Cisco T1 Configuration Manual page 41

Clock Recovery System for SAToP
To configure the clock on T1/E1 interfaces for SAToP in controller mode, use the following commands:
enable
configure terminal
controller t1/e1 0/0/1
cem-group 0 unframed
clock source recovered 1
exit
To configure RTP header on T1/E1 interfaces in global configuration mode, use the following commands:
interface cem 0/0/1
cem 0
rtp-present
To configure Differential clock recovery of T1/E1 interfaces, use the following commands in global
configuration mode:
recovered-clock 0 0
clock recovered 1 differential cem 1 0
exit
Note The clock configuration on controller must be done before configuring the clock recovery on global
configuration mode.
Verifying the Differential Clock Recovery Configuration of T1/E1 Interfaces for SAToP
Use the show recovered-clock command to verify the differential clock recovery of T1/E1 interfaces for
SAToP:
Router# show recovered-clock
Recovered clock status for subslot 0/4
---------------------------------------
Clock
0
Use the show running-config | section command to verify the configuration of differential clock of T1/E1
interfaces for SAToP:
Router# show running-config | section 0/0/1
controller T1/E1 0/0/1
framing unframed
clock source recovered 1
linecode b8zs
cablelength long 0db
cem-group 0 unframed
interface CEM 0/0/1
no ip address
cem 0
rtp-present
Use the show running-config | section recovered-clock command to verify the recovery of differential
clock of T1/E1 interfaces:
Type Mode
DS1 DIFFERENTIAL
48-Port T1/E1 CEM Interface Module Configuration Guide, Cisco IOS XE Fuji 16.7.x (Cisco NCS 4200 Series)
Verifying the Differential Clock Recovery Configuration of T1/E1 Interfaces for SAToP
CEM Status
0 ACQUIRED
Frequency Offset(ppb) Circuit-No
n/a 0 (Port)
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