Product Description: Features > Advanced Call Handling

Twinning allows a primary extension and a secondary number (extension or external) to operate together as a single telephone, When a call is presented to the primary phone the secondary will ring. If the primary telephone does not ring, for example in Do Not Disturb, the secondary phone will not ring.

Internal Twinning

This is typically used in scenarios like workshops or warehouses where team supervisors may have a desk with a fixed phone but also have a wireless extension (e.g. DECT). When a call is made from either twinned phone, the call will appear to have come from the primary phone (when the secondary is an extension on the IP Office system). Other users of the system need not know that the supervisor has two different phones. The supervisor’s Coverage Timer and No Answer Time are started for the call and if the call is not answered within that time, the call will be delivered to available coverage buttons (if applicable) and then Voicemail (if applicable).

The following features are supported with internal twinning

Mobile (external) Twinning

A typical use for Mobile Twinning would be for a salesperson who has a desk extension but is often out of the office. They can give out one phone number to clients, but it will ring their mobile/cell phone as well as the desk extension. External mobile devices can be set as twinning targets even if the primary telephone is logged out (e.g. in the case of a "virtual" extension).

From IP Office 4.2 onwards, the following additional Mobility features are available in addition to simple mobile twinning (but need to be separately enabled per user in IP Office Manager):

Mobile Call Control

This allows a user who has answered a twinned call on their mobile cell phone to dial a DTMF sequence **(star-star) to put the call on hold and receive IP Office system dial tone. The user will then be able to perform supervised and un-supervised transfers, shuttle (switch between held calls), and conference (Conference add and transfer to a meet-me conference).

Mobility Callback

This feature, available from Release 6, allows a user to make an outgoing call from IP Office from their mobile phone. The user dials a specific number on the IP Office system which rejects the call and then calls the mobile phone back. On answering, the user is presented with dial tone and can proceed to dial as with Mobile Call Control. The benefit is that in some territories the initial call from the mobile phone will be free since it is never answered, enabling centralized billing and greater control over costs.

Avaya one-X Mobile Client Support

IP Office supports the Avaya one-X Mobile 'Single Mode' Client running on selected Symbian Single-Mode or Windows Mobile 5 or 6 handsets. This provides a graphical interface for call control and allows a one-number service for both incoming and outgoing calls. For a full list of supported handsets see http://support.avaya.com. IP Office systems supporting one-X Mobile require a dedicated DID/DDI number for each feature required (e.g. hold, transfer).

Mobile Call Control and one-X Mobile support require twinned calls to be routed through specific trunk types on IP500/IP500 V2 only:

In IP Office Release 6, the Mobility features are available to users with either a Mobile Worker or Power User license.

With either internal and external twinning, users may be allowed to enter a twinned number, or may just be able to activate/deactivate the twinning function depending on administrative settings. Such user activation can be achieved through deskphone buttons, Phone Manager or VoiceMail Pro.

The following types of calls are eligible for twinning:

*Requires IP500/IP500 V2 BRI, PRI or SIP trunks and Mobile Call Control to be enabled for that user.