Polycom IP 650 - Manual (Page 51)

Using the Basic Features of Your SoundPoint IP 650 SIP Phone
3 - 11
2. Press or the Confrnc soft key to create a new call.
The active call is placed on hold.
3. Call the second party.
4. When the second party answers, press or the Confrnc soft
key again to join all parties in the conference.
To split a conference call:
>> Press the Split soft key to split the conference.
Both parties will be on hold.
To end a conference call:
>> Press the EndCall soft key or hang up.
The other parties will continue to be connected.