Cisco ASR 900 Series Configuration Guide

0 OCx-ds3 Differential 0 ACQUIRED n/a 0/1
(Port/t3)
Router# show running-config | section recovered-clock 0 4
recovered-clock 0 4
clock recovered 20 differential cem 6 0
Configuring ACR in Mode CT3 for CESoPSN
You must configure ACR in mode CT3. Mode CT3 is an STS-1 carrying a DS3 signal that is divided into 28
T1s (PDH).
enable
configure terminal
controller sonet <bay>/<slot>/<port>
rate OC3
sts-1 <num>
mode ct3
t1 <t1_num> clock source recovered <clock-id>
t1 <t1_num> cem-group < cem-group-no> timeslots <1-24>
recovered-clock <bay> <slot>
clock recovered <clock-id> adaptive cem <port-no> <cem-group-no>
Verification of EPAR Configuration
The following example shows the configuration of EPAR for STS-3c with negative pointer adjustment events
signaled using N-bits.
Router#show cem circuit interface cem 0/4/4 104
CEM0/4/4, ID: 104, Line: UP, Admin: UP, Ckt: ACTIVE
Controller state: up, CEP state: up
Idle Pattern: 0xFF, Idle CAS: 0x8
Dejitter: 6 (In use: 0)
Payload Size: 783
Framing: Not-Applicable
CEM Defects Set
None
Signalling: No CAS
RTP: No RTP
Ingress Pkts: 8507028158 Dropped: 0
Egress Pkts: 8507028151 Dropped: 0
CEM Counter Details
Input Errors: 0 Output Errors: 0
Pkts Missing: 0 Pkts Reordered: 0
Misorder Drops: 0 JitterBuf Underrun: 0
Error Sec: 0 Severly Errored Sec: 0
Unavailable Sec: 0 Failure Counts: 0
Pkts Malformed: 0 JitterBuf Overrun: 0
Generated Lbits: 0 Received Lbits: 0
Generated Rbits: 0 Received Rbits: 0
Generated Nbits: 81794328 Received Nbits: 81794328
Generated Pbits: 0 Received Pbits: 0
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)
145
Clock Recovery System for SAToP
Configuring ACR in Mode CT3 for CESoPSN

Cisco ASR 900 Series Specifications

General

Brand	Cisco
Model	ASR 900 Series
Category	Network Router
Language	English