10
A R 7 2 0 R O U T E R Q U I C K S T A R T G U I D E
Note: If you wish to make your own ISDN cable, see the
AR Router
Hardware
Reference
for a detailed description of how to wire an
ISDN interface cable.
2
Check the operation by observing the state of the LEDs on
the rear panel of the AT-AR021(U) PIC. The
Active
LED will be lit
when the U interface is activated and operational at the physical
layer. The
D
LED will flicker as control traffic is exchanged with
the ISDN switch. The
B1
and
B2
LEDs will flicker as data is sent
and received on the B1 and B2 channels.
To test the AT-AR021(U) PIC you will need to configure a
routing protocol such as IP or IPX to use ISDN. See
Configuring
ISDN
,
Configuring an IP Network
and
Configuring a Novell IPX
Network
later in this guide for more information about
configuring ISDN calls and routing protocols.
CONNECTING TO A PRIMARY RATE ISDN SERVICE
To connect an AR720 router with an AT-AR020 PRI E1/T1 PIC
installed to a Primary Rate ISDN service, follow these steps:
1
Check that the AT-AR020 PRI E1/T1 PIC has the correct
mode and termination for local conditions. The AT-AR020 PRI
E1/T1 PIC is shipped pre-configured for normal LT operation in
T1 mode, with the standard termination jumpers removed. This
is appropriate for most situations. If the PIC is to be operated
in a non-standard mode, contact your distributor or reseller.
The commands:
SHOW PRI STATE
SHOW PRI CONFIGURATION
display the state of the PRI interface and the modules configured
to use the PRI interface. Check the output of the SHOW PRI
STATE command that “ISDN Interface type” is set to “TE”. If not,
contact your distributor or reseller for assistance.
2
Connect an approved ISDN 120
Ω
cable from the ISDN
service provider’s termination point to the PRI interface on the
rear panel of the AT-AR020 PRI E1/T1 PIC. If the router is
being connected to a 75
Ω
network, an external balun is
required. Contact your distributor, reseller or ISDN service
provider for assistance.
Note: If you wish to make your own ISDN cables, see the
AR Router
Hardware
Reference
for a detailed description of how to wire an
ISDN interface cable.
Active
D Data
B Data
PRI E1/T1
NT
Connect the Primary Rate ISDN port on the rear panel of the AT-AR020 PRI E1/T1
PIC to the ISDN service provider’s termination point using an approved ISDN 120
Ω
cable or external balun.
3
Check the operation by observing the state of the LEDs on
the front panel of the AT-AR020 PIC. The “Active” LED should
be lit indicating the link to the NT is operational. The “D Data”
LED will flicker as control traffic is exchanged with the ISDN
switch. The “B Data” LED will flicker as data is transmitted and
received on any B channel. The “NT” LED indicates that the PRI
interface is in NT mode, and should not be lit during normal
operation. See
Configuring ISDN
,
Configuring an IP Network
and
Configuring a Novell IPX Network
later in this guide for more
information about configuring ISDN calls and routing protocols.
CONNECTING A TERMINAL OR MODEM
To connect a terminal or modem to an asynchronous port on
the AR720 router, follow these steps:
1
Use the supplied console cable or an approved terminal
cable to connect a terminal to an asynchronous port on the
rear panel of the router or the rear panel of an AT-AR024
ASYN4 PIC. Use an approved modem cable to connect a
modem to an asynchronous port on the rear panel of the
router or the rear panel of an AT-AR024 ASYN4 PIC.
Note: If you wish to make your own cable, see the
AR Router
Hardware
Reference
for a detailed description of how to wire a
terminal or modem cable.
PORTS
0
1
0
Tx
Rx
Connect the terminal or modem to an asynchronous port on the rear panel of the
AR720 router using an approved cable.
