User`s guide
52 XSR User’s Guide
Configuring Channelized T1/E1 Interfaces Chapter 4
Configuring T1/E1 Interfaces
Line encoding - T1: AMI, B8ZS; E1: AMI, HDB3
Data inversion
Loopback Tests - local, network line, network payload, inband FDL
Alarm detection - all levels of alarm/event detection and signaling
T1/E1 Subsystem Configuration
Each T1/E1 physical port is represented as a T1 or E1 controller. This is valid
for both full rate T1/E1 mode and fractional/channelized modes. Each T1/E1
physical port (line) can be configured to run in one of the following modes:
Full rate T1/E1 mode - full T1/E1 line bandwidth is used by one user
Fractional T1/E1 mode - only one Channel Group is assigned to one
T1/E1 physical line
Channelized T1/E1 mode - more than one Channel Group is
assigned to one T1/E1 physical line
For both fractional and channelized configurations, each configured Channel
Group, which might contain individual timeslots or ranges of timeslots, uses
only one of the available logical channels. All configured T1/E1 lines are
recognized by the system software as serial interfaces. That implies that all of
the available configuration procedures for interfaces are applicable. Each of
the serial interfaces can be configured to carry data traffic with PPP encoding.
Configuring Channelized T1/E1 Interfaces
Perform the following steps to set up a channelized T1/E1 port. This T1
example is similar to that for an E1 controller and associated port.
1 Specify the card/port address of the controller to be configured:
XSR(config)#controller t1 1/0
This command automatically adds a full-rate channel group on port 0
and acquires Controller mode. Alternatively, you can add a different
port and manually add a channel group using any of the 24 timeslots.
2 Specify the clock source for the controller.
XSR(config-controller<T11/0>)#clock source line
The clock source command determines which one of the circuits
provides the clocking signal.
3 Specify the controller's framing type:
XSR(config-controller<T11/0>)#framing esf