Administrator's Guide

Trunks and trunk groups
Issue 5 October 2002 1903555-233-506
■ In a call involving more than one telephone, one of the telephones may
press the Flash button, and another telephone may dial the phone number.
The telephone that dials the phone number is not required to have a Flash
button.
■ If the far-end/CO does not support custom services, the call may be
dropped by the far-end/CO on sending the flash signal or the signal may be
ignored and a click-click sound is heard.
Trunks and trunk groups
Trunks connect Avaya MultiVantage to other pieces of equipment (adjuncts) and
to other switches. In general, trunks connect your switch to one of four things:
■ the public telephone network
■ a private telephone network
■ the Internet or a private intranet
■ switch adjuncts, such as a loudspeaker paging system or a source for music
or announcements
When trunks of the same type are used for the same application, assign them to
the same trunk group. A trunk group allows you to assign service characteristics
to the group rather than administering each trunk individually.
NOTE:
Trunks and access endpoints consume the same resource. The sum of trunks
and access endpoints cannot exceed the total number of trunks allowed on
your system.
This chapter contains information about the most common analog and digital
trunks. Specialized trunks such as Advanced Private-Line Termination (APLT),
tandem, release-link, and DMI-BOS trunks are not covered in this manual. See
Overview for Avaya MultiVantage™ Software and Administration for Network
Connectivity for Avaya MultiVantage™ Software for information on these trunks.
Brief description
Avaya MultiVantage supports the following basic trunk types.
Access
Used in ETN, access trunks connect satellite switches to the main switch. Unlike
tandem trunks, access trunks do not carry TCMs and thus allow satellite callers
unrestricted access to out-dial trunks on the main switch.