FAX Detection Flow
15
FAX Detection Flow
Configuring Machine Detection
If you are not familiar with the meaning of the fields, click Show Help, located at the upper right
corner of the Web page, to display field description when mousing over the field name.
NOTE:
This procedure is only required if your fax machine is directly connected to a specific FXS
port and if this port is not used for modem transmission.
Steps
1. Go to Media > Misc.
2. Set the CNG Tone Detection selection list to Enable.
3. Set the CED Tone Detection selection list to Enable.
4. Set the V.21 Modulation Detection selection list to Enable.
5. Set the Behavior On CED Tone Detection selection list to Fax Mode.
6. Click Apply.
Result:
IF
AND
THEN
If T.38 is enabled
• A CNG tone is detected, or
• A V.21 preamble is detected, or
• T.38 packets are received on the
IP side
Then the Mitel unit switches to T.38
• If a CED tone is detected (Answer
Tone or ANS) and no other
conditions indicates that a fax is
present, or
• If a fax is detected but T.38 is
deactivated
Then the Mitel unit switches to Clear
mode.
If a CED
a
is detected before a CNG
a. Note that the CED tone can be detected on both the IP side (egress side) or on the analog side (ingress side).
The Mitel unit will first switch to Clear
Channel and if T.38 is enabled, it will
then switch to T.38.
