ZyXEL Communications omni series user manual Placing a Call, Point-to-Point Configuration

Point-to-Point Configuration

In some areas, since Direct-Dial-In (DDI) number is less expensive than MSN, users may want to subscribe to point-to-point ISDN to employ the DDI function. In this case, only one TA can be connected to the ISDN line and the TEI (Terminal Equipment Identifier) is always ZERO. This can be done by setting the bit 1 of S-register S119:

S119.1 = 0 - Disable point-to-point DDI function (default).

S119.1 = 1 - Enable point-to-point DDI function.

Placing a Call

To initiate a call, configure the TA according to the Bearer Service (or protocol) you want to use.

∙ATBnn - for ISDN data calls.

Placing a call for DSS1

The ATDx command is used for dialing as follows:

ATDx[Yn][Nn]called_party_number[/[Zn]called-party- subaddress/]

x = I (for ISDN data calls), A (for the analog adapter 1), or B (for the analog adapter 2).

Yn specifies the type of number:

∙Y0 - unknown (default if Yn is omitted).

∙Y1 - international number.

∙Y2 - national number.

∙Y3 - network specific number.

∙Y4 - subscriber number.

Nn is the identifier of numbering plan:

Advanced ISDN Call Control 89