User`s guide

1-2 Preliminary November 23, 1998 MultiVoice Gateway for the MAX— User’s Guide
Introducing MultiVoice Gateway concepts
What is MultiVoice for the MAX?
In addition to data, packets contain addressing information, which routing devices use to send
information to its destination. Routing devices maintain tables which instruct them how to
direct packets. Dynamic protocols, like RIP or OSPF, define methods that routing devices use
to update each other as networking environments change.
In the past, the PSTN was the only network supporting voice communication. With the
introduction of MultiVoice Gateway, voice traffic can be sent over IP-based packet-switched
networks.
What is MultiVoice for the MAX?
In response to customers wanting to utilize their existing IP networks to support voice
communications, the International Telecommunications Union (ITU) has created the ITU-T
H.323 standards. H.323 standards define a framework for the transmission of real-time voice
communications by means of IP-based packet-switched networks.
In particular, H.323 standards define a Gateway and a Gatekeeper. Gateways connect the
PSTN to the IP-based network. Callers dial a local Gateway, which provides them access to the
IP network and, ultimately, to the destination phone. The Gatekeeper manages the network,
supporting all Gateways, user profiles, and authentication.
Basic Multivoice network
MultiVoice for the MAX implements the H.323 direct call model for Voice over IP networks.
Figure 1-2 shows an example of a MultiVoice network. Two Gateways connect Caller A to
Caller B. A computer running the MultiVoice Access Manager (MVAM) is the Gatekeeper.
Figure 1-2. Example of a MultiVoice network
When Caller A dials Caller B, the following events occur:
1 Caller A dials MultiVoice Gateway 1, and enters their PIN authentication (if required) and
Caller B’s phone number.
2 MultiVoice Gateway 1 establishes a session with the Gatekeeper.
PSTN
PSTN
IP network
MultiVoice
Gateway 1
MultiVoice
Gateway 2
Gatekeeper
Caller B
Caller A