Omni 56K II and Omni 56K Plus II User’s Guide

3.17 Fax function

3.17.1Fax Physical Layer Protocol

Table 3-7 Fax Physical Layer Capacity

STANDARD

BIT RATE [BPS]

BAUD RATE

MODULATION

CARRIER

 

 

[BAUD]

 

FREQUENCY [HZ]

 

 

 

 

 

V.17

14400-7200

2400

TCM

1800

 

 

 

 

 

V.29

9600-4800

2400

QAM/DPSK

1700

 

 

 

 

 

V.27ter

4800-2400

1600/1200

PSK/DPSK

1800

 

 

 

 

 

V.21

300

300

FSK

 

 

 

 

 

 

3.17.2EIA Class 1/Class 2 & Class 2.0 Command Sets

Please refer to Section 5.2 Fax Command Sets.

3.17.3ITU-T T.30 Fax Protocol

The ITU-T T.30 fax protocol is known as the G3 fax handshake signals and procedures. The modem takes full control of this protocol - initiating and terminating fax calls, managing the communication session, and transporting the image data. Therefore, the modem relieves the computer fax software of the T.30 protocol handling.

You modem allows for fax speeds up to 14400 bps when transmitting to another fax machine that complies with the V.17 fax standard. Speeds will fall back to 12000, 9600, or 7200 bps in poor line conditions. When connecting to a G3 fax device, your modem allows for fax speeds up to 9600 bps and will automatically fall back to 7200, 4800, and 2400 bps if the line quality is poor.

3.18 Voice Function

Voice capability stands for the modem's ability to digitize incoming voice messages, which the computer stores and forwards. It also means that the modem can playback the recorded digitized voice online for a message announcement.

3.18.1Voice IS-101 Command Set

Please refer to the voice command sets Chapter 5.

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Specifications and Functions