Greetings, i have noticed recently that when our 2Mbit/s E1 link is fully utilised Jitter and Average Jitter increase to ~30 - 60 as viewed from a 7941G handset, when the link is idle both these values hover between 0 - 5.
Now we arnt having any voice quality problems and MOS scores are always above 4 but i was wandering if i could somehow reduce this and work towards an optimal configuration.
The link tends to be fully utilised when people are downloading large web files like service packs.
The current config as below has been built to sustain 10 concurrent G711 calls and shape web traffic to 1Mbit/s.
class-map match-any voiceControl
match protocol sip
class-map match-any voiceMedia
match protocol rtp audio
match access-group name voiceRtp
class-map match-any webTraffic
match protocol http
match protocol smtp
class-map match-any voiceRemark
match ip dscp ef
match ip dscp cs3
match ip dscp af31
shape average 1000000
set dscp ef
bandwidth percent 5
set dscp af31
set dscp default
ip address **************
service-policy output webControl
ip unnumbered FastEthernet0/0
service-policy output voiceQos
ip access-list extended voiceRtp
permit udp any any range 16384 32767
Any advice would be much appreciated.