Alternate Line Service (Als) - Sony Ericsson P900 White Paper

Alternate Line Service (ALS)

P900/P908 White Paper, December 2003
Alternate Line Service (ALS)
General
ALS 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.
Line Naming
The default line names (line1/line2) may be changed by the user, e.g. Business and Personal.
Line Selection and Indications
The currently selected line for outgoing calls is indicated by an icon. Tapping the icon allows the user to
select the alternate line for making a call. When a call is received, the incoming call dialog will show which
line the call is being received on.
Call Log
The call log entries will contain information which line was used for the incoming and outgoing call.
Line Facilities
Facilities such as Call Waiting, Call Barring, Call Divert, and Ring Tones may be setup and customized for
each line individually. The P900 dialogs will automatically adjust to allow for the two lines when ALS is used.
CSP settings are also individual to each line, but if there is only one CSP it will be applied to both lines.
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