[Freeswitch-users] Fax Issues with Cisco SPA112 and T.38

Fri May 11 12:02:49 MSD 2012

Infos about MOS: http://en.wikipedia.org/wiki/Mean_opinion_score

In short: MOS is seperated in classes which describe the user's view of the quality of the network or heard voice. It is calculated from RTCP-protocol

VG,
Benjamin T.

I'm not really sure what the MOS score is useful for, maybe someone else can chime in on that.

-BDF
On May 10, 2012 2:35 PM, "Chris Ferreira" <chris at gonumina.com<mailto:chris at gonumina.com>> wrote:
Hi Bryan,

Thanks for your response, much appreciated.

1. I have never had to do a debug other than analyze fs_cli output and iv'e never done a sip trace. I have started reading up on how to do these on the Wiki and will generate some files to take a look at.

2. I have heard this before about VPS's and even VMWare servers running on local physical hardware. I hope to be able to overcome these issues.

3. Other calls work fine throughout the switch and between carriers.

I don't know if this is a good actual measure of anything, but VoIPSpear.com says that the servers MOS Score is a 4.0 .

Other than the server running on a VPS, is my setup with the ATA registering to FreeSWITCH as an intermediary between Flowroute.com a correct practice? Or is there something else I could be doing?

I know that if I was not needing to use an Analog Fax machine for sending/receiving that I would have other options. But unfortunately the Dinosaur must have it's Dial Tone.

Thanks,

-Chris

On Thu, May 10, 2012 at 2:03 PM, Brian Foster <bdfoster at endigotech.com<mailto:bdfoster at endigotech.com>> wrote:
1. Debug tells all. We need the siptrace as well.

2. VPS's are usually bad at sending/receiving faxes even if the media is just being routed through it.

3. You could also look at session timers. Are other calls working?

The only real way to know is if we have number 1 in our possession, otherwise we just start guessing.

-BDF
On Thu, May 10, 2012 at 1:30 PM, Chris Ferreira <chris at gonumina.com<mailto:chris at gonumina.com>> wrote:
Hello All,

I have a FreeSWITCH install running on CentOS 5.6 on a Linode VPS. I am trying to get my SPA112 (Version 1.1 Firmware) to send faxes (and eventually receive) successfully. I have the ATA registered as an extension and it's primary outgoing route is through Flowroute. I have T.38 enabled on the ATA and I have diabled ECM on the analog fax machine. All of the CDR's in Flowroute show that the test faxes are all ending their calls at 39 seconds.

I can post screen shots of the ATA config or provide any other config info.

Is there something I am missing, or should this setup work?

I have poked around for a while for info, but unlike the PAP2T there is little info on these SPA112's. This is my first post asking for help as I usually try to resolve things on my own. But for this, I will defer to everyone's experience.

Thanks,

-Chris

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