Appendix

Appendix J: S-Register Summary (Modem)

Register

Unit

Range

Default

Description

 

S0

1 ring

0, 1–255

0

Sets the number of rings before the modem answers. ATS0=0 disables

 

 

 

 

auto answer completely.

S1

1 ring

0–255

0

Counts the rings that have occurred.

S2

decimal 0–255

43 (+)

Sets ASCII code for the escape code character. Values greater than 1227

 

 

 

 

disable the escape sequence.

S3

decimal 0–127

13 (^M)

Sets ASCII code for the RETURN character.

S4

decimal 0–127

10 (^J)

Sets ASCII code for the LINE FEED character.

S5

decimal 0–127

8 (^H)

Sets ASCII code for the BACKSPACE character. Values greater than 32

 

 

 

 

disable the backspace character.

S6

1 sec

2–65

2

Sets the time the modem waits for a dial tone before canceling the call.

 

 

4–255

4

 

 

 

 

 

4–7

 

 

 

 

S7

1 sec

1–255

50

Sets the time the modem waits for a carrier signal before aborting a call.

 

 

1–45

45

Also sets the wait for silence time for the @ dial modifier.

 

 

1–55

55

 

 

 

S8

1 sec

0–65

2

Sets length of pause caused by a comma character in a dialing command.

 

 

4–255

 

 

 

 

 

 

4–7

4

 

 

 

 

 

4

4

 

 

 

S10

100 ms

1–254

20

Sets how long a carrier signal must be lost before modem disconnects.

S11

1 ms

50–150

95

Sets spacing and duration of dialing tones. 50 ms is the minimum allowed.

 

 

80–255

80

 

 

 

 

 

80–255

 

 

 

 

S28

decimal 0, 1–255

1

0 disables, 1–255 enables V.34 modulation.

S35

decimal

0–1

0

0 disables, 1 enables the V.25 data calling tone, which allows data/fax/

 

 

 

 

voice discrimination.

S37

decimal 01–19

0

Sets the maximum dial line rate.

 

 

 

 

0

= maximum speed

 

 

 

 

1

= reserved

11 = 14400 bps

 

 

 

 

2

= 1200/75 bps

12 = 168000 bps

 

 

 

 

3

= 300 bps

13 = 19200 bps

 

 

 

 

4

= reserved

14 = 21600 bps

 

 

 

 

5

= 1200 bps

15 = 24000 bps

 

 

 

 

6

= 2400 bps

16 = 26400 bps

 

 

 

 

7

= 4800 bps

17 = 28800 bps

 

 

 

 

8

= 7200 bps

18 = 31000 bps

 

 

 

 

9

= 9600 bps

19 = 33600 bps

 

 

 

 

10 = 12000 bps

 

S42

decimal 0–1

10

For testing and debugging only.

 

 

 

 

Enables / disables V.32bis and V.22bis auto rate. Retrain and fallback are

 

 

 

 

disabled in data mode.

 

 

 

 

0

= disable; 1 = enable.

S43

decimal 0–1

1

For testing and debugging only.

 

 

 

 

Enables / disables V.32bis start-up auto mode operation.

 

 

 

 

0

= disable, 1 = enable.

S89

1 sec

0, 5-255

10

Sets the length of time in the off-line command mode before the modem

 

 

 

 

goes into standby mode. A value of zero prevents standby mode; a value

 

 

 

 

of 1-4 sets the value to 5.

MultiModemISI Hybrid Series, ISIHI-2S

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Multi Tech Equipment ISIHI-2S manual Appendix J S-Register Summary Modem, Register Unit Range Default Description
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