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each time a call is either sent or received also can be either
digital or analog. (See the following paragraph for informa-
tion on the use of digital and analog voice channels.) To
select the voice channel type, press
M422
;
then press
1
for digital call type or
2
for analog call
type. The call type/voice channel currently in use for the call
in progress is indicated on the phone display by the
!
icon
for digital voice channel or the
/
icon for analog voice
channel.
Digital & Analog Voice Channels/Call Types
With the voice channel/call type selection set to digi-
tal, your phone uses a digital voice channel, as avail-
able, to send and receive calls. If a digital voice
channel is not available, your phone then automati-
cally searches for an analog voice channel.
With the voice channel/call type selection set to ana-
log, your phone only uses an analog voice channel to
send and receive calls. The restricted use of analog
voice channels is necessary if you are using a PCM-
CIA data interface card with your phone to send fac-
similes or communicate via modem. Note that
operating on an analog voice channel consumes the
phone battery power at a faster rate than operating on
a digital voice channel.
For optimum results and performance, you can set
your phone to the digital call type selection and use
the analog call type selection, as needed, for use with
a data interface card.
DTMF Length
Your phone can transmit tones, referred to as DTMF tones,
when the keys of the phone are pressed. These tones allow
your phone to successfully communicate with automated
telephone services such as banking transactions and credit
card inquiries. You can set your phone to transmit short
tones or long tones. (See the following paragraph for addi-
tional information on short tone use and long tone use). To
select the length of the tone, press
M423
.
Press
1
to select the short tone setting or press
2
to
select the long tone setting. Press
N
to exit the DTMF
length menu.
Short Tone Use & Long Tone Use
You can access most automated systems by setting
your phone to the short tone selection. If you experi-
ence any problems communicating with an automated
system, set the DTMF length to long and verify that
the capability to transmit tones (see the following
menu selection, Transmit DTMF Tone) is turned on.
Note that you must press and hold a key, up to a max-
imum of three seconds, to transmit a long tone.
Because transmitting long tones can result in slower
dialing, you can set your phone to the short tone
selection and only use the long tone selection, as
needed.
?
Menu Shortcut
M423
?
