Finding Feature Information; Information About Clock Recovery - Cisco T1 Configuration Manual

Clock Recovery System for CESoPSN
The Clock Recovery System recovers the service clock using Adaptive Clock Recovery (ACR) and Differential
Clock Recovery (DCR).
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Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and
feature information, see
find information about the features documented in this module, and to see a list of the releases in which each
feature is supported, see the feature information table.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support.
To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.

Information About Clock Recovery

Clock Recovery System in CESoPSN
The Clock Recovery System is able to recover the service clock using two methods, the Adaptive Clock
Recovery and Differential Clock Recovery.
Adaptive Clock Recovery in CESoPSN
When emulating TDM over PSNs, the physical layer clock is sometimes not available to both ends. Adaptive
Clock Recovery (ACR) is a technique where the clock from the TDM domain is mapped through the packet
domain. The sending Inter Working Function (IWF) processes outgoing packets with an internal free-running
Finding Feature Information, on page 39
Information About Clock Recovery, on page 39
Prerequisites for Clock Recovery, on page 41
Restrictions for Clock Recovery, on page 41
How to Configure ACR and DCR, on page 42
Associated Commands, on page 45
Additional References for Clock Recovery, on page 46
Bug Search Tool
48-Port T1/E1 CEM Interface Module Configuration Guide, Cisco IOS XE Fuji 16.7.x (Cisco NCS 4200 Series)
C H A P T E R
and the release notes for your platform and software release. To
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