Chapter 3 – Fax Class 2 Commands

Originate and send a two page facsimile with V.34 half-duplex (Class 2.1)

Optional T.30 frames are omitted. +FNR=1,1,, +FIS and +FCS subparameters other than BR and EC are not shown.

Host

Modem

Local Modem

Remote Station

Notes

Commands

Responses

Action

Action

 

 

 

 

 

 

 

 

 

AT+FCLASS=2.1

OK

Set class 2

 

 

 

 

 

 

 

AT+FIS=,B,,,,3,,,

OK

Set for Rec. V.34,

 

 

 

 

Annex A/T.30,

 

 

 

 

Annex C/T.30 or

 

 

 

 

Annex F/T.30

 

 

 

 

 

 

 

ATD<dial string>

 

off-hook, dial,

detect ringing

(“Chan” = channel)

 

 

send CNG

answer

 

 

 

detect CNG

 

 

 

detect ANSam

send ANSam

 

 

+FCO

send CM

get CM

Rec. T.30 selected

 

get JM

send JM

 

 

send CJ

get CJ

with

 

 

negotiate Rec. V.34

negotiate Rec. V.34

JM signal from

 

 

begin control chan

begin control chan

remote terminal

 

+FIS:,B,,,,1,,,

get DIS

send DIS

the remote indicated

 

OK

 

 

 

 

 

 

28 800 bit/s ability

 

 

 

 

 

AT+FDT

 

send DCS

get DCS

in this example,

 

+FCS:,9,,,,1,,,

get CFR

send CFR

24 400 bit/s is

 

CONNECT

switch to primary

switch to primary

selected

<1st page data>

 

chan

chan

 

<DLE><mps>

 

send page FCD

get page data

 

 

 

switch to control

switch to control

 

 

OK

chan

chan

 

 

send MPS

get MPS

 

 

 

get MCF

send MCF

 

 

 

 

 

 

AT+FDT

CONNECT

switch to primary

switch to primary

 

<2nd page data>

 

chan

chan

 

<DLE><eop>

 

send page 2 FCD

get page 2 FCD

 

 

 

switch to control

switch to control

 

 

+FHS:00

chan

chan

 

 

send EOP

get EOP

 

 

OK

get MCF

send MCF

 

 

 

send DCN

get DCN

 

 

 

hang-up

hang-up

 

 

 

 

 

 

Multi-Tech Systems, Inc. SocketModem MT5634SMIxx Reference Guide (S000263C)

98

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Multi-Tech Systems MT5634SMI V.92, MT5634SMI V.34 manual Host Modem Local Modem Remote Station Commands

MT5634SMI V.34, MT5634SMI V.92 specifications

The Multi-Tech Systems MT5634SMI is a versatile and robust external modem designed to cater to a variety of communication needs. As a V.92/V.34 standard modem, it provides reliable and efficient data connections for both home and business users. Its unique blend of features and technologies makes it an excellent choice for users looking to achieve optimal performance in their data transmission.

One of the standout features of the MT5634SMI is its support for the V.92 standard, which offers faster throughput and enhanced performance compared to prior standards. With V.92, users can experience download speeds of up to 56 Kbps and upload speeds reaching 48 Kbps. This improved speed is particularly beneficial for users who frequently download large files or engage in data-intensive activities.

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