Electra Elite IPK II Document Revision 4CTandem Trunking (Unsupervised Conference) 2 - 953Tandem Trunking (Unsupervised Conference)DescriptionTandem Trunking allows an extension user to join two 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. Theextension user that established the conference is not part of the conversation. The conference continuesuntil either outside party hangs up. In addition, the extension user that set up the conference can endthe tandem call anytime.The number of simultaneous conference calls is limited by the number of conference circuits in thesystem. Due to this fact, the maximum number of conference calls cannot exceed the limits definedbelow:The CPUII provides two blocks of 32 conference circuits, allowing each block to have any number ofconferences with any number of internal or external parties conferenced as long as the total number ofconference channels used does not exceed the block limit of 32.Tandem Trunking could help an office manager, for example, put two outside sales people in touch. Theoffice 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 callThe office manager could terminate the conference anytime.There are four methods for Tandem Trunking: Method A - Tandem Trunking from ConferenceAn extension user can set up Tandem Trunking (Unsupervised Conference) by dialing a 2-digitservice code (#8) or a uniquely programmed Transfer key. Method B - Tandem Trunking with Transfer KeyThis method allows an extension user to easily set up an Unsupervised Conference with a callthey have placed on Hold. It uses a uniquely programmed Transfer key to set up a tandem call. Method C - Automatic Tandem Trunking on Hang UpThis method allows an extension user to easily set up an Unsupervised Conference withouthaving to place the conference call on Hold. A Class of Service option is available, which allowsor denies an extension user from automatically setting up a Conference/Tandem Trunking callby hanging up the telephone.
