The following best practices are required for successful wireless Lync solution. Please refer to the AOS user guide and campus design guide for details on making these settings.
RF Recommendations
1. 100% coverage in all areas of Lync use
2. Minimum RF signal (RSSI) levels of -65dBm
3. Minimum Signal-to-noise ratio (SNR) of 25dB
4. Co-Channel separation of 20 dB
5. Min and Max AP power difference no greater than 2 steps
Controller Settings
Broadcast Filter ARP – enabled on the virtual AP profile
Enable fair-‐access shaping policy in the traffic management profile
On the SSID profile
- WMM Traffic Management to prioritize Voice/Video
- Set max-‐tx-‐fail to 20
- Set max-‐retries to 4
In the ARM profile
- Enable Voice/Video/load aware scan
- Client match - enabled
Enable call admission control
User opportunistic Key Caching (OKC) in case of 802.1x authentication in the dot1x profileNetwork Performance
- Round trip delay of less than 100ms between clients
- jitter of less than 10ms
- packet loss <5%
- QOS trust on all voice ports
- End-to-end QOS