Panasonic HYBRID IP-PBX KX-TDA30 - Manual (Page 61)

1.4 During a Conversation
User Manual 61
• To retrieve the held call, press the TRANSFER button, Recall/hookswitch.
• Even if you go on-hook while transferring a call, it is transferred.
• After the call is transferred, the line becomes idle.
Customising Your Phone
• 3.1.3 Customising the Buttons
Create or edit an ISDN-Hold button.