NEC 5 - page 562

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.