Cisco ASR 900 Series Configuration Guide

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The clock ID should be unique for a particular interface module for ACR/DCR configuration.
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When CEM group is configured, dynamic change in clock source is not allowed.
Configuring ACR in VT 1.5-T1 mode for CESoPSN
To configure the CEM group in the SONET controller:
configure terminal
controller sonet <bay>/<slot>/<port>
rate OC3
sts-1 <num>
mode vt-15
vtg <vtg_no> t1 <t1_num> clock source recovered <clock-id>
vtg <vtg_no> t1 <t1_num> cem-group <cem-group-no> timeslots <1-24>
To configure the CEM interface for CESoPSN:
interface cem <bay>/<slot>/<port>
cem <cem-group-no>
To configure recovered clock for CESoPSN:
recovered-clock <bay> <slot>
clock recovered <clock-id> adaptive cem <port-no> <cem-group-no> priority <priority no>
Verifying ACR in VT 1.5-T1 mode for CESoPSN
Use the show recovered-clock command to verify the ACR for CEM groups 58 and 61 configured in VT 1.5
mode on T1 interface:
Router#show recovered clock
Recovered clock status for subslot 0/5
----------------------------------------
Clock Type Mode CEM Status Frequency Offset(ppb) Circuit-No
Priority
19 OCx-T1 ADAPTIVE 58 ACQUIRING n/a 0/2/1/1
(Port/path/vtg/t1) 2
20 OCx-T1 ADAPTIVE 61 ACQUIRING n/a 0/2/1/2
(Port/path/vtg/t1) 2
Configuring DCR in VT 1.5-T1 mode for CESoPSN
To configure the CEM group in the SONET controller:
configure terminal
controller sonet <bay>/<slot>/<port>
rate OC3
sts-1 <num>
mode vt-15
vtg <vtg_no> t1 <t1_num> clock source recovered <clock-id>
vtg <vtg_no> t1 <t1_num> cem-group <cem-group-no> timeslots <1-24>
1-Port OC-192 or 8-Port Low Rate CEM Interface Module Configuration Guide, Cisco IOS XE Everest 16.7.x
(Cisco ASR 900 Series)
58
Configuring SONET
Configuring ACR in VT 1.5-T1 mode for CESoPSN

Cisco ASR 900 Series Specifications

General

Brand	Cisco
Model	ASR 900 Series
Category	Network Router
Language	English