Having A Three-Way Conference; To Join The Phone Conversation - Sony SPP-934 Mode D'emploi

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.
TALK/BATT
LOW lamp
(TALK)
(OFF)
SPEAKERPHONE
(SPEAKERPHONE)
lamp
When you are done talking
Press (OFF) on the handset (or press (SPEAKERPHONE) if you're at the
base phone).
Tip
While talking through the speakerphone on the base phone, if you pick up the
handset, the conversation will be continued between the handset and outside
caller.
To join the phone
conversation
Press (TALK).
The TALK/BATT LOW lamp on the
handset lights up.
The dialing keys on the handset
light up for 10 seconds.
If you are at the base phone, simply
press (SPEAKERPHONE).
The SPEAKERPHONE lamp on the
base phone lights up.
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Telephone Features
US