Table 4: AT+ (Plus) Commands

Command

Option

Description

 

 

 

 

1

Computer transmits a Flag on an under-run within a

 

 

frame, and notifies the modem of any under-run or

 

 

over-run

 

d options

Specifies half-duplex control. Not available.

 

 

 

 

e options

Specifies the Cyclic Response Code (CRC) type

 

 

 

 

0

Disabled. No CRC generation or checking.

 

 

 

 

1

In Framed sub-mode, the computer generates 16-bit

 

 

CRC in the Transmit direction and the modem gen-

 

 

erates 16-bit CRC on the Receive direction.

 

 

 

 

f options:

Specifies Non-Return to Zero (NRZI) options

 

 

 

 

0

NRZI encoding and decoding are disabled.

 

 

 

+ETBM

 

Disconnect Buffer Delay Control

 

 

 

 

+ETBM=p,q

 

 

r

 

 

p options:

Specifies the disconnect buffer delay with pending

 

 

transmit data

 

0

Discard buffered data and disconnect

 

 

 

 

1

Attempt to transmit until all data is delivered, then

 

 

disconnect. Ignore timer.

 

2

Attempt to transmit until all data is delivered or

 

 

timer expires.

 

q options:

Specifies the disconnect buffer delay with pending

 

 

receive data

 

 

 

 

0

Discard buffered data and disconnect

 

 

 

 

1

Attempt to transmit until all data is delivered, then

 

 

disconnect. Ignore timer.

 

2

Attempt to transmit until all data is delivered or

 

 

timer expires.

 

 

 

 

r options:

Disconnect buffer delay timer, in 1-second incre-

 

1-255,

ments

 

default=0

 

+FCLASS

 

Fax/Data Mode

 

 

 

 

+FCLASS=

Data Mode

 

0

 

 

 

 

 

+FCLASS=

Fax Class 1

 

1

 

 

+FCLASS=

Voice Mode (Not available in Data/Fax and Data/

 

8

Fax/TAM modems.)

+FLO

 

Fax Flow Control

 

 

 

 

+FLO=0

None

 

 

 

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Image 19
Motorola SM56 manual +Etbm, +Fclass, +Flo