N1 - ISDN numbering plan (Rec. E.164).

The destination_address is the ISDN phone number of the called party. The last digit of this number is the EAZ. Use ATDL to redial the last dialed ISDN phone number.

Leased Line ISDN

The B-channel protocols supported for the leased line are V.110, V.120, X.75, PPP and MP which is selected using ATBxx commands as in the dial-up mode. The following AT commands are used to select the Leased Line function:

AT&In

normal/leased line options S14b2-3.

AT&I0

normal dial-up phone line.

AT&I1

leased line function in B1 channel only, dial-up

 

function in B2 channel.

AT&I2

leased line function in B2 channel only, dial-up

 

function in B1 channel.

AT&I3

leased line function in both B1 and B2 channels.

If the leased line mode configuration has been saved as the power-on user's profile and upon power up, the TA will ALWAYS try to make a connection with the remote site using the pre-selected protocol, B-channel ( B1 or B2 ), and originate/answer mode. To change the TA from leased line mode back to dial-up mode, reset the modem to the factory default settings.

For some protocols that are originate/answer mode sensitive, use the following command to configure the originate/answer mode:

AT*Mn

leased line auto-handshake mode selection S14b0.

AT*M0

leased line auto-handshake for Originate mode.

AT*M1

leased line auto-handshake for Answer mode.

If the leased line mode is selected after power up, the following commands can be used to make a leased line connection:

Advanced ISDN Call Control 91

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ZyXEL Communications omni series user manual Leased Line Isdn