Poor Inbound call quality - newbie

[dbergsma]

Hi Folks,

I have download 3cx free version - 6.1.0 on w2008, linksys spa942, and grandstream 4104 (v1.0.08) for FXO to PSTN.
I'll do the upgrade once I have proof of concept working.

Outbound calling works no problem.
Calls between extensions seems to work fine.

On PSTN In bound calling - my wife says I sound like Darth Vader with the sound of a light saber whirring in the background.
On the IP phone - the PSTN in bound caller sounds fine, however, the PSTN caller hears a remake of star wars.

Any ideas?


Thanks in advance
Dean.

 

[dbergsma]

correction -- grandstream firmware is
Software Version: Program-- 1.0.1.8 Loader-- 1.1.3.3 Boot-- 1.1.3.2

 

[galal202]

Hi Folks,

I have download 3cx free version - 6.1.0 on w2008, linksys spa942, and grandstream 4104 (v1.0.08) for FXO to PSTN.
I'll do the upgrade once I have proof of concept working.

Outbound calling works no problem.
Calls between extensions seems to work fine.

On PSTN In bound calling - my wife says I sound like Darth Vader with the sound of a light saber whirring in the background.
On the IP phone - the PSTN in bound caller sounds fine, however, the PSTN caller hears a remake of star wars.

Any ideas?


Thanks in advance
Dean.

Hello dbergsma and welcome
I have 4104 and it works fine with 3cx
this my settings
restore to factory set then reconfig it again

 

[mobilesoundz]

I had a similar issue with a linksys 3102 i had to increase the gain settings to +15 which made it crystal clear and even over the wirelss lan

 

[galal202]

I had a similar issue with a linksys 3102 i had to increase the gain settings to +15 which made it crystal clear and even over the wirelss lan

What about echo after +15gain?

 

[mobilesoundz]

have not experienced any echo, no delay just a really nice quality voice... Try it and see what happens

 

[wzaatar]

What codecs are you using on your IP Phone and your Grandstream PSTN gateway?

 

[dbergsma]

711u

however, turned on pbx delivers audio. all is good.

 

[wzaatar]

I can think of two reasons: Either the RTP packet size not correct, or it's a simple firewall problem...

Cheers,

W.

 

[dbergsma]

changed out grandstream with patton, no problems, I'm happy with 3cx now.
can't say I would recomend grandstream.

dean.