User's Manual

Table Of Contents
113
other handset features—TTY
Important: When you are using HCO,
the sound coming from your handset
speaker may be uncomfortably loud.
Use caution when putting the phone to
your ear. (For information on setting the
volume of your handset speaker, see
“volume” on page 18.)
options
TTY:
You type and read text on your TTY
device.
VCO
:
(Voice-Carry-Over)You speak into
your phone and read text replies on your
TTY device.
HCO:
(Hearing-Carry-Over) — You type text
on your TTY device and listen to voice
replies on your handset speaker.
45.45
:
The baud rate required for TTY calls
within the U.S.
50.00:
The baud rate required to make TTY
calls outside the U.S.