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Tandem Trunking (Unsupervised Conference)
544 ◆ Features Aspire Software Manual
Tandem Trunking (Unsupervised Conference)
Description
Tandem Trunking allows an extension user to join two outside callers in a trunk-to-trunk Confer-
ence. (Depending on your software level, it may be possible to conference 3 or more trunks with
Tandem Trunking.) The extension user can then drop out of the call, leaving the trunks in an Unsu-
pervised Conference. The extension user that established the Conference is not part of the conversa-
tion. 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 simultaneous Conference calls is limited by the number of Conference circuits in the sys-
tem. Due to this fact, the maximum number of Conference calls cannot exceed the limits defined in the
above table.
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 four methods for Tandem Trunking:
● Method A - Set Up Without Transfer Key
An extension user can set up Tandem Trunking (Unsupervised Conference) by dialing a two-
digit service code (#8) or a uniquely programmed Transfer key.
● Method B - Tandem Trunking with Transfer Key
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 programmed Transfer key to set up a tandem call.
● Method C - Automatic Tandem Trunking on Hang Up
This method allows an extension user to easily set up an Unsupervised Conference without
having to place the conference call on Hold. A Class of Service option is available, depending
on your software version, which will allow or deny an extension user from automatically set-
ting up a Conference/Tandem Trunking call upon hanging up the phone.
Aspire S Aspire M/L/XL
• NTCPU provides 32 conference circuits, allowing each
block to have any number conferences with any number
of internal or external parties conferenced as long as the
total number of conference channels used does not
exceed the limit of 32.
• Automatic conference on Hang Up available with soft-
ware 2.10+.
• Trunk Disconnect Continue and Disconnect Codes
require software 4.0E+.
• Multiple Trunk Conference with 3 or more trunks
requires software 4.93+.
• NTCPU provides 2 blocks of 32 conference circuits,
allowing each block to have any number conferences
with any number of internal or external parties confer-
enced as long as the total number of conference channels
used does not exceed the block’s limit of 32.
• Automatic conference on Hang Up available with soft-
ware 2.10+.
• Trunk Disconnect Continue and Disconnect Codes
require software 4.0E+.
• Multiple Trunk Conference with 3 or more trunks
requires software 4.93+.