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Chapter 4
Configuring the Unchannelized Mode
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Selecting a T3 Controller
You must enter the following controller command, before any other configuration commands, to select
the T3 controller you want to configure:
controller T3 chassis-slot/T3-port
The example that follows is for a port adapter in slot 1 of a Cisco 7200 VXR router:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# controller t3 1/0
Router(config-controller)#
Setting Unchannelized Mode for the T3 Controller
To configure the T3 for unchannelized mode, use the no channelized command. After the full-rate T3
interface is configured, use the dsu bandwidth command to create a subrate T3 interface. The following
example configures a subrate T3 interface on a PA-MC-T3-EC in port adapter slot 1 of a
Cisco 7200 VXR router:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# controller t3 1/0
Router(config-controller)# no channelized
Router(config-controller)# exit
Router(config)# interface serial 1/0
Router(config-if)# dsu bandwidth 16000
Router(config-if)# encapsulation frame-relay
Router(config-if)# ip address 10.10.10.10 255.255.255.255
Router(config-if)# no shutdown
When the PA-MC-T3-EC is configured for unchannelized T3 mode, its default MTU size is set to 4470
for compatibility with other T3 equipment and port adapters.
Setting the T3 port to unchannelized mode creates a serial interface that the following commands may
be used to configure. Use the interface serial command to select the serial interface.
Router# configure terminal
Router# interface serial 1/0/1
Router(config-if)#
Setting the Framing Type for the Serial Interface
In interface configuration mode, specify T3 framing by entering the framing {c-bit | m13} configuration
command where:
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Use the
OL-10589-02
Viewing the Results of a BER Test, page 4-12
Terminating a BER Test, page 4-14
c-bit is—c-bit parity DS3 framing.
m13 is—M13 Multiplex DS3 framing.
form of this command to return to the default, c-bit framing.
no
Configuring an Unchannelized T3 Link
PA-MC-T3-EC Port Adapter Installation and Configuration
4-5
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