42 Channelized T1 Port Adapter Installation and Configuration
Cisco 7200 Series and the 2CT1 Port Adapter
The channel groups must be mapped before the 2CT1 controller can be configured. The following
are controller commands used to map the channel group (the default variable is listed first):
•
controller t1 port adapter slot number/interface port number
•
clock source [line | internal]
•
linecode [ami | hdb3]
•
framing [sf | esf]
•
loopback [local | remote]
•
shutdown
•
channel-group number timeslots list [speed {56 | 48 | 64}]
number is the channel-group 0 to 23.
timeslots is a number between 1 to 24. You can enter timeslots individually and separate them
by commas or enter them as a range separated by a hyphen (for example, 1-3, 8, 9-18). Timeslot
0 is an illegal configuration.
speed specifies the DS0 speed of the channel group; 56 kbps is the default.
Note
Cisco 7200 series routers identify channel groups as serial interfaces by port adapter slot
number, interface port number (0 or 1), and channel-group number (0 to 23). For example, the
address of the 2CT1 installed in port adapter slot 1, interface port 1, and channel group 5 would be
serial 1/1:5.
In the following procedure, press the Return key after each configuration step:
Step 1
At the privileged-mode prompt, enter configuration mode and specify that the console
terminal will be the source of the configuration commands as follows:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z. Router(config)#
Step 2
At the prompt, specify the controller to configure by entering the command controller,
followed by t1, and port adapter slot number/interface port number. The example that
follows is for the 2CT1 in port adapter slot 1, interface port 1:
Router(config)# controller t1 1/1
Step 3
Specify the controller’s clock source by entering the clock source command as follows:
Router(config-controller)# clock source line
Note
You can set the clock source to use internal clocking for testing purposes. One end
of a T1 circuit must provide the clock source.
Step 4
Specify the controller’s framing type by entering the framing command:
Router(config-controller)# framing esf
