Sony Ericsson P910 用户手册

Teletype (TTY) accessory, text phone, is an aid for people with 
speech impairments.

1. Connect the TTY device to the accessories connector at the 

base of the P900.

2. In Phone, go to 

 and select 

the check box to set the P900 into TTY mode.

Refer to the TTY device user manual to find out how to use the 
device. It may be necessary to use an adapter between the TTY 
device and the P900.

You can still make normal calls with the P900 in TTY mode but 
other accessories such as handsfree will not work properly.

Do not open the Flip during a TTY call. It will impair the quality 
of the connection.

Note Support for voice carry over (VCO) and hearing carry 
over (HCO) is handled through the TTY device and not through 
the phone.

Alternate line service (ALS) allows you to have more than one 
line, and more than one phone number, to one SIM subscription. 
If you are not subscribed to ALS, these dialogues and settings 
are hidden.

Using ALS, you can select which line to use for outgoing calls. 
You can use the first line for any function, while the second line 
can be used for speech only.

Incoming calls can be received at both lines at any time. The 
name of the line is shown and the ring signal defined for the line 
is used.

The preset line is shown by the icon in the status bar. If you want 
to use the other line:

•

With the Flip closed, press 

 and select 

 or 

 depending on the previously preset line.

•

With the Flip open, tap 

 and select 

 or 

 depending on the previously preset line.