Growing Your Network - Avaya one-X Quick Edition System Administration Manual

Chapter 1: Technical Overview
Figure 3 shows a typical SIP service provider configuration. The service provider's SIP network
provides a gateway to the Internet, a SIP proxy and registration server, and a session border
controller.
Figure 3: SIP Service Provider Configuration
Session Border
Controller
(Optional)
Proxy and
Registration
Server

Growing Your Network

In a small office, a single network serves the local user community. Users have telephones and
can call each other by dialing an extension number from the Corporate directory.
PSTN lines may be connected to the network through one or more PSTN gateways. To place
external calls to the PSTN, users must dial the prefix before dialing the PSTN number. External
calls are routed via PSTN service provider trunks (PSTN lines).
Calls to and from a SIP (VoIP) network are supported through the SIP interoperability feature.
To place external calls to a SIP network, users must dial the prefix before dialing the number.
External calls are routed via a SIP service provider network (Internet).
Tip:
Refer to
Tip:
14
Avaya one-X Quick Edition Release 3.1.0 System Administration Guide
Internet Firewall
(VoIP)
PSTN
Service
Provider
SIP
Network
Dial Plan on page 56 for your dialing prefix.
Local Area Network
(NAT)
PSTN Gateway
Administration
cytbsrvp LAO 041206
May 2007