5-14
PA-MC-T3-EC Port Adapter Installation and Configuration
OL-10589-02
Chapter 5 Configuring the Channelized Mode
Configuring a Channelized T3 Link
•
Setting Loopbacks on a T1 Line, page 5-16
•
Configuring a BER Test on a T1 Line, page 5-19
•
Sending a BER Test Pattern on a T1 Line, page 5-19
•
Viewing the Results of a BER Test, page 5-20
•
Terminating a BER Test, page 5-23
Note
For consistency throughout the following configuration examples and whenever possible, the port
addresses 1/0 and 1/0/1:1 are used for Cisco 7200 VXR routers.
Your PA-MC-T3-EC port addressing might be different depending on the Cisco 7200 VXR router chassis
slot in which your PA-MC-T3-EC is installed.
Creating a Logical Channel Group on a T1 Line
You can create a logical channel group on a T1 line using the
t1
t1-line-number
channel-group
channel-group-number
timeslots
list-of-timeslots
[
speed
{56 | 64}] controller command where:
•
t1-line-number
is 1 to 28.
•
channel-group
defines a logical channel group.
•
channel-group-number
is 0 to 23.
•
timeslots
list-of-timeslots
can be 1 to 24 or a combination of subranges within 1 to 24 (each
subrange is a list of time slots of the T1 line).
•
speed
{
56
|
64
} is an optional argument that specifies the speed of a time slot to be either 56 kbps or
64 kbps.
The following example configures logical channel group 20 on T1 line 1 and assigns channelized time
slots 1 to 5 and 20 to 23.
The example that follows is for a port adapter in slot 1 of a Cisco 7200 VXR router:
Router(config)#
controller T3 1/0
Router(config-controller)#
t1 1 channel-group 20 timeslots 1-5, 20-23
Note
Each T1 link may have up to 24 channel groups with an overall limit of 128 for the 28 T1 links on each
T3 port. Unused channel groups in one T3 port may not be used by the other T3 port.
Note
Each channel group defined with this command causes a serial interface to be created. Refer to the
“Performing a Basic Serial Interface Configuration” section on page 5-24
for instructions on configuring
these interfaces.
Note
All the encapsulation formats, such as PPP, HDLC, SMDS, Frame Relay, and switching types are
applicable to the serial interface and can be set using the serial interface configuration commands.
