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APX 8000/MAX TNT/DSLTNT Physical Interface Configuration Guide Preliminary May 9, 2000 11-1
11
Configuring T3 Cards
Introduction to T3
The T3 slot card is a communications circuit composed of seven DS2s, each of which includes
four DS1s, each of which in turn is composed of 24 DS0s, for a total of 672 DS0 channels.
On the T3 card, DS2 channel 1 includes DS1 lines 1-4, DS2 channel 2 includes DS1 lines 5-8,
and so on. Each DS1 is similar to a T1 line, except that on the T3 card, a DS1 functions only if
the DS2 and DS3 of which it is a component are operating and in frame.
You can think of the T3 card as 28 T1 lines, because it provides 28 independently configurable
DS1 lines. Each of the DS1 lines has the same capabilities as the DS1 lines on a T1 card. Use
of SNMP for DS1-level management and status monitoring of the T3 card is the same as for
the eight-port T1card. No SNMP or status monitoring is currently available at the DS3 level.
Overview of T3 configuration
Table 11-1 lists the sections describing common tasks you might have to perform to configure
a T3 line. The table includes a brief description of each task and lists the parameters you will
use.
(This chapter describes only the specifics that apply to a T3 card. For information about
configuring T1 profiles, see Chapter 7, “Configuring T1 Cards.”)
Introduction to T3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1
Overview of T3 configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1
Understanding T3 configuration requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2
Understanding T3 slot card profiles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-3
Assigning a name to a T3 profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-4
Enabling a line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-5
Configuring the T3 physical link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-5
Configuring clocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-5