Avaya EE Networking Betriebsanweisung PDF herunterladen (Seite 7)

P0910464 Issue 01 Enterprise Edge Networking Operations Guide

Introducing Enterprise Edge

Routing and IP Services

Enterprise Edge supports the following routing and IP Services:

• Routing Services

– IP Routing Protocol

– RAS Service and Dial In Capabilities for Management Purposes Only

– RIP

– Packet Filtering

• IP Services:

– DHCP

– DNS

– Web Caching

• VoIP (voice over IP) Service

VoIP is a term used in IP telephony for a set of facilities that manage voice

information delivery using Internet Protocol (IP). VoIP sends voice information

in digital form in discrete packets rather than in the traditional circuit-

committed protocols of the public switched telephone network (PSTN). A

major advantage of VoIP and Internet telephony is that it avoids ordinary tele-

phone service tolls.

VoIP derives from the VoIP Forum which promotes the use of ITU-T H.323 as

the standard for sending voice (audio) and video using IP on the public Internet

and within intranets. The VoIP Forum also promotes the use of directory service

standards so that users can locate other users and the use of touch-tone signals

for automatic call distribution and voice mail.

In addition, VoIP uses the real-time protocol (RTP) over IP to help ensure that

packets get delivered in a timely way. Using public networks, it is currently

difficult to guarantee Quality of Service (QoS). Better service is possible with

private networks managed by an enterprise or by an Internet telephony service

provider (ITSP).

When using VoIP a business positions Enterprise Edge as a gateway. The

gateway receives packetized voice transmissions from users within the

company and then routes them to other parts of its intranet (local area or wide

area network) or sends them over the public switched telephone network.

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Avaya EE Networking Betriebsanweisung Seite 7