M2PA (MTP2 User Peer-to-Peer Adaptation Layer) Protocol

M2PA is used primarily to replace B-, C-, and D-links. When used with A-links, M2PA connects to Service Switching Points, Signaling Control Points, Home Locater Registers and other endpoints. M2PA is a direct replacement for channelized TDM circuits because it provides specific controls for assurance of in-sequence delivery of messages. As such, M2PA is used to connect points that pass call-related data that is time-sensitive, such as ISUP calling data.

Congestion procedures conform to those specified by the ANSI/ITU standards. The M2PA protocol can coexist in a linkset with other link types such as low-speed links and ATM high speed links. When using other link types, the throughput will always match the lowest-speed link in the linkset.

Oracle implemented the M2PA protocol through its IPLIMx application. For more information on the IPLIMx application, see IPLIMx, IPGWx and IPSG applications.

Figure 2-2 M2PA Network