Introduction

Synchronization — Ethernet ports

PDH and SDH data flow is fragmented and the fragments are transmitted over a packet-switched network. The data rates are controlled by the terminating sites using clocks. The rate at which the fragments are transferred varies, based on the variations in these clocks. By synchronizing the clocks on the terminating devices, the received fragments are reassembled as in the original PDH or SDH data flow at the original bit rate.

You can configure synchronization on the Ethernet ports on the following cards:

• Core-E

• EASv2

• EAC

• CAHD

Before configuring synchronous Ethernet, ensure the following:

• SFP must be configured on ports 5 and 6 on a Core-E card using a Wavence element manager.

• SFP must be configured on ports 5 to 8 on an EASv2 card using a Wavence element manager.

• SFP must be configured on an EAC card using WebCT.

• Ethernet ports and SFPs must be administratively up.

See To configure synchronization on Wavence Ethernet ports for more information.

Synchronization — CorEvo and MSS-1

The CorEvo card and MSS-1 shelf do not have dedicated synchronization ports. The SFPs configured on the CorEvo card or the MSS-1 provide Sync-In/Out ports. The SFPs are installed in ports 5 and 6 of an MSS-1 and ports 7 and 8 of a CorEvo card. See To configure synchronization on a CorEvo card or MSS-1 shelf using SYNC-IO SFPs for more information.