ZyXEL Communications omni.net LCD+M Fax Operation, Control Data Compression

Use command ATMn (n=0-3) to select when the speaker will be on or off. [S21b1-2]

AT Command	Description
ATM0	Speaker is always off.
ATM1	Speaker is on during call establishment, but off when receiving carrier. (Default.)
ATM2	Speaker is always on.
ATM3	Speaker on after the last digit is dialed out and off when carrier is detected.

Table 58. AT Command for selecting speaker

Control Data Compression

Use command AT&Kn (n=0-3) to enable or disable data compression negotiation. The internal fax/modem can only perform data compression on an error-corrected link. [S27b0-1]

AT Command	Description
AT&K0	Disables data compression.
AT&K1	Automatic data compression (Default.)
AT&K2	Enables MNP 5 data compression.
AT&K3	Enables V.42 bis data compression.

Table 59. Control Data Compression AT Command

Fax Operation

The ZyXEL omni.net LCD+M supports the Group 3 sending and receiving facsimile function. You must connect the modem to a computer, usually a PC. The computer is the input/output device for the fax function. The interface between the modem and the computer is the normal RS-232 serial connection. The modem uses the same interface for both data and fax applications. In fax operation, it performs protocol handshaking and image data transfer, and the computer does the job of image data creation, capturing, conversion, compression, decompression, retrieving, and storing. You can send and receive fax by applying popular compatible fax packages such as Winfax or Microsoft Fax.

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