ZyXEL Communications Multi-service Access Platform MSAP2000 - Manual (Page 28)

2. System Architecture
MSAP2000 Technical Manual V3.0 2-8
2.7. VoIP Gateway
VoIP Gateway
Along with the widespread usage of the Internet, VoIP
development has become an inevitable trend. Service Providers
are cutting down on PSTN switch usage, and turning towards
planning and deployment for Softswitch. To fulfill the needs of a
next generation network structure, MSAP2000’s VoIP Gateway
supports VoIP Protocols such as SIP and H.248. MSAP2000
can connect to Softswitch directly through the IP network, to
provide VoIP services. With MSAP2000’s VoIP Gateway, there
will be no problems with transitions from PSTN to Softswitch,
even if the receiving end has not yet been upgraded.
MSAP2000 provides a complete migration Roadmap for CAS,
CCS, and Softswitch, which will fulfill all upgrading requirements
for Service Providers.
VoIP Gateway
at COT
Before a VoIP Service Network is fully deployed, Service
Providers will still need to provide TDM DLCs and Switches, for
existing voice clients. After migration to an IP network however,
Service Providers will face severe investment losses, if they opt to
discard TDM DLC, and change their PSTN switches to
Softswitch. MSAP2000 can solve this problem by functioning as
a DLC, eliminating restrictions posed by line shortage, limited
transmission distance, and growing voice service demands.
When Service Providers are ready to transit to Softswitch, all they
need to do is add a Packet Voice Module (PVM) to their already
deployed MSAP2000 COT, and connection to Softswitch can be
established without discarding RTs or any other existing
equipment. MSAP2000 offers a seamless migration solution,
which allows Service Providers to cut down on cost and increase
revenue by retaining 80% of their existing facilities.