QUESTION What's the best way to debug this?

[Richard Guy]

Hi, I have PBIAF running on Raspberry Pi with a Sangoma Vega 50 and a Geils trunk. Incoming calls come in over the Vega and outgoing over Geils, unless we have more than two outgoing at a time in which case they go over the Vega - we have four AT&T POTS lines total.

Everything has been working GREAT for a couple of months.

For the last couple of weeks though my employees have had complaints from the people on the other end of the phone about poor call quality.

- It happens regardless of who places the call i.e. incoming and outgoing are affected.
- Regardless of what phone is used.
- Regardless of whether or not other calls are in progress at the time.
- It's an intermittent problem. :-(

What's the best way to debug this?

I think it might be a network issue but I am not sure. Only changes have been (i) a large backup job on my NAS (limited using trickle to 50 kbit upload - not much) has been running continuously and (ii) a new router (which otherwise seems to be fine).

Thanks

Richard

 

[rossiv]

Since it's both inbound and outbound, and you have different types of trunks for both, I'm tempted to say it's something internal to your network. What kind of switch are you using?

 

[Richard Guy]

Since it's both inbound and outbound, and you have different types of trunks for both, I'm tempted to say it's something internal to your network. What kind of switch are you using?

thanks for the reply. We have a few switches, a gigabit Netgear, a few gigabit D-link (the eco-friendly ones), and a Dell Powerconnect.

We have Cisco phones and they have built-in switches, only 100 Mbit though. I think we use a few of them.

Hope this helps!

thanks.

 

[Richard Guy]

...ok I removed my NAS and things have improved significantly...also I found this discussion which is potentially useful.

http://pbxinaflash.com/community/index.php?threads/troubleshooting-voip-call-quality-issues.1185/