XEN Topaz
NEC Business Solutions Ltd
Features and Specifications Manual
Chapter 4 - 307
D
oc. N
o. 8846 -
Release
2.0
Apr
il 2005
Tandem Trunking (Unsupervised Conference)
• Description
Tandem Trunking allows an extension user to join two or more outside callers in a
trunk-to-trunk Conference. The extension user can then drop out of the call, leaving the
trunks in an Unsupervised Conference. The extension user that established the
Conference is not part of the conversation. The Conference continues until either
outside party hangs up. In addition, the extension user that set up the Conference can
end the tandem call at any time.
The number of Conference calls is limited by the number of Conference circuits in the
system. Due to this fact, the maximum number of Conference members cannot exceed
32.
Tandem Trunking could help an office manager, for example, put two outside sales
people in touch. The office manager could:
•
Answer a call from one salesperson
•
Place a call to the second salesperson
•
Set up the trunk-to-trunk Conference
•
Drop out of the call
The office manager could terminate the Conference at any time.
There are two methods for Enhanced Tandem Trunking:
•
Method A - Set Up Without Transfer Key
An extension user can set up Tandem Trunking (Unsupervised Conference)
by using the CONF key. This option uses a uniquely programmed Transfer
key to set up a tandem call.
•
Method B - Tandem Trunking on Hang Up
This method allows an extension user to easily set up an Unsupervised
Conference with a call they have placed on Hold. It uses a uniquely pro-
grammed Transfer key to set up a tandem call.
Conditions
A. Tandem Trunking requires analogue loop start trunks with disconnect supervision
or ISDN trunks.
B. The maximum number of trunk-to-trunk conferences allowed is determined by the
Conference feature setup. See Programming below.
Default Setting
Disabled.
• Programming
Tandem Trunking Method A - Tandem Trunking from Conference
14-01-04: Basic Trunk Data Setup - Transmit Gain Level for Conference and
Transfer Calls
Select the CODEC gain type used by the trunk when it is part of an
Unsupervised Conference.
