[hylafax-users] PSTN Inbound Fax not being detected

[GSG <goldstargroups@xxxxxxxxx>]

I am working on a second HylaFax(IAXmodem)-Tribox setup.
(The first one has been working fine.)

The endpoint hardware is a little different in this case.

Test faxes sent from any of the internal fax machines (using ATAs) to the IAXmodem extension are
being received without any problems:
*  I temporarily connected fax machines to extensions 50610, 50640 and 50650.
*  I made each of them send a fax to extension 50660.
*  Worked perfectly every time!

But I just cannot get the fax detection to work right for an inbound PSTN call.  Instead of
sending the inbound fax to the fax extension, they are being sent to the voice extensions as if
it were a normal inbound voice call.

The PSTN is connected to the FXO port on the Grandstream HandyTone 488 ATA (HT488).
A regular phone is connected to the FXS port on the HT488.
The LAN port of the HT488 is unused.  Nothing is connected to it.
The WAN port of the HT488 is conncted to our LAN, This WAN port is configured as a DHCP client
but our IPcop firewall/router always assigns it the same IP address 192.168.6.118 because it is a
fixed-lease.

On the same LAN is our TrixBox with the 192.168.6.114 (fixed-lease) ip address.
Right next to is our IAXmodem-HylaFax system with the 192.168.6.116 (fixed-lease) ip address,
extension 50660.

Along the same lines:
192.168.6.42 is an IAX2 ATA, extension 50488
192.168.6.43 is a SIP ATA, extension 50610
192.168.6.44 is an IAX2 softphone, extension 50620
192.168.6.45 is a SIP softphone, extension 50630
192.168.6.46 is an IAX2 ATA, extension 50640
192.168.6.47 is an IAX2 ATA, extension 50650


On the Trixbox side, ALL of the above have
___disallow=all
___allow=ulaw
in their respective Device Options.


It looks like this:

PSTN---RJ11...FXO port...{HT488}...WAN port...RJ45---LAN---TrixBox, IAXmodem-HylaFax, ATAs,
softphones, ...
and
Phone---RJ11...FXS port...{HT488}


On the HT488 side, here are some of the relevant settings:
under BASIC SETTINGS-
___Number of Rings: 1 (number of phone rings before a PSTN incoming call is forwarded, default 4)
___Forward to VoIP: 50488 (PSTN calls will be forwarded to the specified VoIP number)
under FXS PORT-
___Preferred Vocoder: (in listed order)   choice 1 "PCMU"
___Fax Mode:     T.38     Pass-Through(selected)
under FXO PORT-
___Preferred Vocoder: (in listed order)   choice 1 "PCMU"
___Fax Mode:     T.38     Pass-Through(selected)


Accordingly, the Trixbox side
under freePBX - Setup - General Settings - Fax Machine -
___Extension of fax machine for receiving faxes: IAXmodem-HylaFax <50660>
under freePBX - Setup - Inbound Routes - Fax handling -
___Fax Extension: freePBX default
___Fax Email:
___Fax Detection Type: NVFax
___Pause after answer: 10
under freePBX - Setup - Follow Me -  extension 50488 -
___ring strategy: ringall
___Alert Info:
___extension list: 50610 50620 50630 50640
___CID name prefix: 
___ring time (max 60 sec): 40
___announcement: None


Note:
* There is just one Inbound Route on this TrixBox system. The PSTN on HT488's FXO port.
* As per the settings above, inbound PSTN calls go to extension 50488.
* I have tested with "NVFax" and "Zaptel", no luck.
* I have tested with a 10 and a 5 second pause, no luck.
* I have tested with extension 50488's Follow Me settings in place , no luck.
* I have tested with extension 50488 and (deleted) no Follow Me settings, no luck.


When there is an inbound PSTN call:
a.  You can hear 1 ring on the HT488 FXS phone.
b.  Then the call is sent to TrixBox.
c.  There is a short silence where Fax Detection should happen.
d.  With the 50488 Follow Me settings in place, the applicable extensions ring and you can answer
the call.  If it is a fax you hear the fax tones.
e.  With no 50488 Follow Me settings, the HT488 FXS phone rings.  If it is a fax you hear the fax
tones.


What's missing?
Why is the PSTN Inbound Fax just not being detected?































































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