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The Netopia ISDN Modem can receive incoming analog calls, such 
as calls from an ordinar y fax machine or pay phone. The ISDN 
modem will direct the call to devices connected to the two analog 
por ts. 

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 Ser vice 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 ser vice from 
some telephone companies, allows you to receive an incoming 
call while a dual-channel Multilink PPP call is in progress.