How to get your 8821/792x wireless phones performing reliably

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/support/docs/collaboration-endpoints/wireless-ip-phone-8821/214215-how-to-get-your-8821-792x-wireless-phone.html

Published

2021-04-22

Updated

unknown

Accessed

2026-09-25

HTTP status

200

License

Cisco documentation; all rights reserved; no-redistribution; short excerpts and locators only

Source notes citing this source

• Cisco TechNote 214215 recommends 12 Mbps as the lowest rate, and 6 Mbps as lowest mandatory with 12 and 24 Mbps enabled where coverage is marginal. in context
• Cisco TechNote 214215 recommends WPA2/AES Enterprise with 802.11r FT over the air for the 8821, and WPA2/AES Enterprise with CCKM for the 792x. in context
• Cisco TechNote 214215 recommends using at least 8 channels in 5 GHz where available and avoiding DFS channels that see frequent radar detection. in context
• Cisco TechNote 214215 recommends 5 GHz AP transmit power of at least 11 dBm, typically 14 to 17 dBm outside dense deployments. in context
• As of its April 2021 update, Cisco TechNote 214215 states that the 8821 and 792x do not support 802.11k and 802.11v and that those features should be disabled. in context
• Cisco TechNote 214215 says a moving phone must hear each roamed-to AP at least 5 seconds before it needs to roam to it. in context
• Cisco TechNote 214215 says every spot in the coverage area should be served by at least two viable 5 GHz access points at -67 dBm or stronger. in context

Cite this source record

APA

WarmTransfer. (2021, April 22). How to get your 8821/792x wireless phones performing reliably. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-technote-214215-8821-792x-reliable

BibTeX

@misc{warmtransfer-cisco-technote-214215-8821-792x-reliable,
  title  = {How to get your 8821/792x wireless phones performing reliably},
  author = {{WarmTransfer}},
  year   = {2021},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-technote-214215-8821-792x-reliable},
  note   = {Cisco Systems, accessed 2026-09-25}
}