LevelOne VOI-7011 - Manual (Page 101)

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5.5. 3-Way Conference Calling
Applications:
The Call Transfer and 3-Way Conference Call applications are
for calls among Parties A, B, and C. Three parties are
registered to SIP server with either fixed real IP or private IP.
There are two kinds of call transfer; Blind Transfer and
Attendant Transfer.
Blind Transfer:
1. Party A calls Party B.
2. While in conversation, Party B may press Transfer key,
and should hear a dial tone.
3. Party B press [Party C number] # and hang up to transfer
to Party C.
Attendant Transfer:
1. Party A calls Party B.
2. While in conversation, Party B may press Transfer key,
and should hear a dial tone.
3. Party B press [Party C number] # and talk to Party C.
4. Hang up from Party B, and then Party A will transfer and
connect to Party C.