875Mobile ExtensionDescriptionA mobile extension is an external telephone (preferably a mobile phone) linked to the UNIVERGESV9100 via a Proxy Port to operate as an internal single line telephone extension. The extension sendsDTMF signals to the system allowing access to the system features. A registered Mobile Extension usesone analog port (ports are reserved in groups of two), however, no PCB support (analog or digital) isrequired. The Mobile Extension port must be an unequipped extension port on the UNIVERGE SV9100system - no physical telephone is required on the SV9100 system.A mobile extension cannot be used as a voice mail port.This feature can currently be used with ISDN PRI trunks or SIP trunks.It is recommended to use this feature with an ISDN PCB (PRI or BRI), however, analog trunks can be used aswell.To provide a proper disconnect, Disconnect Supervision is required for the trunks used for this feature.The Mobile extension internal extension number (Proxy Port) is linked to a speed dial bin to provideintegration.If all external trunks are busy when a call is made to the mobile extension, ringback tone is presented giving theimpression the phone is ringing.A DID is directed to the Mobile Extension internal extension number (Proxy Port), and to provide internaldial tone to the Mobile Extension, the incoming calling line identification of the Mobile Extension mustmatch the number in the Speed Dial bin. Once internal dial tone is presented, the operation is similar toa single line telephone user lifting the handset.Any DID with Program 22-11-13 enabled, provides internal dial tone to the Mobile Extension, must havean incoming calling line identification that matches exactly the number of any Mobile Extension SpeedDial Bins.In the absence of DIDs, the VRS can be used to transfer the Mobile Extension call to the MobileExtension extension number. This provides internal dial tone when the calling line identification is
