switel DF 1851 Mode D'emploi page 106

Telephoning
Transferring an external call to another handset
Menu . . .
Call Toggle
Menu . . .
Menu . . .
3-Party Conference
Menu . . .
☞
Any handset hangs up during a conference call will leave the other
handset still in connection with the external call.
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During an external call . . .
Press Menu, select INT Call.
Select the desired handset or ALL and press OK.
The external call is put on hold.
When the called handset answers you can announce the call
transfer.
Press the On-Hook key. The call will be transferred.
Während eines Externgespräches . . .
Press Menu, select INT Call.
Select the desired handset or ALL and press OK.
The external call is put on hold.
Press Menu, select Call Toggle and press OK. In this way
you can toggle between the two calls.
During call toggles (see above) . . .
Press MENÜ, select Conference and press OK.
Press C.End to get back to call toggle.