The Mitel components that enable Dynamic Extension include External Hot Desking and Personal Ring Groups (PRG). External Hot Desking
External Hot Desking allows external devices (usually identified by an external phone number) to be hot desk devices. This enables calls made to the user’s hot desk number to ring any device associated with that user (see Personal Ring Groups below).
Through External Hot Desking, when a user calls into the business communications system, it will authenticate the device and MCD will recognize the user as being permanently logged on. From there, the user can make multiple calls without leaving the business PBX. Once logged in, the user gains access to all the attributes and features of her Mitel IP desk phone. Personal Ring Groups
The Personal Ring Groups (PRG) feature allows a collection of devices (directory numbers) to be associated with a single user. When the user’s primary number is called, MCD rings all associated devices (up to eight) simultaneously. In this way, the primary number acts as the unique PBX identity or directory number. Similarly, whichever device in the PRG a mobile worker uses to make a call or access a feature will take on the user’s identity including all his rights and permissions.
In addition, PRG’s Handoff feature allows calls to be pushed or pulled between devices in a group. A push passes the call to the group, where it can be answered by any other enabled device. A pull takes an in-progress call away from another device. Group Presence
Group Presence allows users to indicate which device/identity/number in their groups is available to receive calls. For example, if a user is in the office, she would set up her wireless, mobile and home numbers as “absent” from a ring group. This does not remove them from the group, but simply ensures they do not ring when a call comes in. Alternatively, when the user is at home covering off-hours calls, she can make her cellular phone “present” in the group to ensure it receives any incoming calls.
Group Presence can be selected for voice hunt groups, Name Tag hunt groups, ring groups, Personal Ring Groups, and ACD agent groups. The Group Presence option is controlled by Class of Service.