Filter
Top Products
Chapter 45. Using the ISDN Interface
This chapter describes the Integrated Services Digital Network (ISDN) interfaces on
the IBM 2210. It includes the following sections:
v “ISDN Overview”
v “ISDN Cause Codes” on page 614
v “Sample ISDN Configurations” on page 616
v “Channelized T1/E1” on page 617
v “Requirements and Restrictions for ISDN Interfaces” on page 618
v “Before You Begin” on page 619
v “Configuration Procedures” on page 619.
v “ISDN I.430 and I.431 Switch Variants” on page 625
v “X.31 Support” on page 626
ISDN Overview
The ISDN interface software allows you to interconnect routers over ISDN. You can
set up the interface to act as a dedicated link or to initiate and accept
switched-circuit connections, either on demand, automatically from restart, or on
command by the operator.
I.430, I.431, and Channelized T1/E1 are not switched. They are permanent
leased-line type connections.
ISDN Adapters and Interfaces
The following ISDN adapters are available for the 14T, 24T, 24E, and 24M models:
v 1-Port S/T ISDN-BRI
v 4-Port S/T ISDN-BRI
v 4-Port U ISDN-BRI
v 1-Port Channelized E1 120-ohm ISDN-PRI
v 1-Port Channelized T1/J1 ISDN-PRI
The PRI/Channelized adapters have an integrated CSU/DSU, so an external
CSU/DSU is not required.
The interfaces are:
v Basic Rate Interface (BRI)
The Basic Rate Interface provides two 64-Kbps (Kilobits per second) bearer (B)
channels and one 16-Kbps data (D) channel. The B-channels are used as HDLC
frame delimited 64-Kbps pipes. The D-channel is used to set up calls. The
D-channel can also be used for X.25 traffic.
v Primary Rate Interface (PRI)
The Primary Rate Interface provides functions that are similar to those provided
by the Basic Rate Interface. However, there are some important differences:
– The PRI adapter does not support multipoint. The BRI adapter does.
© Copyright IBM Corp. 1994, 1998 611
|
|
|
|