CXR AJ 2885P Manual de usuario descargar pdf (Pagina 40)

User's Manual V34bis Fax-modem - AJ 2885 P

AJ 2885 P - Pa

e 40

7.2.2. Answering a Call

When the modem is set in answer mode, it will go off hook after 2 rings (if the command

ATS0=2 is sent). This is in conformity with CCITT V25bis recommendation.

7.2.3. Connection - Disconnection

In calling mode, the modem will automatically recognize the remote modem modulation type

and adapt correspondingly.

It will disconnect only if:

• The carrier is lost,

• No carrier tone is detected within 35 to 90 seconds,

• No data activity has occurred for the selected period of time dictated by the Inactivity Timer.

7.3. Serial interface

The V24 serial interface of the modem conforms to the DCE specifications. A straight ribbon

cable is all that is needed to connect to the DTE port of your computer or terminal. The serial

port will automatically recognize DTE speeds up to 115200 bps. This is called auto-bauding.

Both asynchronous and synchronous (except FSK : V21, V23) modes with internal or external

clock are supported.

7.4. Fax-mode

7.4.1. Automatic Call and Answer

See 5-2

7.4.2. Transmission Modes

The modem provides the ability to send and receive faxes at speeds up to 9600 bps.

The following modulations are supported:

ITU-T Speed Bps Carrier (Hz)

V21 300 1650 – 1850

V27 ter 2400 / 4800 1800

V29 7200 / 9600 1700

V17 12000 / 14400 1700

7.4.3. Operating Mode

In fax mode, the modem support the following standards:

• Group III Fax, EIA 578 class 1 and class 2 compatible,

• CCITT T4 - T30 recommendations.

7.4.4. Service Class 1 Command Set

The following AT commands control the operation of a class 1 modem/fax:

+FCLASS Service class identification and control

+FTS Stop transmission and wait

+FRS Receive silence

+FTM Transmit mode

+FRM Receive mode

+FTH Transmit T30 command mode

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CXR AJ 2885P Manual de usuario Pagina 40