Avaya Communication Manager Administrator's Manual page 1553

Valid entries Usage
DIOD DIOD trunks are two-way trunks that transmit dialed
digits in both directions. In North America, use tie trunks
for applications that require two-way transmission of
dialed digits. Allows Inband ANI.
DMI-BOS Digital Multiplexed Interface - Bit-Oriented Signaling
(DMI-BOS) trunks allow communication with systems
using DMI-BOS protocol. DMI-BOS trunks allow inband
ANI.
FX An FX trunk is essentially a CO trunk that connects your
server running Communication Manager 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.
ISDN Use ISDN trunks when you need 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 trunks can
also efficiently combine multiple services on one trunk
group.
Use ISDN for Network Call Transfer. For more
information, see Avaya MultiVantage Call Center
Software Release 11 — Network Call Redirection.
You cannot enter isdn unless the ISDN-PRI field, the
ISDN-BRI Trunks field, or both have been enabled on
the System-Parameters Customer-Options screen.
RLT Release Link trunks work with Centralized Attendant
Service in a private network.
SIP Use SIP trunks to connect a server running
Communication Manager to a SIP service provider's
server or switch.
Tandem Tandem trunks connect tandem nodes in a private
network. Tandem trunks allow inband ANI.
Trunk Group
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Issue 1 June 2005 1553