User guide

62 AR400 Series User Guide
Software Release 2.4.1
C613-02021-00 REV B
Installing Port Interface Cards (PICs)
Port Interface Cards (PICs) provide you with a cost effective and flexible way
to add new or additional network interfaces to your router. If you add or
change PICs, you can upgrade network interface capability without having to
replace the router.
For information about what PICs are available for your AR400 Series router,
see the AR Series Router Hardware Reference.
For information about installing a PIC see the Port Interface Card Quick Install
Guide.
For detailed information about PIC hardware see the Port Interface Card
Hardware Reference.
Connecting to a Leased Line Circuit
Leased lines are a commonly used for building Wide Area Networks (WANs).
A leased line maybe the right solution if you need to connect distant sites
across public areas. By installing an AT-AR023 SYN PIC in your AR400 Series
router this option is available to you.
To connect your AR400 Series router with an AT-AR023 SYN PIC installed to
a synchronous leased line circuit, follow these steps
The following steps are required:
1. Follow the instructions in the Port Interface Card Quick Install Guide on how
to install the AT-AR023 SYN PIC.
2. Use the appropriate approved transition cable (RS-232, X.21 or V.35), to
connect the synchronous port on the rear panel of the AT-AR023 SYN PIC
to the telecommunication service provider’s NTU.
3. To check the configuration of the port, enter the command:
SHOW SYN=n
where n is the synchronous port number. Verify that the information
displayed is correct. In particular, you should set “State” to “enabled” and
“Interface type” should match the transition cable used.
4. Configure a data link layer module, such as PPP (Point-to-Point Protocol),
Frame Relay or X.25 LAPB, to use the synchronous interface. To create a PPP
interface 0 to use synchronous port 0, enter the command:
CREATE PPP=0 OVER=SYN0
5. To check the configuration, enter the commands:
SHOW SYN=0
SHOW PPP=0
The output of the SHOW SYN command should show “Active” set to “yes”
and “Module” set to “ppp”. The output of the SHOW PPP command should
show interface ppp0 over syn0 with “LCP” as the control protocol. The Tx
and Rx LEDs are lit as data is sent and received on the interface.