Here is a list of things you can do to when you call another extension within the same office/home and its user is busy handling another call.

	Send a call waiting tone/Off-hook Call Annoucement
	Join the conversation in conference mode
	Monitor the conversation
	Activate the busy extension's message waiting lamp
	Have the busy extension automatically ring your phone once it becomes available

 

You can inform the called extension user that your call is waiting:

While hearing a busy tone, Press

Depeding on the other called user's telephone, the "Off-hook Call Announcement (OHCA)" and the "Whisper OHCA" features can be used. Depending on the type of telephones used, you can talk to the other party through the speaker and the microphone (OHCA) or you only send a call annoucement through the handset (Whisper OHCA), if they are having another conversation using the handset. Refer to Call waiting tones and features

You can join a conversation between two or more parties when you call a busy extension or attempt to pick up a line in use:

While hearing a busy tone, Press

This feature is known as Executive Busy Override.

You can activate the called extension's message waiting lamp to light red, which serves as an indicator for that person to call you back:

While hearing a busy tone, Press or MESSAGE

When that person is done with their conversation, he/she can call you back by pressing the MESSAGE button and then lifting the handset..

You can set the called telephone to ring you back when it becomes idle:

While hearing a busy tone, Press

This feature is known as Automatic Callback Busy. Your telephone will ring when the extension you tried to dial becomes idle. When you answer it, your phone will automatically dial the extension you tried to reach before.