46 Channelized T1 Port Adapter Installation and Configuration
Cisco 7200 Series and the 2CT1 Port Adapter
Step 7
Map timeslots to the controller’s PRI group by entering the pri-group command. The
following example shows PRI-group timeslots 1, 3 through 5, and 7 (the B channels)
selected and mapped to timeslot 24 (the D channel), which is recognized by the system
as timeslot 23:
Router(config-controller)# pri-group timeslots 1,3-5,7
Router(config-controller)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/1:23,
changed state to down
%LINK-3-UPDOWN: Interface Serial1/1:23, changed state to up
Note
In the above example, the line-protocol status for timeslot 24 (listed in the output
as timeslot 23) represents the entire PRI group.
Step 8
If IP routing is enabled on the system, assign an IP address and subnet mask to the PRI
group with the interface and ip address commands as follows.
Note
For channelized T1 ISDN PRI, the PRI group is configured by using timeslot 24,
which is recognized by the system as timeslot 23.
Router(config-controller)# interface serial 1/1:23
Router(config-if)# ip address 10.1.15.1 255.255.255.0
Router(config-if)#
Step 9
Add any additional configuration commands required to enable routing protocols and
adjust the interface characteristics.
Step 10
Use the no shutdown and exit commands respectively to reenable the interface and
return to configuration mode as follows:
Router(config-if)# no shutdown
Router(config-if)# exit
Router(config)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/1:23,
changed state to up
%LINK-3-UPDOWN: Interface Serial1/1:23, changed state to up
Step 11
After configuring the PRI group and timeslots, map all unused timeslots to an unused
channel group and shut down the unused channel group by entering the channel-group
and shutdown commands, respectively.
Note
Both 2CT1 port adapter interfaces support simultaneous operation in channelized
T1 and ISDN PRI modes.
