Subscribers can use this service so incoming calls ring simultaneously on multiple alternative phones in addition to the called phone. The call can be answered on any one of these phones, at which point the others also stop ringing.
If the primary phone is busy, the service can be configured to still ring the other phones, or to handle the call in the usual manner – for example diverting to voicemail without ringing alternative phones.
The subscriber (and other group members) can set/modify service rules from any phone, using IVR, or via a service web-site, smart phone widget or from their mobile using USSD menus.
This service can be enhanced to ring phones in a defined sequence (rather than simultaneously), and to enable outbound calls from any phone to use the same CLI.