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Internal conference calls
Athird party can be called into an existing conversation. Conference calls are only possible inter-
nally. The door intercom cannot take part in a conference call. Everyone who partakes in the con-
versation can call in another third party. As a conference call is private, no third party can chan-
nel uninvited into the call.
Example: Two parties are talking and wish to have a third party join the conversation and form
a conference call.
1. Dial the internal number of the third
party.
2. Hold conversation.
3. To leave the conference call,
replace the handset.
The third party’s extension rings (maxi-
mum 20 sec.). Both of the original callers
hear the ringing tone.
If the extension is off the hook, a busy tone
will be heard for 3 seconds.
The conference call is established as soon
as the selected extension is picked up.
The conversation can continue.
