Sony Ericsson P900 White Paper page 18

P900 New Features in Detail P900/P908 White Paper, December 2003
Alternate Line Service (ALS)
ALS (Alternate line service) allows the user to have more than one line (more than one telephone number)
allocated to a single SIM subscription. The user can select which line will be used for an outgoing call, while
incoming calls can be received on either line at any time. However, the second line may only be used for
speech calls.
If the user is not subscribed to the ALS service, then all of the ALS settings dialogs are hidden and are never
shown.
Customer Service Profiles (CSP) facilities added
A CSP held on a SIM card is able to automatically adjust the features provided by the phone so that
particular features are not shown, typically by removing items from menus. However, some actions that are
hidden may still be carried out using Service strings – the CSP does not prevent the user from doing this.
For details of which features can be controlled by CSP in the P900 refer to ' Customer Service Profile (CSP) '
on page 73.
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