Nordic Star Products MFC-3420C - Manual (Page 26)

1 - 10 INTRODUCTION
Connecting an external telephone answering
device (TAD)
Sequence
You may choose to connect an answering device. However, when
you have an external TAD on the same telephone line as the
machine, the TAD answers all calls and the machine “listens” for fax
calling (CNG) tones. If it hears them, the machine takes over the call
and receives the fax. If it doesn’t hear CNG tones, the machine lets
the TAD continue playing your outgoing message so your caller can
leave you a voice message.
The TAD must answer within four rings (the recommended setting is
two rings). The machine cannot hear CNG tones until the TAD has
answered the call, and with four rings there are only 8 to 10 seconds
of CNG tones left for the fax “handshake”. Make sure you carefully
follow the instructions in this guide for recording your outgoing
message. We do not recommend using the toll saver feature on your
external answering machine if it exceeds five rings.