S Register definitions

Register

Range/Value

Default

Function

S0

0-255 rings

0

Number of rings to auto answer

S1

0-255 rings

0

Counts incoming rings

S2

0-255 ASCII

43

Escape character

S3

0-255 ASCII

13

Carriage return character

S4

0-255 ASCII

10

Line feed character

S5

0-255 ASCII

8

Backspace character

S6

2-255 secs

2

Dial tone wait before blind dialing

S7

1-255 secs

50

Remote carrier wait time

S8

0-255 secs

2

Comma pause time

S9

1-255, 100ms

6

Carrier detect pause time

S10

1-255, 100ms

14

Delay between carrier loss and hang up

S11

50-255 1ms

95

Tone duration in DTMF dialing

S12

0-255 20ms

50

Escape code guard tone

S13

.

.

RESERVED

S14

.

.

Bit mapped options

S15

.

.

RESERVED

S16

.

.

Test mode bit mapped options

S17

.

.

RESERVED

S18

0-255 secs

0

Modem test timer

S19-20

.

.

RESERVED

S21

.

.

V.24 bit mapped options

S22

.

.

Speaker bit mapped options

S23

.

.

Bit mapped options

S24

0-255 secs

0

Sleep inactivity timer

S25

0-255 10ms

5

Data terminal ready delay

S26

0-255 10ms

1

RTS-to-CTS delay

S27

.

.

Bit mapped options

S28

.

.

Bit mapped options

S29

0-255 10ms

70

Flash dial modifier tone

S30

0-255 10 secs

0 (disabled)

Inactivity time before hang up

S31

.

.

Bit mapped options

S32

0-255 ASCII

17

XON character

S33

0-255 ASCII

19

XOFF character

S34-35

.

.

RESERVED

S36

.

.

.

.

.

0, 3, 4, 7

0

3

.

4

7

7

.

.

.

.

.

LAPM failure control

Modem disconnects

Modem stays on line and establishes a Normal mode (speed buffering) connection .

Attempts MNP connection, if fails, disconnects.

.Attempts MNP connection: if fails, establishes a Normal mode (speed buffering) connection.

S37

.

.

.

.

.

.

.

.

.

.

.

0-12

0

1-3

4

5

6

7

8

9

10

11

12

0

.

.

.

.

.

.

.

.

.

.

.

Desired DTE connection speed

Attempt automode connection (F0)

Attempt to connect at 300 baud (F1).

RESERVED.

Attempt to connect at 1200 baud (F4)

Attempt to connect at 2400 baud (F5)

Attempt to connect at 75 bps send/1200 bps receive V.23 (F3)

Attempt to connect at 4800 baud (F6)

.Attempt to connect at 9600 baud (F8)

.Attempt to connect at 12000 baud (F9)

.Attempt to connect at 14000 baud (F10)

.Attempt to connect at 7200 baud (F7)

S38

0-255 secs

20

Delay before forced disconnect

S39

.

.

.

.

.

0-6

0

3

4

5

6

3

.

.

.

.

Flow control

No flow control

RTS/CTS (&K3).

XON/XOFF

Transparent XON (&K5)

Both methods (&K6)

S40-41

.

.

Bit mapped options

S42-45

.

.

RESERVED

S46

.

.

136 or 138

136

138

138

.

.

Data compression selection

Error correction with no compression

Error compression and correction

S48

.

.

.

0,7 or 128

0

7

128

7

.

.

.

V.42 negotiation action

No negotiation; bypass detection & negotiation, proceed with LAPM

Negotiation

No negotiation; bypass detection and negotiation, proceed with S36 fallback action

S80

.

.

RESERVED

S82

.

.

3,7 or 128

3

7

128

128

.

.

.

Break handling options

Break immediate, data integrity maintained before and after break

Break immediate; data at time of break destroyed

Break in sequence with any transmitted data; data integrity maintained ahead of and after break

S86

.

.

.

.

.

.

.

.

.

.

.

.

.

0,4.5.6.7, 8,9

10,11,12,13,14

0

4

5

6

7

8

9

10

11

12

13

14

.

Call failure reason code

.

Normal disconnect, no error

Loss of carrier

V.42 negotiation failed to detect remote error correction modem

No response to feature negotiation

This modem is async only; remote modem is sync only.

No framing technique in common.

Modems could not find a common protocol

Bad response to feature negotiation.

No sync information from remote modem

Remote modem initiated a normal disconnect

Remote modem does not respond after 10 message re-transmissions

Protocol violation

S95

.

.

.

.

.

.

.

Add numbers below

for desired messages

0

1

2

4

8

32

0

.

.

.

.

.

.

.

Extended result codes

.

CONNECT gives computer-to-modem (DTE) speed

CONNECT gives DCE speed

/ARQ after CONNECT if error correction is active.

CARRIER message

.PROTOCOL message

.COMPRESSION message