Interquartz 98583 - Manual (Page 9)

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Start / Stop
Push to start the timer, push again to stop it. Note, the timer will automatically
start when the telephone handset is lifted (or the handsfree button is pressed)
and will stop when the handset is replaced. The elapsed time will show on
the LCD for a period of 8 seconds and then the display will revert to clock.
Tone button
This button is used to send signals in tone ( DTMF ) format regardless of the
tone / pulse switch setting. Its main use is for accessing computers, home
banking, answering machines etc. when the telephone is connected to a
pulse exchange. An access pause will automatically be inserted whenever
this button is pressed.
Clock / Timer
Selects different display modes. In the off-line state the display will toggle
between the time ( default ) and the timer. If the telephone is connected to
the line the display will rotate each time this button is pressed, in the sequence
Dialled number
Time
Timer
On / Off hook button
Used to monitor an outgoing call. In this mode the user may dial and listen
to the call progress without lifting the handset. Once the call is answered
then either the handset must be lifted or the speakerphone button must be
pressed, to continue the conversation.
If the called party does not answer the telephone within 60 seconds, the line
will be released. A warning tone, of two short beeps, will be heard 5 seconds
before the line release.
This feature is storable in memory.