ZyXEL Communications omni series Incoming Calls, Manually switching communication modes non-data

Models: omni series

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Manually switching communication modes (non-data)

The manual switching functions will only be necessary if your communication software does not allow you to change your dial-up string.

Conventional dialing commands: ATD, ATDT and ATDP, used by many existing communication software, can be mapped onto one of the new dialing commands according to the AT&O setting as follows:

AT Command

Dial string it will map to

AT&O0

ATD, ATDT and ATDP are the same as ATDB.

AT&O2

ATD, ATDT and ATDP are the same as ATDI.

AT&O3

ATD, ATDT and ATDP are the same as ATDA.

The factory default is AT&O2. This means the TA will select ISDN data mode when you do not specify which communication mode to use (i.e. ATD or ATDT).

Placing the Call

To initiate a call, choose the proper communication mode and configure the mode according to the bearer service (or protocol) you want to use. Here are some simple commands that will be useful when placing a call:

Command

Description

ATBnn

Changes ISDN B channel protocol setting.

ATDL

Re-dials the last dialed telephone number.

Incoming Calls

When a call comes in, it will be carried by one of the following protocols:

V.120

HDLC PPP, MPPP or SLIP

ISDN Communication Basics 29

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ZyXEL Communications omni series Incoming Calls, Manually switching communication modes non-data, Placing the Call