ZyXEL Communications P-128IMH, User Manual, Page: 123 / 191

Prestige 128IMH ISDN Modem/ Router/Hub
Advanced Phone Services 9-1
Chapter 9
Advanced Phone Services
The Prestige 128IMH supports a comprehensive set of advanced calling features known as
Supplemental Services. These features include:
•
Call Waiting
•
Three Way Calling (conference)
•
Call Transfer
•
Call Forwarding
9.1 Getting Started
9.1.1 Things you need to know before you start using Supplemental
Services.
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Additional Call Offering (ACO) is required on your ISDN line in order to use the Call
Waiting feature. Flexible Calling is required on your ISDN line in order to use the Three-
Way-Calling or Call Transfer features. You need to check with your telephone company to
confirm if these services are available to you and if so, are there any additional charges for
them.
♦
In some cases, your telephone company may only enable these features on your first directory
(phone) number. In this case, you may want to request that the features be enabled on your
second directory number as well.