Version 6.6 473 October 2014
Installation & Operation Manual 38. Configuring the PSTN Subsystem
38.6.1 SIGTRAN (or UAL)
SIGTRAN (or UAL) is a set of protocols defined by IETF used to transport PSTN
signaling messages over IP networks. The communication is performed between
Signaling Gateway (SG) and Media Gateway Controller (MGC). The following UAL
protocols specifically apply to SS7 networks:
M2UA – used for backhauling of SS7 MTP2 user signaling messages
M3UA – used for transport of SS7 MTP3 user signaling messages (such as ISUP
and SCCP messages) between SG and MGC
38.6.2 Supported SS7 Architectures
The SS7 subsystem may be configured to support different SS7 network
architectures. This flexibility allows Mediant 8000 to successfully interop with different
3
rd
party equipment and signaling networks.
Supported SS7 architecture types are:
SS7 M2UA (SG Side) Architecture
SS7 MTP3/M3UA Architecture
SS7 M2TN Tunneling Architecture
Note: Multiple SS7 and ISDN applications may be configured simultaneously on the
same Media Gateway board (e.g. M2UA and IUA); however, when a redundant
MTP3 application is configured (see Configuring the MTP3/M3UA Application), no
other applications are supported.
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