MultiModemDID User Guide

Chapter 4 - AT Commands, S-Registers, Result Codes

 

 

S-Registers

Certain modem values, or parameters, are stored in memory locations called S-registers. Use the S command to read or to alter the contents of S-registers (see previous section).

Register

Unit

Range

Default

Description

S0

1 ring

0–255

1

Sets the number of rings until the modem

 

 

 

 

answers. ATS0=0 disables autoanswer

 

 

 

 

completely. Range varies by country. Set

 

 

 

 

S0=2 for Caller ID.

S1

1 ring

0–255

0

Counts the rings that have occurred.

S2

decimal

0–255

43 (+)

Sets ASCII code for the escape sequence

 

 

 

 

character. Values greater than 127 disable

 

 

 

 

escape.

S3

decimal

0–127

13 (^M)

Sets the ASCII code for the carriage return

 

 

 

 

character.

S4

decimal

0–127

10 (^J)

Sets the ASCII code for line feed character.

S5

decimal

0–127

8 (^H)

Sets the ASCII code for the backspace

 

 

 

 

character. Values over 32 disable it.

S6

seconds

2–65*

2*

Sets the time the modem waits after it goes

 

 

 

 

off-hook before it begins to dial the telephone

 

 

 

 

number.

S7

seconds

1–255*

50*

Sets the time the modem waits for a carrier

 

 

 

 

signal before aborting a call. Also sets the

 

 

 

 

wait-for-silence time for the @ dial modifier.

S8

seconds

2–65

2

Sets the length of a pause caused by a

 

 

 

 

comma character in a dialing command.

S9

decimal

0–127

37 (%)

Sets ASCII code for remote configuration

 

 

 

 

escape character. S9=0 disables remote

 

 

 

 

configuration.

S10

100 ms

1–255

20

Sets how long a carrier signal must be lost

 

 

 

 

before the modem disconnects.

S11

1 ms

50–150*

95*

Sets spacing and duration of dialing tones.

S18

50 ms

0–255

20

Sets the time the CD signal drops before

 

 

 

 

going high again. Used for some PBX and

 

 

 

 

CBX phone systems. See &C2 command.

S28

decimal

0, 1–255

1

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

S30

1 minute

0, 1–255

0

Sets the time the modem waits before it

 

 

 

 

disconnects when no data is sent or

 

 

 

 

received. A value of zero disables the timer.

 

 

 

 

See also the \T command

S35

decimal

0–1

0

0 disables, 1 enables the V.25 data calling

 

 

 

 

tone, which allows remote data/fax/voice

 

 

 

 

discrimination.

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Multi-Tech Systems MT5634ZBA-DID manual Registers, Register Unit Range Default Description