CCM

CCM is expanded in two ways:

1. continuity check message

   In a CFM enabled network, CCM is a multicast PDU transmitted periodically by a MEP to assure the continuity over the MA to which the transmitting MEP belongs.

2. chassis control module

   In the 7950 XRS, a module that houses all management connections and supports operator access to the routing system. CCMs include an LCD touch-screen that supports interfaces for functions such as alarm management and timing management. Each 7950 XRS includes two CCMs that are physically connected to a CPM.