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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.
PC Connection
Connecting your phone to the PC via USB or Bluetooth. See 2.9 for more details.