AT&T Merlin Legend MLX-10 User Manual page 132

Features
To Use Camp-On
If you try to transfer a call and reach a busy extension,
1.
or if the person receiving the transfer wants to wait
before taking the call, do one of the following:
Press Camp-On.
Press Feature and dial 57.
To Answer a Camp-On Call
Answering a call that has been transferred to your phone and
left there with Camp-On is the same as answering a Call
Waiting call.
Do one of the following:
1.
If you have more than one call waiting, you receive them in
the order in which they arrived.
If your extension was busy when the call arrived,
the call rings as soon as an SA or ICOM button
becomes free. Answer it as you would any
other call.
If your extension was not busy when the call
arrived, when you are ready, pick up the call by
pressing Feature and dialing 87.
Transfer 5-81