5-6
PA-MC-2T3+ Multi-Channel T3 Port Adapter Installation and Configuration
OL-3526-05
Chapter 5 Configuring Channelized mode for the Cisco PA-MC-2T3+
Configuring a Channelized T3 Link
Specifying the Cable Length for the T3 Controller
At the prompt, specify the cable length using the controller command
:
cablelength
feet
where:
•
feet
is a numeral from 0 to 450.
•
The default value is 49 feet.
An example follows:
Router(config-controller)#
cablelength 40
Note
For the
cablelength
feet
command, user-specified T3 cable lengths are structured into ranges as follows:
0–49 and 50–450 to represent short and long cables.
If the numerical value entered by the user falls within the lower range, then the PA-MC-2T3+ T3 port is
set for short cable output levels. If the value falls into higher range, the long cable output levels will be
used.
In the preceding example, a cable length of 40 is specified, which means that the 0–49 range is used. If
you change the cable length to 45, then the 0–49 range still applies. Further, if you specify a cable length
of 100 or 200, the 50–450 range applies in both cases. Only moving from one range (0–49) to the other
range (50–450) has an effect. The actual cable-length number you enter is stored in the configuration
file. It is recommended that the actual cable length be entered to ensure future compatibility.
Setting the Clock Source for the T3 Controller
At the prompt, set the internal or line clock source for the selected T3 controller with the controller
command:
clock source
{
internal
|
line
}
The default is clock source internal.
Examples follow:
•
Instruct the PA-MC-2T3+ to use a line clock source.
The example that follows is for a port adapter on a VIP in interface processor slot 1:
Router(config)#
controller T3 1/0/0
Router(config-controller)#
clock source line
The example that follows is for a port adapter in slot 1 of the Cisco 7200 series routers:
Router(config)#
controller T3 1/0
Router(config-controller)#
clock source line
•
Instruct the PA-MC-2T3+ to use an internal clock source.
The example that follows is for a port adapter on a VIP in interface processor slot 1:
Router(config)#
controller T3 1/0/0
Router(config-controller)#
clock source internal
The example that follows is for a port adapter in slot 1 of the Cisco 7200 series routers:
Router(config)#
controller T3 1/0
Router(config-controller)#
clock source internal
