The 2-Port and 4-Port Clear Channel T3/E3 SPAs support clear
channel services over serial lines only.
If a controller is not channelized, then it is a clear channel
controller, and the full bandwidth of its associated serial line is dedicated
to a single channel that carries serial services.
When a T3 controller is channelized, it is logically divided
into smaller bandwidth T1 or E1 controllers, depending on which mode of
channelization you select. The sum of the bandwidth of the serial interfaces on
the T1 or E1 controllers cannot exceed the bandwidth of the T3 controller that
contains those channelized T1 or E1 controllers.
When you channelize a T3 controller, each individual T1 or E1
controller is automatically further channelized into DS0 time slots. A single
T1 controller carries 24 DS0 time slots, and a single E1 controller carries 31
DS0 time slots. Users can divide these DS0 time slots up into individual
channel groups. Each channel group can support a single serial interface.
When a controller is channelized, and channel groups have been
created, services are provisioned on the associated serial interfaces.
The channelization feature in this release allows the following
types of channelization:
A single T3 controller into 28 T1 controllers, for a total
controller size of 44210 kbps.
A single T3 controller into 21 E1 controllers, for a total
controller size of 43008 kbps.
A single T1 controller supports up to 1.536 MB.
A single E1 controller supports up to 2.048 MB.
A single shared port adapter (SPA) can support up to 448 channel
This section includes the following additional topics:
6 simultaneous BERT
sessions among first three physical ports and 6 simultaneous BERT sessions on
configured on a SONET/SDH controller for the 1-Port Channelized OC-3/STM-1 SPA
should be IC-SSO protected or none of them should be IC-SSO protected.
information about loopback support, see the “Loopback Support” section.