Fax CNG Detection (#505, Group 8)—Release 3.0 or
Later
5-135
5
Feat ure Ref erence
Fax CNG Detection
(#505, Group 8)—Release 3.0 or Later
Description
To use Fax CNG Detection, you must have a voice messaging system or
ASA/DXD. You must also have your system configured in one of these
ways:
■ Partner ACS as a stand-alone module
■ 308EC version 2 module in slot 1; any modules in remaining slots
■ 200/206/400 module in slot 1, 308EC version 2 module in any other
slot
Fax CNG Detection will not work if you have a 308EC version 1 module in
slot 1.
This feature allows voice calls and fax calls to be received on the same line, which
eliminates the need for a dedicated fax line.
When the start button on a fax machine is pressed, the fax machine sets up to
send a fax. The sending fax machine sends a special tone called a calling tone or
CNG tone. This tone is sent while the call is being dialed, connected through the
network, ringing, until the call is answered. If another fax machine answers, the
appropriate signals are sent back to the calling fax machine to send the fax
transmission.
When an incoming call is answered by PVM, PMVS, PARTNER MAIL or
ASA/DXD, PARTNER ACS determines if the incoming call is a fax. If the system is
set up to automatically route incoming fax calls to fax machine(s), ACS will
automatically transfer the call to a fax hunt group (Hunt Group 8).
Related Features
You may want to use Automatic Extension Privacy (#304) to prevent other
extensions with the same line from joining a fax call at the extension and
interrupting it.
Considerations
When lines appear on a fax extension, you will want to make sure that the fax
machine does not automatically answer outside calls on these lines. There are
three ways you can do this:
■ Set the fax machine for delayed pickup.
■ Use Line Ringing to change the ring options on the fax extension to either
delayed ring or no ring.
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