Having A Three-Way Conference - Sony SPP-935 Manual De Instrucciones

Having a three-way conference

The handset and the base phone operate like two extensions on the
same line. Both phones can operate at the same time, so that you, the
outside caller, and the person at the other phone can engage in a three-
way conversation.
When you are done talking
Press (OFF) on the handset/(SPEAKERPHONE) on the base phone,
respectively.
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EN
Advanced Features
To join the phone
conversation
Press (TALK/FLASH).
If you are at the base phone, simply
press (SPEAKERPHONE).
(OFF)
(SPEAKERPHONE)