ZyXEL 202H 91-003-194003B User Manual

P-202H Plus v2 User’s Guide

Chapter 13 Supplementary Phone Services

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• You are dialing a number on the B-channel the incoming caller is attempting to reach, but 

have not yet established a connection.

Three Way Calling allows you to add a third party to an existing call. This service must be 
subscribed from your telephone company.

If you wish to call someone and conference him/her in with an existing call:

• Press the flash key to put the existing call on hold and receive a dial tone.
• Dial the third party's telephone number.
• When you are ready to conference the calls together, press the flash key again to establish 

a three-way conference call.

Note: If you wish to cancel your attempt to establish the conference call because the 

third party's line is busy or if they do not answer, simply hang-up the telephone 
and pick it back up after it starts ringing to return to the first caller.

Simply press the flash key. The last call that was added to the conference is dropped.

If you hang up your telephone during a three-way call and the two other callers remain on the 
line, the ISDN network will do an implicit transfer to directly connect the two remaining 
callers together.

Call Transfer allows you to transfer an active call to a third party. This service must be 
subscribed from your telephone company.

Transferring an active call to a third party:

1 Once you have an active call (Caller A), press the flash key to put Caller A on hold and 

receive a dial tone.

2 Dial the third party's telephone number (Caller B).