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8) Door Substation
Model HF-640S
PV Type
HF-640S
Note.
1. Making a call from the door station to the master station
having its Privacy switch in ON transmits a brief calling
tone to the door station only twice, white transmitting a
continuous calling tone to the master station.
2. The No.200 programming (Master/Sub relationship) must
be performed in the exchange to call a specified master
station.
< Making a call >
1. Pressing a button calls the specified master station.
2. Speak when a calling tone stops.
3. When a busy tone is heard, simply wait. You are put
through the master station as soon as its line is freed.
4. If there is no response even after a calling tone has
stopped, press the button again and again. The call-
ing tone is sounded each time the button is pressed.
5. Conversation or continuous calling tone is terminated
unless the button is pressed every 30 seconds.
9) Talk-back unit Model TK-20
< Making a call >
[When calling with the audio trigger function]
When the sound into the speaker exceeds the preset
volume, the specified master station is called.
[When calling with the call switch]
1. Pressing the talk-back station call switch calls the
specified master station.
2. Talk to the specified master station after a calling tone
is terminated.
3. Simply wait after a busy tone (intermittent single
tone) is heard.
As soon as the called station's line becomes free,
your call is automatically connected.
Note. Be sure to set the audio trigger selector switch on the
talk-back unit to ON.
<Response>
1. Talk to the specified master station after a calling tone is
terminated.
Note. The No.200 programming (Master/Sub relationship)
must be performed in the exchange to call a specified
master station.
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