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Configuring Dial Plan Settings
41-001190-02 Rev. 01, Rel. 1.2 4-45
Configuring AastraLink Pro 160 System and Network Parameters
Configuring a Dial Plan for Auto-Fax
Overview
The AastraLink Pro 160 allows you to connect FAX machine(s) to the FXS ports
on the rear panel to send and receive fascimile communications.
A FAX machine connected to either FXS port can send outgoing faxes using the
standard AastraLink Pro dialplan (i.e. 9 for outbound FXO line).
For incoming FAX calls, the Auto-FAX feature of the auto-attendant will monitor
the line for incoming FAX calls and automatically re-route call to the waiting fax
machine connected to an FXS port.
FAX Indication Tones
When two Facsimile machines first connect, they exchange tones to provide an
indication that this is a FAX call rather than a voice call. The calling party sends a
CNG (half-second 1100Hz tone repeated every three seconds), followed by V.21
(a rapidly alternating sequence of short tones using frequency-shift-keying).
The Auto-FAX feature uses a Digital Signal Processor on AastraLink Pro model
160 hardware to listen for V.21 negotiation and CNG FAX calling tones. If either
of these FAX tones is detected while the auto-attendant main menu is answering
the call, the Auto-FAX feature dials the number 6012 into the IVR’s digit collector
to re-route the FAX call.
FAX Call Re-routing
The “6012” is a dedicated virtual extension on the AastraLink dial plan, which
terminates the FAX calls to the FXS A port (if idle) or to a Busy tone if the FXS is
in use (to trigger the calling FAX machine to retry at a later time).
Note: Auto-FAX does not support FXS B at this time.
This type of provisioning allows you to leave a FAX machine connected to the
FXS A port, to receive all incoming FAX calls received from FXO lines by the
Auto-Attendant (either during Day or Night service, depending on provisioning).
Auto-FAX functionalty is always enabled on the AastraLink Pro for all incoming
FAX calls received from FXO by the Auto-Attendant main menu.