Ecm (Error Correction Mode); Multi-Line Connections (Pabx) - Brother MFC-640CW User Manual

ECM (Error Correction Mode)

The Error Correction Mode (ECM) is a way for the machine to check
a fax transmission while it is in progress. If the machine detects
errors during fax transmission, it resends the pages of the fax that
had an error. ECM transmissions are only possible between fax
machines that both have this feature. If they do, you may send and
receive fax messages that are continuously being checked by the
machine.Your machine must have enough memory for this feature to
work.

Multi-Line connections (PABX)

Most offices use a central telephone system.
Brother recommends that all our Fax/MFC machines be connected
to a discreet (dedicated) line. Although a particular PABX may
appear to work with a particular model of fax machine, we cannot
guarantee that the unit will operate correctly.
While it is often relatively simple to connect a fax machine to a PABX,
(Private Automatic Branch Exchange), we suggest that you contact
the company that installed your telephone system and ask them to
connect the fax machine for you.
Brother does not recommend the use of a PABX line. PABX
limitations in general can cause some functions of the fax machine
not to work correctly.
1 - 19 INTRODUCTION