Synchronization For Mpr-E Standalone And 7705 Sar - Alcatel-Lucent 9500 User Manual

Functional description
• SynchE: Any Synchronous Ethernet clock source available at enabled User Ethernet
traffic interfaces (both electrical and optical), configured in synchronous operation
mode (the User Ethernet ports, SynchE compatible, are given in
interface). From ITU-T G.8264 point of view, the MSS is a Synchronous Ethernet
equipment equipped with a system clock (NEC).
A User Ethernet interface configured in synchronous operation mode can work only
at 1 Giga. In the particular case of electrical User Ethernet interfaces, these interfaces
perform link auto negotiation to determine the master and slave clocks for the link.
The clock slave role must be configured as part of auto negotiation parameters in
order to use the interface as Synchronous Ethernet clock source.
Some rules have to be followed while configuring the Primary and Secondary clock
sources.
All the NECs have to be configured as Master or Slave.
Only one Master is allowed in the network.
• If Master,
•
•
• If Slave,
•
•
•
For each available sync source, the CRU detects the signal Degrade Alarm on each
available sync source. Such Signal Degrade alarm raises also in case of muted (missing)
clock.
The Signal Degraded Alarm relevant to the selected Synchronization Source, or the
relevant circuit Fail, causes the switching of the Synchronization Source.
3.10.15.2 — Synchronization for MPR-e standalone and 7705 SAR
In case of optical interface between MPR-e standalone and 7705 SAR, standard SynchE
shall be used. On the contrary, when copper interface is selected, synchronization must be
provisioned for PCR between the MPR-e and a microwave port on the 7705 SAR.
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The Restoration Mode can be Revertive or Not Revertive. If the mode is
Revertive, when a failed source becomes available, the switch goes back.
The Primary sources must be chosen among 1), 2) or 4).
• depending on master primary selection, the Master Secondary Source
must be selected among 1), 2) or 4).
The Restoration Mode is fixed to Revertive.
The Primary Source must be chosen between 3) or 4)
The Secondary Source can be chosen among 1), 2) or 4).
MPR-e and MSS-1c User Manual 3DB19901EFAA Edition 01
Ethernet user