6-12 Netopia ISDN Modem User’s Guide
Receiving analog calls
The Netopia ISDN Modem can receive incoming analog calls, such as calls from an ordinary fax machine or pay phone. The ISDN modem will direct the call to devices connected to the two analog ports.
You can receive an analog call under the following scenarios:
■If you are using one B channel for a digital data call (such as a connection to your Internet Service Provider), you can receive an analog telephone call on the other B channel.
■If you are using one B channel for a digital data call, and someone calls the number associated with the B channel you are using, the incoming analog call will receive a busy signal unless your local switch is an AT&T 5ESS switch. An AT&T 5ESS switch will let the incoming analog call roll over to the available B channel.
You cannot receive an analog call:
■When you are using both of the B channels for two analog calls, an analog call and a digital data call, or for a Multilink PPP digital data call.
Note: An option called Flexible Call Offering (FCO) or Additional Call offering (ACO), which is included in the ISDN service from some telephone companies, allows you to receive an incoming call while a
