1. Virtual Signaling Transfer Point User Guide
  2. vSTP Features
  3. Time Division Multiplexing
  4. TDM Protocol Layers
  5. MTP2 Adapter Layer (NIF)- Ingress and Egress

2.9.4.3 MTP2 Adapter Layer (NIF)- Ingress and Egress

The MTP2 Adapter Layer runs as an independent thread. It acts as a mediation layer between the M3RL Layer running on vSTP application and the MTP2 layer running on TDM PCIe Card.

The MTP2 Adapter layer has following functions:

  • Sending MTP3 data & indications from M3RL Layer to MTP2 layer on TDM PCIe Card.
  • Reading MTP3 data from MTP2 layer on TDM PCIe card & sending to M3RL layer.
  • Polling the MTP2 Layer on TDM PCIe Card for Link Status update indications & passing on these indications to the M3RL layer.
  • Fetching the FSN & BSN numbers from TDM PCIe Card during Link changeover.
  • Perform buffer retrieval from MTP2 link buffer on TDM PCIe Card & sending the retrieved buffers to M3RL layer.
  • Buffer any unsent messages to MTP2 Layer.