Patton M-ATA never completes transmission 2

[sunshine999]

technician has worked with Patton. Patton says all is good. He also has Avaya documents. fax to fax will not complete .
***you can hear the modem tones then it gets garbled and never completes. I have listed everything he has tried below.
IP Office is Rls 10. with PRI trunks
Delete/Rebuild both IPO User& Base extension along with factory default of M-ATA
Upgrade M-ATA to latest firmware
Forced ATA & IPO to not use T.38, only G.711U
Forced T.38 settings in IPO down to 9600 baud rate
Disable/Enable Re invite
Tried Lockdown Codec
Set fax machine baud rate to 9600
Disable ECM on both fax machine and IPO
Modified codec selections in both IPO & ATA
Tried 3 different model fax machines- Faxes worked on old system via analog station ports
Can make current faxes work on IPO analog station port, but 2 locations won’t have this option so must use ATA
PRI trunking at this location
Voice calls work fine on ATA both in house and via trunks
Does anyone see what we are missing? Any help will be much appreciated.

thanks in advance

 

[rdoubrava]

This Patton M-ATA is at the same location with the phone system ?

 

[sunshine999]

99.99% sure it is. but checking.

 

[sunshine999]

Different building than the IPO- However all connected via local WAN over fiber

 

[rdoubrava]

in the Patton
Telephony - codecs
set Packetization to 20 ms
Jitter buffer to fixed.
try 80 ms

 

[rdoubrava]

all connected via local WAN over fiber

if one network is gigabit, the link is 100 meg, then back to gigabit.
You'll need QoS

 

[sunshine999]

thanks so much

 

[sunshine999]

Do you have a suggestion on Codecs?
Patton suggested only using G711 u and a law.
Also, do you suggest using T.38 or G711? Also should I re set the codec lockdown or reinvite options?

 

[rdoubrava]

G 711 only
I never use T.38

 

[sunshine999]

thanks again the tech will try this

 

[sunshine999]

10 gig backbones between building with the exception of 1 and it’s 1 gig. All desktop connections are 1 gig

 

[sunshine999]

still not able to complete transmission

 

[mforrence]

I HIGHLY suspect that one of the ends IS trying to use T.38. If you watch the SIP transactions, you'll almost certainly see a re-invite that is not being handled properly.

Mike Forrence

http://www.goteamvox.com

 

[sunshine999]

thanks checking

 

[sunshine999]

T.38 is not being used
any other ideas?

 

[mforrence]

Capture a transaction via Monitor - it will tell the tale. The magic in SIP is that it's fairly easy to follow. Easiest when there are few other calls.

Mike Forrence

http://www.goteamvox.com

 

[sizbut]

Use T.38 both ends, it's the protocol specifically intended to handle the issues caused by trying to send fax over IP connections (to those who've got their fax solutions working on G711, bravo you, your network is probably very different from the OP's).



Stuck in a never ending cycle of file copying.

 

[rdoubrava]

simplify and isolate the problem

Put the patton device on the same switch that the phone system is on
(eliminates the network)
Test using a Fax machine using a POTS line.
(eliminates IP to IP faxing)

Use wireshark to take a look at the network.

 

[sunshine999]

mforrence

Monitor traces
testing from 1210

https://www.dropbox.com/sh/ughze80esqkylo3/AACZW9xZzVM19qR1SgSKhy6wa?dl=0