Brother FAX 870MC - Manual (Page 28)

18
C H A P T E R T W O
As with all fax units, this machine must be connected to a two wire system. If
your line has more than two wires, proper connection of the FAX/MFC cannot
be made.
If you are installing the FAX/MFC to work with a PBX:
1 It is not guaranteed that the unit will operate correctly under all circum-
stances with a PBX. Any cases of difficulty should be reported first to
the company that handles your PBX.
2 If all incoming calls will be answered by a switchboard operator, it is
recommended that the Answer Mode be set to MANUAL. All incoming
calls should initially be regarded as telephone calls.
3 The unit may be used with either pulse or tone dialing telephone service.
Custom Features on Your Phone Line
To learn how custom features may affect your faxing operations, please
refer to the Troubleshooting chapter, p. 120.
Connecting an External
Telephone Answering Device (TAD)
Sequence
You might choose to connect an additional answering system. When you
have an external TAD on the same telephone line as the FAX/MFC, the
TAD answers all calls. The FAX/MFC “listens” for fax calling (CNG)
tones. If it hears them, the FAX/MFC takes over the call and receives the
fax. If it doesn’t hear CNG tones, the FAX/MFC 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 FAX/MFC cannot hear CNG tones until the TAD has answered
the call, and with four rings there are only 8–10 seconds of CNG tones left
for the fax “handshake.” Make sure you carefully follow instructions in
this manual for recording your outgoing message. We do not recommend
using the toll saver feature on your external answering machine if it exceeds
4 rings.