I have a setup :
CCM 4.1(3)with SR3B
Cisco 2811 Router with PVDM2-64 configured with DSP Resources
8 * CP7936 Phones
All phones are spread over the WAN network, link speeds range from 256K - 2 MB
Most links are 50% to 75% congested.
My problem is that when I speak individually to each locations, the voice is clear & with no breakage, but when I join them say 4-5 conferees, then the voice quality degrades & breakage is there.
Now I want to know what could be the reason for this degradation (I dont have QOS configured on my WAN at all)
I want to make sure I am not hitting on any bugs or any misconfiguration issues.
I have applied CCM SR3b because it addresses 2 sec jitter problem with 7936 phones.
Besides that any recommendations would be useful.
Second thing I wanted to know is that I make a single call to one of my locations which is connected with a 2MB Link. The out is 550K & in is 150K traffic. The problem is I am able to hear the other side properly (from where 150K traffic is coming) but other side cant hear me properly (where 550K traffic is going).
I know that 2MB link doesnt require LFI to be configured, but I wonder because there is no QOS configured, would serialization or queueing delay be causing a problem??
Hoping to hear some answers...