Administrator's Guide

Features and technical reference
555-233-5061906 Issue 5 October 2002
FX — Foreign Exchange
An FX trunk is essentially a CO trunk that connects your switch directly to a
central office outside your local exchange area. Use FX trunks to reduce long
distance charges if your organization averages a high volume of long-distance
calls to a specific area code.
IP Trunks — Internet Protocol Trunks
IP trunks allow Avaya MultiVantage to route voice calls and faxes over a local- or
wide-area TCP/IP network. Use IP trunks to reduce long-distance charges by
routing calls over the Internet or your intranet.
NOTE:
The origin and destination switches must both have the special hardware and
software needed to route telephone calls over IP networks. See the
Administration for Network Connectivity for Avaya MultiVantage™
Software for more information.
ISDN — Integrated Services Digital Network
ISDN trunks are digital trunks that can integrate voice, data, and video signals and
provide the bandwidth needed for applications such as high-speed data transfer
and video conferencing. ISDN provides end-to-end digital connectivity and uses a
high-speed interface that provides service-independent access to switched
services. Through internationally accepted standard interfaces, an ISDN provides
circuit or packet-switched connectivity within a network and can link to other
ISDN-supported interfaces to provide national and international digital
communications. ISDN trunks can also efficiently combine multiple services on
one trunk group.
PCOL — Personal Central Office Line
A personal central office line is one dedicated trunk that links a group of phones to
the local central office or to another switch in a private network. A PCOL group
can have 1–16 phones, and each phone can have one or more appearances for the
personal central office line. You may administer a PCOL group as a CO, FX, or
WATS trunk group. Use a PCOL line when one or more users need a direct,
dedicated connection to the public network or to another switch.