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CH224ATF

Complete 2400 bps Modem Module

Cermetek Microelectronics 

Cermetek Microelectronics, Inc.

Table 3. FAX Command Set Summary

FAX Command

Function

+FCLASS=n

Service class

+F<command>?

Report Active Configuration

+F<command>=? Report Operating Capabilities

+FAA=n

Data/Fax Auto Answer

+FF

Enhanced flow Control

+FTS=n

Stop Transmissions & Wait

+FRS=n

Receive Silence

+FTM=n

+FRM=n

+FTH=n

+FRT=n

+FRTn

+FTTn=m

+Hn

Transmit Data

Receive Data

Transmit Data with HDLC

Framing

Receive Data with HDLC

Framing

Receive Test Data

Transmit Test Data

Rockwell Protocol Interface (RPI

Enable)

Digit

Code

0

1

2

3

4

5

6

7

8

10

+F4

Table 5. Results Codes & Messages

Word Code

Meaning

OK

CONNECT

RING

NO

CARRIER

ERROR

CONNECT

1200

NO DIAL

TONE

BUSY

NO

ANSWER

CONNECT

2400

+FCERROR

Command line executed without

errors

Connection at 300bps

Ringing signal detected

Carrier lost or never present

Invalid command, checksum,

error in command line, or

command line exceeds 40

characters

Connection at 1200 bps

No dialtone detected

Busy signal detected

No silence detected when dialing

a system not providing a dialtone

Connection at 2400 bps

Fax carrier error

13

DATA

Connected as data modem

during auto answer

15

FAX

Connected as fax modem during

auto answer

Data/Fax Auto Answering

The modem can automatically determine if the incoming

call is from a data or fax modem, make the appropriate

connection, and inform the DTE of the connection type.

CH224ATF Complete 2400 bps Modem Module

Table 4. Register Summary

Register

Function

SO*

Rings to Auto –Answer

S1

Ring Counter

S2

Escape Character

S3

Carriage Return Character

S4

Line Feed Character

S5

Backspace Character

S6

Maximum time to Wait for Dial

Tone

S7

Wait for Carrier

S8

Pause Time for Comma

S9

Carrier Detect Response Time

S10

Carrier Loss Disconnect Time

S11

S12

S14*

DTMF dialing Speed

Escape Prompt Delay

General Bit mapped Options (&T)

S16

S17

S18*

S19

Fax Mode Null Byte Timer

Test Timer

Rockwell Protocol Interface

Speed

Fax ode Inactivity Timer

S20

S21*

S22*

General bit Mapped Options

General bit Mapped Options

General bit Mapped Options

S23*

General Bit Mapped Options

S24

Sleep Inactivity Timer

S25*

Delay to DTR Off

S26*

S27*

RTS-to-CTS Delay

General Bit Mapped Options

S28*

General Bit-Mapped Options

* Register value may be stored in one of two user

profiles with the AT&W command.

2001 Cermetek Microelectronics, Inc.

Page 4

Document No. 607-0005 Revision B1 (05/02)

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