07-30-2007 12:08 PM - edited 07-03-2021 02:25 PM
Hi
We have 2 x 3750 with integrated controllers, 8 x 1131 AP's, and approximately 35 x 7920 phones.
We have an issue with Jitter and occasional phone freeze with no button response for approximately 1 minute.
We are using the following QoS settings:
WMM state: disabled
QoS level: platinum
DSCP: disabled
802.1p Tag: 7
We get the following readings from the phones:
=================
Average Jitter 40
Maximum Jitter 60
RSSI 50
=================
Average Jitter 35
Maximum Jitter 55
RSSI 53
=================
Average Jitter 75
Maximum Jitter 95
RSSI 44
=================
As you see Jitter is always above the 30ms recommended.
Any help would be really appreciated
Regard
David
07-30-2007 01:25 PM
Sounds like you don't have 3.01 or later deployed on the 7920s.
Suggest using 3.02. Some fixes in 3.01 due to IAPP and MBSSID w/ Airespace 4.0.
Will be some jitter when the phone is scanning off-channel, but will not be noticeable to the human ear.
Also some jitter when roaming from AP to AP depending on the authentication type.
For controller version, would recommend 4.0.217.0 or later.
07-30-2007 11:51 PM
Sorry forgot to mention....already using 3.2 and as per the subject title, using 4.1.141 on the WLC.
We are currently using WPA for encryption, and MAC filtering.
07-01-2008 11:01 AM
Mike,
I have a wireless set up for customer with
3560 (laod balanced) and WLC and AP with 7921.There are occasions where the jitter value on the phone reaches as high as 650 and 7921 (1.1.1) phones cannot hear anything.
How do we pursue this issue?We have checked LAN and no congestion issues are noticed.
Can you pls help?
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