Allied Telesis AR700 SERIES Software Release 2.7.1 User Manual

Page 80

AR700 Series Router User Guide

Software Release 2.7.1
C613-02047-00 REV A

Set directory numbers and subaddresses.

The router’s ISDN directory numbers and subaddresses are set with the
command:

set q931=0 num1=number num2=number sub1=subaddress

sub2=subaddress

This step is only required if the router is sharing the ISDN S/T bus with
other ISDN devices. See the Software Reference for more information.

Create call definitions.

Create ISDN call definitions to enable the router to make ISDN calls to
other devices on the ISDN network. This is the only step you must
complete to configure ISDN on the router. Before a call can be made from
one router to another, create call definitions on both routers, by entering
the command:

add isdn call=name number=number precedence={in|out}

options...

For example, a Remote Office router is to be connected to the Head Office
router via ISDN. The ISDN number of the Remote Office router is 1234567.
The ISDN number of the Head Office router is 9876543. The called party
subaddress information element (IE) is used to carry connection
information, and PPP interfaces are created explicitly to use the ISDN calls.
Either router can initiate the call, but calls from the Remote Office have
precedence. On the Head Office router, to create a call to the Remote Office
router, enter the command:

add isdn call=roho outsub=local searchsub=local

number=1234567 prec=in

On the Remote Office router, to create a call to the Head Office router, enter
the command:

add isdn call=roho outsub=local searchsub=local

number=9876543 prec=out

Each call has the same name (ROHO), and this name is passed via the
called subaddress IE to provide identification to the remote end of the link.
Each router will search for this call using the called subaddress IE.

You must set the precedence to ensure that in the event of a call collision
(the same call made and answered at the same time), one call is completed
and other call is cleared. The direction of precedence is not important, but
set precedence to IN at one end of the call and OUT at the other end of the
call.

The ISDN number is the exact sequence required to reach the remote router
from the local router, including STD access codes and area codes. The
number may contain only decimal digits. Hyphens and other characters
will result in an error.

Check that the ISDN calls are successfully added with the command:

show isdn call

Create PPP interfaces.

Create PPP interfaces to use the ISDN calls. PPP provides the link layer
protocol and enables multiple network and transport layer protocols such
as IP and Novell® IPX to be carried over the same ISDN link.

For example, on the Head Office router create PPP interface 0 to use the
ISDN call ROHO by entering the command:

create ppp=0 over=isdn-roho