Mobile extension service – AASTRA 4422 IP Office for MD Evolution User Guide User Manual

Page 88

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Group Services

MD Evolution – Dialog 4422 IP Office

88

You have the option of carrying out a simplified call transfer

between extensions within your personal group (other than from

your Dialog 4422 IP Office 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.

Notes:

It is your system administrator’s responsibility to define your

personal group. Contact him/her as needed.

On an associated digital Dialog 4200 extension, a call is

placed on hold by pressing the line key associated with the

current call. On an associated DECT cordless extension, a

call is placed on hold by pressing the “R” key.

Mobile Extension Service

If you frequently travel outside the office, you will generally have a

GSM mobile phone in addition to your Dialog 4422 IP Office 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 authorisation to access.

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