AASTRA 4425 IP Vision for MD Evolution User Guide - Manual (Page 143)

143 MD Evolution – Dialog 4425 IP Vision
Group Services
Mobile Extension Service
If you frequently travel outside the office, you will generally have a GSM
mobile phone, in addition to your Dialog 4425 IP Vision 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 its 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. Otherwise, authentication can be carried out by manually
dialling the dummy internal number associated as well as the corre-
sponding 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
authorisation 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 conjunction with a personal group. However, the GSM
mobile telephone will still retain its regular number.
Note: The Mobile Extension service is also totally applicable
to your residential extension connected to the pubic ISDN
network. Whenever necessary, contact your system admin-
istrator for more information concerning the availability of
this specific service for your telephone facility.