Black Box 3600 MODEM manual Fax Associated Options, Class 1 Details, Stored Fax Profile

Fax Operation

Fax Associated Options

A number of options can be changed without any effect on fax operation. These include items like speaker volume and pause for carrier. Appendix E lists the AT commands. These commands can be incorporated by personal preference into the initialization command. Compare fax operation requirements with Appendi xA and if necessary generate an initialization command string compatible with the software and the modem.

Stored Fax Profile

Another alternative is to develop a fax initialization command and store it in one of the user defined profiles. Fax initialization would include the command that recalls that profile for fax operation. Keep track of option changes between fax transmissions and if required reset the fax profile for the next fax transmission.

Class 1 Details

Operation as a fax modem complies with EIA-578; details of Class 1 operation and compatibility are found in that standard. There is no need to be familiar with these details since they are handled by the Class 1 software package, but this section briefly summarizes some of them.

As a Service Class 1 facsimile DCE, the Modem 3600 provides the basic services required to support Group 3 facsimile operation. Support from a Class 1 facsimile DTE is required to implement the CCITT T.30 recommendations for fax document transmission and the CCITT T.4 recommendations for encoding fax images. Using software control, the modem can:

•Connect calls

•Generate messages

•Detect waiting and silence

•Transmit and receive data

•Provide HDLC data framing, transparency, and error detection

The modem also filters data streams to and from the DTE in accordance with the Class 1 specification.

Modem 3600 9-3