With the leading-edge MGU (Media Gateway Unit)
module, the ULC-1000AN acts as a VoIP media gateway designed for
commercial VoIP deployment. It provides superior voice technology
for connecting legacy telephones (POTS), fax machines and PBX systems
over IP-based telephony networks.
ULC-1000AN in NGN architecture
The ULC-1000AN complies with H.248 (Megaco), MGCP
and SIP protocols. IP-based voice services are carried across the
packet core network and when they reach edge network, the ULC-1000AN
media gateway takes over the service delivery to customers using the
existing narrow band voice technology (POTS).
No change is perceived by customers, because they are able to continue
using existing user telephones or terminals.
Using standard G.711, G.729A, G.726 and G.723.1 compression algorithms
with Voice Activity Detection (VAD) and silence suppression, the ULC-1000AN
provides efficient bandwidth optimization, leaving more bandwidth
for data transport. The ULC-1000AN was designed and tested to be fully
interoperable with leading soft switches.
Migration
The ULC-1000AN is capable of having V5.2-interfaces
coexisted with VoIP media gateway function in the same platform. It
is ideal for gradual migration from conventional to NGN telephony.
ULC-1000AN in NGN architecture 
