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Multi-Tech Systems MTS2SA-T User Manual

Page 122

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Chapter 10

− Modem Mode AT Commands, S-Registers, and Result Codes

Multi-Tech Systems, Inc. MultiConnect Serial-to-Serial Adapter User Guide (S000354A)

122

Register Unit Range Default Description

S27

73 (49Ah) General Bit-Mapped Options Status. Indicates the status of

command options.

Default:

73 (49h) (01001001b)

Bit 2 Leased line control (&Ln)

0 =

Dial up line (&L0) (Default.)

Bits 4 - 5

Internal clock select (&Xn)

0 =

Internal clock (&X0) (Default.)

1 =

External clock (&X1)

2 =

Slave clock (&X2)

Bit 6 CCITT/Bell mode select (Bn)

0 =

CCITT mode (B0)

1 =

Bell mode (B1) (Default.)

Bit 7 - Reserved

S28

0

General Bit-Mapped Options Status.

Indicates bit mapped options

status.
Default: 0
Bits 0 - 1

Reserved

Bit 2 Reserved (always 0).
Bits 3 - 4

Pulse dialing (&Pn)

0 = 39%-61% make/break ratio at 10 pulses per second (&P0)
1 = 33%-67% make/break ratio at 10 pulses per second (&P1)
2 = 39%-61% make/break ratio at 20 pulses per second (&P2)
3 = 33%-67% make/break ratio at 20 pulses per second (&P3)

Bit

5-7

Reserved

S29

10 ms

0–255 70 Flash Dial Modifier Timer. Sets the length of time, in units of 10 ms,

that the modem will go on-hook when it encounters the flash (!) dial
modifier in the dial string. S29 is a country dependent parameter. The
S29 value cannot be changed using S29=XX. Default: 70 (700 ms)
for U.S.

S30

10

s 0–255 0

Disconnect Inactivity Timer.

Sets the length of time, in tens of

seconds, that the modem will stay online before disconnecting when
no data is sent or received. In error-correction mode, any data
transmitted or received will reset the timer. In other modes, any data
transmitted will reset the timer. The timer is inoperative in
synchronous mode.

S31

192

(C0h)

General Bit-Mapped Options Status.

Indicates bit mapped options

status.

Default:

192 (C0h) (11000000b)

Bit 0 Single line connect message enable/disable (\Vn)

0 =

Messages controlled by S95, Wn and Vn (\V0) (Default.)

1 =

Single line connect message (\V1)

Bit 1 Reserved (0)
Bits 2-3

Error correction progress messages (Wn)

0 =

DTE speed only (W0) (Default.)

1 =

Full reporting (W1)

2 =

DCE (line) speed only (W2)

Bits 4-5

Caller ID (+VCID)

0 =

Caller ID disabled (+VCID=0) (Default.)

1 =

Short (formatted) Caller ID enabled (+VCID=1)

2 =

Long (unformatted) Caller ID enabled (+VCID=2)

Bits 6-7

Reserved (Default = 11b)

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