

Disable the faster retrains that occur

 

 

 

 

during proprietary V.32terbo

 

 

 

 

modulation. Used for

 

 

 

 

troubleshooting.

 

 

3

8

Enable V.23. Required for some

 

 

 

 

British connections.

 

 

6

64

Disable the remote-access busy

 

 

 

 

message.

 

 

7

128

Disable V.32terbo.

 

 

 

S38

0

Sets the duration, in seconds, before a forced hang-up and

 

 

clearing of the Transmit buffer when DTR drops during an

 

 

ARQ call. This is provided to allow time for a remote device

 

 

to acknowledge receipt of all transmitted data. Default =

 

 

0: The Business Modem immediately hangs up when DTR

 

 

drops. If the Business Modem receives the ATH command,

 

 

it ignores S38 and immediately hangs up.

 

 

 

S41

0

Sets the number of allowable remote-access login attempts,

 

 

thus enabling or disabling remote access. The default

 

 

setting of zero allows no remote login attempts, thus

 

 

disabling remote access. A value of 1 or greater enables

 

 

remote access. If the number of unsuccessful login

 

 

attempts exceeds the limit set by this register, the Business

 

 

Modem returns online and any further login attempts

 

 

during the remainder of that connection are refused.

 

 

 

S42

126

Stores the ASCII decimal code for the remote-access escape

 

 

character. The default character is a tilde (~).

 

 

 

S43

200

Sets the duration, in fiftieths of a second, of the guard time

 

 

for the remote-access (~~~~) sequence.

 

 

 

S51

0

Bit-mapped register. See Chapter 1, Using the AT

 

 

Command Set, for instructions about how to set

 

 

bit-mapped registers.

 

 

Bit

Value

Result

 

 

0

1

Disable MNP/V.42 for V.22 (1200 bps)

 

 

1

2

Disable MNP/V.42 for V.22bis (2400

 

 

 

 

bps)

 

 

2

4

Disable MNP/V.42 for

 

 

 

 

V.32/V.32bis/V.32terbo

 

 

 

 

(9600/14400/19200/21600 bps).

 

 

 

 

 

Page 188
Image 188
3Com 56K Disable the faster retrains that occur, Disable V.32terbo S38, Remote access. If the number of unsuccessful login