To define the timeslots that belong to each T1 or E1 circuit, use the channel-group controller configuration command. Use the no form of this command to clear the timeslots for the T1 or E1 circuit.
channel-group channel- number timeslots range [speed {48 | 56 | 64 }]
no channel-group [channel- numbertimeslots range]
channel-number Channel-group number. When configuring a T1 data line, channel-group numbers can be values from 0 to 23. When configuring an E1 data line, channel-group numbers can be values from 0 to 30.
timeslots range One or more timeslots or ranges of timeslots belonging to the channel group. The first timeslot is numbered 1. For a T1 controller, the timeslot range is from 1 to 24. For an E1 controller, the timeslot range is from 1 to 31.
speed {48 | 56 | 64 } (Optional) The speed of the underlying DS0s.
If you specify 56 kbps, the channel group is limited to 14 channels on the Cisco MC3810 MultiFlex Trunk (MFT). Because 56 is the default, you should specify 64 if you need more than 14 channels.
The default line speed when configuring a T1 controller is 56 kbps.
The default line speed when configuring an E1 controller is 64 kbps.
Controller configuration
| Release | Modification | 11.3 MA | This command was introduced. |
|---|
Use this command in configurations where the router or access server must communicate with a T1 or E1 fractional data line. The channel-group number may be arbitrarily assigned and must be unique for the controller. The timeslot range must match the timeslots assigned to the channel group. The service provider defines the timeslots that comprise a channel group.
This command also applies to Voice over Frame Relay, Voice over ATM, and Voice over HDLC on the Cisco MC3810.
Channel groups, CAS voice groups, and TDM groups all use group numbers. All group numbers configured for channel groups, CAS voice groups and TDM groups must be unique on the local Cisco MC3810 concentrator. For example, you cannot use the same group number for a channel group and for a TDM group.
The following example defines three channel groups. Channel-group 0 consists of a single timeslot, channel-group 8 consists of 7 timeslots and runs at a speed of 64 kbps per timeslot, and channel-group 12 consists of a single timeslot.
channel-group 0 timeslots 1 channel-group 8 timeslots 5,7,12-15,20 speed 64 channel-group 12 timeslots 2
The following example configures a channel group on controller T1 0 on a Cisco MC3810:
controller T1 0 channel-group 10 timeslots10 64
| Command | Description |
|---|---|
| framing | Selects the frame type for the T1 or E1 data line. |
| linecode | Selects the linecode type for T1 or E1 line. |
Printed for apswan@ctr.ap.nic.in on Wed Mar 5 22:32:57 PST 2003
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