19-4
ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter19 Configuring Circuit Emulation Services
Configuring CES T1/E1 Interfaces
The following defaults are assigned to CES T1 port adapters:
•Framing = ESF
•Line coding = B8ZS
The following defaults are assigned to CES E1 port adapters:
•Framing = E1_LT
•Line coding = HDB3
•International bits = 0x3
•National bits = 0x1f
•Multiframe spare bits = 0xb
Configuring CES T1/E1 Interfaces
To manually change any of the CES T1/E1 default configuration values, enter the interface cbr global
configuration command to specify a CBR interface, as follows:
interface cbr card/subcard/port
To configure the CES T1/E1 interfaces perform the following commands, beginning in g lobal
configuration mode:
Command Purpose
Step1 Switch(config)# interface cbr card/subcard/port
Switch(config-if)#
Selects the physical interface to be configured and
enters global configuration mode.
Step2 Switch(config-if)# shutdown Disables the interface.
Step3 Switch(config-if)# ces aal1 service {structured |
unstructured}
Configures the service type. The default is
unstructured.
Step4 Switch(config-if)# ces aal1 clock {adaptive | srts
| synchronous}
Configures the type of clocking.
Note For structured CES, the default is
synchronous.
Step5 Switch(config-if)# ces circuit circuit-id [cas]
[cdv max-req] [circuit-name name]
[partial-fill number] [shutdown]
[timeslots number]
[on-hook-detect pattern]
Configures the following CES connection attributes
for the circuit:
•Circuit id number.
–
For unstructured service, use 0.
–
For CES T1 structured service,
use 1 through 24.
–
For CES E1 structured service,
use 1 through 31.
•Enables channel-associated signalling for
structured service only. The default is no cas.
•Enables the peak-to-peak cell delay variation
requirement. The default is 2000milliseconds.