Alcatel-Lucent 9500 User Manual page 176

Functional description
• Adaptive clock recovery with or without the node timing: based on the average
rate at which the packets (fragments) arrive at Rx site (Adaptive: simpler network, but
performances depends on the PDV (Packet Delay Variation) in the Network. Always
used when the reference clock isn't distributed on the whole network). This method
can be selected for each E1 stream for TDM2Eth only.
Note: In meshed networks (rings) do not close the synchronization configuration.
3.10.15.1.1 — Differential clock recovery
A common reference clock is available at both Ends.
The IWF system, at Rx side, generates the output clock based on RTP TimeStamps which
are sent together with each Fragments.
3.10.15.1.2 — Adaptive clock recovery
176 MPR-e and MSS-1c User Manual 3DB19901EFAA Edition 01