Alcatel-Lucent 300 User Manual page 23

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Example: sending DTMF signals
During a call, you sometimes have to send DTMF signals, for example, for a voice message service,
an automatic switchboard or when remotely consulting an answering machine:
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inconversation
Transfer
in conversation
apply all digits dialled are then sent in
To deactivate the function, from the Send MF code screen, re-enable.
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inconversation
Send MF Code?
select the 'send mf code' icon
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inconversation
Send MF Code?
dtmf
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