ZyXEL ACCESSING INTERNET & INTRANET omni series Manual de usuario descargar pdf (Pagina 41)

ISDN Communication Basics 29

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

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ZyXEL ACCESSING INTERNET & INTRANET omni series Manual de usuario Pagina 41