Hi,
We are expiriencing a problem at customers site, where 9641G IP Phones h.323 (sw 6.5, CM 6.2) have poor incoming audio (stutter), with or withou PC connected through the phone PC port. Voice and data traffic are separated in different VLANs, switch ports were configured according to Avaya Documentation recomendations (native data VLAN, tagged voice VLAN). When data VLAN is removed, no problems with audio quality. Furthermore, we have captured port traffic using Wireshark, and noticed huge amount of broadcast traffic coming from data VLAN (approx. 2700 messages per second). Since audio is poor in incoming direction, and broadcast is also coming from data VLAN, we suspect that high broadcast level is causing the problem, but Avaya documentation is not particulary clear about incoming broadcast, it covers high intensity broadcast from PC attached to the phone, and recomends 500 messages per second max.
I would like to know does that limit applyes to incoming broadcast?
Furthermore, 9641G phones used to work in SIP enviroment, but without noticable impact on audio quality, as we were told by customer. In SIP enviroment 9641G phones screen freezes when using transfer, intermitantly, and that was the reason why we switched to h.323.
What is puzzling us, is that other types of phones, 1600 series or 9611G phones are not expiriencing problem with poor audio quality, although they all are functioning in the same LAN.
We are expiriencing a problem at customers site, where 9641G IP Phones h.323 (sw 6.5, CM 6.2) have poor incoming audio (stutter), with or withou PC connected through the phone PC port. Voice and data traffic are separated in different VLANs, switch ports were configured according to Avaya Documentation recomendations (native data VLAN, tagged voice VLAN). When data VLAN is removed, no problems with audio quality. Furthermore, we have captured port traffic using Wireshark, and noticed huge amount of broadcast traffic coming from data VLAN (approx. 2700 messages per second). Since audio is poor in incoming direction, and broadcast is also coming from data VLAN, we suspect that high broadcast level is causing the problem, but Avaya documentation is not particulary clear about incoming broadcast, it covers high intensity broadcast from PC attached to the phone, and recomends 500 messages per second max.
I would like to know does that limit applyes to incoming broadcast?
Furthermore, 9641G phones used to work in SIP enviroment, but without noticable impact on audio quality, as we were told by customer. In SIP enviroment 9641G phones screen freezes when using transfer, intermitantly, and that was the reason why we switched to h.323.
What is puzzling us, is that other types of phones, 1600 series or 9611G phones are not expiriencing problem with poor audio quality, although they all are functioning in the same LAN.
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