APPENDIX C. S REGISTERS

S42 - S45

Reserved

 

 

S46 *

Data compression control (Range :136,138)

Default : 138

 

136

Executes error correction protocol with no comp ression

 

138

Executes error correction protocol with compression

S48 *

V.42 negotiation action (Range:0,7,128)

Default : 7

0Disables negotiation; bypass the detection and negotiation phrases; and proceeds with LAP-M

7

Negotiation enabled

128Negotiation disabled; bypass the detection and negotiation phrases; and proceed at once with the fallback action specified in S36. Can be used to force MNP.

S82

Break handling option (Range :3,7,128)

Default : 128

3Expedited; Modem sends a break immediately; data integrity is maintained both ahead of and after the break

7Destructive; Modem sends a break immediately; data being processed by each modem at the time of the break is destroyed

128In sequence; Modem sends a break in sequence with any transmitted data; data integrity maintained ahead of and after break

S86

Connection failure cause code

 

0

Normal disconnect, no error occurred

 

4

Loss of carrier

 

5

V.42 negotiation failed to detect an error-correction modem

 

 

at the other end

 

6

No response to feature negotiation

 

7

This modem is asynchronous only; the other modem is

 

 

synchronous only

 

8

No framing technique negotiation

 

9

The modems could not find a common protocol

 

10

Bad response to feature negotiation

 

11

No sync information from remote modem

 

12

Normal disconnect initiated by the remote modem

 

13

Remote modem does not respond after 10 re-transmissions

 

 

of the same message

 

14

Protocol violation

S91

PSTN transmit attenuation level (Range:0-15)

Default :

10

 

Sets the transmit level from 0 to -15 dBm for the PSTN mode. The

 

value may be limited as it is a country dependent parameter.

 

S92

FAX transmit attenuation level (Range:0-15)

Default :

10

ACTIVE Professional External Modem User’s Manual

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