3Com V6100, User Manual Manual, Page: 310 / 496

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V6100 and V7122 User Guide
Figure 105 M2UA Architecture
Figure 106 M2TN Architecture
MTP2 Tunneling Technology
The SS7 tunneling technology is based on a pairing of remote and central gateways, as
shown in
Figure 107 . The remote gateways are configured to backhaul MTP layer 2 signaling
over the IP network using standard M2UA protocol (over SCTP protocol). The function of the
M2TN entity is to transmit traffic and handle all management events between MTP2 on the
TDM side and M2UA's MGC (Media Gateway Controller) entity on the IP side. Only the
actual SS7 MSU (Message Signaling Unit) data is sent. Management of the SS7 link is
performed using M2UA without transporting the MTP2 LSSU (Link Status Signaling Unit) and
FISU (Fill in Signaling Unit) messages over IP. These messages, in addition to MTP2 timing,
are terminated and supported, respectively, by the remote and central sides. Therefore, the
MTP2 connections are not affected by the fact that they are transported over IP.