Olympia OL2400, Руководство пользователя

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2) Press the number of the required handset or ‘*’ key for all handsets.
1 .. 4 *
OR
Press the UP/DOWN key to select the desired handset(s) in the menu, then
press PHONE or PROG. (the external call is put on hold)
, /
3) Without waiting for an answer, press PHONE, or place the handset in the
charger.
6.9 Call Back
After call forwarding, a callback is generated in the forwarding handset if the
forwarded call is not answered within a certain period. If there is no CID
information available ‘Call back’ is shown in the display; otherwise normal
CID information is shown. If the returned call isn't answered within a certain
period, the phone automatically goes on hook.
6.10 Conference
It is possible to establish a conference between two handsets and the external
line.
But only the first handset connected to the external line is allowed to transmit
DTMF digits to the line. If digit keys are pressed on the second handset, they
are blocked in the base station.
If the handset has a connection to the external line, a conference is immediately
established when another handset goes off hook by:
Press the key
If a handset has an active connection (internal or external) and another
connection on hold, a conference can also be established by holding down the
key.