1. Virtual Signaling Transfer Point User Guide
  2. vSTP Features
  3. Time Division Multiplexing
  4. TDM Protocol Layers
  5. M3RL Layer

2.9.4.2 M3RL Layer

The M3RL Layer performs all the functionalities specified in ITU-Q.703 & ITU-Q.704. For the Linksets with MTP2 Adapter type, the M3RL layer sends link indications & SS7 traffic to the MTP2 Adapter Layer. M3RL Layer processes the Link Status indications received from the MTP2 Adapter layer.

Upon change of link availability status, the M3RL layer performs following:

  • Changeover or changeback procedures.
  • Traffic buffering while the Linkset is On-Hold.
  • Traffic rerouting upon completion of change back or changeover procedure.
  • Congestion management for the links.