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Cisco ME-3600X-24CX Series Switch Chassis Configuration Guide
OL-27620-01
Chapter 2 Configuring T1/E1 Interfaces
Configuration Examples
•
E1 = 256 bytes
•
T1 = 192 bytes
Default payload sizes for a structured CEM channel depend on the number of time slots that constitute
the channel. Payload size (L in bytes), number of time slots (N), and packetization delay (D in
milliseconds) have the following relationship: L = 8*N*D. The default payload size is selected in such
a way that the packetization delay is always 1 millisecond. For example, a structured CEM channel of
16xDS0 has a default payload size of 128 bytes.
The payload size must be an integer of the multiple of the number of time slots for structured CEM
channels.
Setting the Dejitter Buffer Size
To specify the size of the dejitter buffer used to compensate for the network filter, use the dejitter-buffer
size command. The configured dejitter buffer size is converted from milliseconds to packets and rounded
up to the next integral number of packets. Use the size argument to specify the size of the buffer, in
milliseconds. The range is from 1 to 500 ms; the default is 5 ms.
Shutting Down a CEM Channel
To shut down a CEM channel, use the shutdown command in CEM configuration mode. The shutdown
command is supported only under CEM mode and not under the CEM class.
Configuration Examples
This section includes the following configuration examples:
•
Framing and Encapsulation Configuration Example, page 2-16
•
CEM Configuration Example, page 2-17
Framing and Encapsulation Configuration Example
The following example sets the framing and encapsulation for the controller and interface:
! Specify the controller and enter controller configuration mode
!
Router(config)# controller t1 0/1
! Specify the framing method
!
Router(config-controller)# framing esf
!
! Exit controller configuration mode and return to global configuration mode
!
Router(config-controller)# exit
!
! Specify the interface and enter interface configuration mode
!
Router(config)# interface serial 0/1:0
!
! Specify the encapsulation protocol
!