ZTE F858 - Manual (Page 77)

77
CTM Set
CTM (Cellular Text Telephone Modem) is a text based communications protocol to offer support to
hearing and speech impaired people. Hearing or speech impaired persons can communicate using
a teletype (TTY) terminal connected to the mobile phone via a CTM Modem. The TTY signals are
sent alongside speech so it is possible to configure the system to enable speaking and hearing as
well as typing or receiving text to the TTY device. See below for the options available:
•
Full: Text entered on the terminal is sent to the other party. Received text from the
other party is displayed on the terminal.
•
Talk&Read: Received text is displayed on the terminal and you can speak to other
party.
•
Write&Hear: Text entered on the terminal is sent to the other party and you can hear
the incoming speech from the other party.
•
Off: All CTM is disabled and you can use the phone as normal.
Screen Lock
•
If Screen Lock configuration is ON, you can not use the Play keys on the front panel.
You can unlock it by long pressing camera key at right side of handset.