UNIVERGE SV8100 Issue 13.0Tandem Ringing 2 - 1627Tandem RingingDescriptionTandem Ringing allows an extension user to have two telephones with one telephone number. Forexample, extension 105 (the master telephone) sets Tandem Ringing with extension 106. Whenextension 105 receives an incoming call, both extensions 105 and 106 ring. Callers would dial themaster extension number (extension 105 in this example). When either the master telephone or slavetelephone is in use, the other telephone cannot be used for outgoing calls or incoming calls.The multiline terminal must be paired with a single line telephone. It cannot be paired with anothermultiline terminal.A single line telephone must be paired with another single line telephone. It cannot be paired with amultiline telephone.Conditions The slave telephone cannot call the master telephone. DT700 IP Multiline terminals do not support Tandem Ringing. Extension numbers up to eight digits can be registered on the Tandem Ringing key.Extension numbers over nine digits cannot be registered. If Tandem Ringing is enabled, and one of the extensions is busy, no additional calls can bereceived or placed from either telephone. Tandem Ringing can support up to 128 pairs of Tandem Ringing extensions. The extension user which enables Tandem Ringing is the master, while the slave telephoneis the extension entered by the user while setting up the feature. A slave telephone ignores the settings for DND and follows the master telephone settingsinstead. Voice Call is not supported on a multiline terminal with Tandem Ringing. Calls placed on Hold while Tandem Ringing is active, immediately recall if the handset isplaced on-hook. A slave telephone ignores the settings for Ring Groups and follows the master telephonesettings instead. To transfer calls between the two Tandem Ringing stations, a System Park Orbit should beused. A message waiting indication set for the master telephone only lights the message waitingLED on the master telephone.
