Hello
I am running a stock Freepbx 2.11 64-bit Asterisk 11 set up and have absolutely no call quality issues with our suite of Polycom IP501 handsets
I am however pulling my hair out with my Sangoma Vega 50 and 5000 50port analog gateways.
I moved 4 users to the 50-port a few weeks ago and they keep complaining of poor quality, I even witnessed one and it sounded like being on a mobile phone with 1 bar signal.
I investigated the Vega and looked at the QoS reports. I was stunned to find that particular call which only lasted 22 seconds had an 84% packet loss (network side)
Out of 50 calls to these users the majority have 0% loss with a few having less than 1% but there is the odd one here and there that’s above 50% loss
The network is not congested and I basically have the Asterisk PBX on Port 1 on and 8-port switch and Vega in Port 2 of same switch. That’s it. There’s also a fibre off to the Polycom’s but packet loss is still occurring with the fibre briefly disconnected.
I replaced the switch this afternoon and still the same
I see nothing wrong in Asterisk but get this against most calls from the Vega
Peer Call ID Duration Recv: Pack Lost ( %) Jitter Send: Pack Lost ( %) Jitter
10.10.0.12 0078-04DD-B 00:01:30 0000003013 0000000000 ( 0.00%) 0.0000 0000004509 0000000005 ( 0.11%) 0.0004
So Asterisk is seeing loss on the send packet and looking at the Qos reports on the Vega the errors are on the receive.
Can someone explain what might be going on here?
This is a sample QoS Report
Network side
Codec name G711Alaw
Packet size 30 [ms]
Silence suppression OFF
Threshold 65466 [dBm]
Voice playout nominal delay 60 [ms]
Voice playout max delay 120 [ms]
Echo canceller tail 32 [ms]
Rx
–
No. rx voice packets 185 [pkts]
Dropped/Lost packet rate 81.47 %
Bad Packets/Jitter Corrections (Voice Quality) 0.00 %
Lost due to Network (Network Quality) 81.46 %
Average jitter 7 [ms]
Tx
–
No. tx voice packets 735 [pkts]
Dropped packet rate 0.00 %
I’ve just noticed that the packet size is 30ms, should it not be 20ms?
Thanks