Mobile Extension Service - Aastra DT690 User Manual

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Note: It is your system administrator's responsibility to define your personal
19.6

Mobile Extension Service

If you frequently travel outside the office, you will generally have a GSM mobile
phone in addition to your DT690 extension.
Once again, without truly being a group service, the Mobile Extension service
may be of use to you. Its purpose is to allow external users of GSM mobile
phones most particularly to access your company's network, and thus be able
to use the system as if they were internal users.
In practice, a Mobile Extension terminal is managed in the same way as a
dummy internal user associated with the external GSM mobile number.
To process these calls, the GSM mobile telephone connects to a specific
DID number for the facility, which accesses the Mobile Extension server. By
connecting through the public ISDN network, the GSM mobile telephone is
then automatically authenticated by its external calling number. By default,
authentication can be carried out by manually dialling the dummy internal
number associated as well as the corresponding user's password.
Once authenticated, the GSM mobile telephone user may call any internal
or external number, just as if he/she were dialling from the internal dummy
extension. The user's identity that is transmitted to the called parties is the
information for the internal dummy extension.
The mobile GSM telephone user may, in the same way, gain access to all
telephone services to which the internal dummy extension has authorization to
access. The GSM mobile telephone may also be directly called through the
number associated with the internal dummy extension. This may be used in
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You can be contacted through just one number, common to your entire
personal group.
When you place a call to any party, you are identified by your personal
group number, no matter what extension you use to place your call.
An incoming call is presented on all of your personal group's extensions,
allowing you to answer it on any of them. If all extensions in your personal
group are free, they will all ring simultaneously. If you have an ongoing call
on any given extension, the call is presented to you on that extension in the
usual way (call waiting tone, and so on.) On each of the other extensions -
when it is possible - the call will be presented with silent ringing, and the
usual call information will be displayed on the screen.
You have the option of carrying out a simplified call transfer between
extensions within your personal group (other than from your DT690
extension). To do so, simply place your current call on hold and hang up.
The call is then represented on all of your personal group extensions;
therefore you may pick it up on any of them.
group. Contact him/her as needed.
Group Services
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