Cisco 10000 Series Configuration Manual page 144

Controller Configuration Commands
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Use the no form of the command to cancel a logical channel group previously created.
The following examples show how you use the channel-group command in E1 mode:
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Specifying T1 Channel Groups
A T1 port has 24 fixed timeslots available. Each T1 timeslot is a 56- or 64-kbps DS0 band depending on
the configured line speed. To create T1 interfaces that support subscriber traffic rates from 56 kbps to
1344 kbps on any of the 24 line card ports operating at 56 kbps, you combine timeslots into framed
channel groups.
To create T1 interfaces that support subscriber traffic rates from 64 kbps to 1536 kbps on any of the 24
line card ports operating at 64 kbps, you do the same.
You use the channel-group command to create one or more interfaces at any port operating in T1 mode.
The T1 channel groups have these characteristics:
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Cisco 10000 Series Router Line Card Configuaration Guide
5-22
unframed specifies a single digital interface whose bandwidth is 2048 kbps. If you do not specify
this option, you invoke E1 framing and the channel-group bandwidth depends on the number of
timeslots you assign to the interface.
In this example, you configure channel group 20 as nine timeslots, whose bandwidth is 576 kbps,
on port 0:
Router(config)# controller E1 1/0/0
Router(config-controller)# channel-group 20 timeslots 1-9
Router(config-controller)#
To access the interface configuration mode for this channel group, you enter:
Router(config)# interface serial 1/0/0:20
Router (config-if)#
In this example, an E1 interface includes channel group 18 and consists of all 31 timeslots, creating
a full-rate framed E1 interface at port 0:
Router(config)# controller E1 1/0/0
Router(config-controller)# channel-group 18 timeslots 1-31
Router(config-controller)#
To access interface configuration mode for this channel group, enter:
Router(config)# interface serial 1/0/0:18
Router(config-if)#
In this example, three channelized E1 interfaces are configured as three channel groups, which use
11 of the 31 available timeslots, at port 0:
Router(config)# controller E1 1/0/0
Router(config-controller)# channel-group 19 timeslots 1-6
Router(config-controller)# channel-group 20 timeslots 10
Router(config-controller)# channel-group 21 timeslots 7-9, 24
Router(config-controller)#
In this example, channel groups 19, 20, and 21 are cancelled and timeslots 1 to 10, and 24 are
restored to the available port 0 channel-group pool.
Router(config)# controller E1 1/0/0
Router(config-controller)# no channel-group 19
Router(config-controller)# no channel-group 20
Router(config-controller)# no channel-group 21
Router(config-controller)#
A channel group is an interface.
Chapter 5 24-Port Channelized E1/T1 Line Card Configuration
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