Voice Over Wireless LAN (VoWLAN) Troubleshooting Guide - Troubleshooting Call Admissions Control

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/td/docs/wireless/technology/vowlan/troubleshooting/vowlan_troubleshoot/5_Troubleshooting_CAC_Rev1-2.html

Published

2015-03-17

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's 2015 VoWLAN CAC guide expects 14 simultaneous calls per 2.4 GHz channel and 20 per 5 GHz channel, assuming no competing high-priority traffic and normal background noise. in context
• Cisco's VoWLAN CAC guide states a G.711 stream uses 538 medium times (1,076 per bidirectional call) out of 31,250 medium times available per AP. in context
• Cisco describes static CAC as charging a fixed medium time per call against a percentage of the total, while load-based CAC also accounts for channel load, co-channel interference and SNR, which yields more calls. in context
• In Cisco's CAC guide, TSPEC is how a WLAN client requests admission from an AP, using ADDTS action frames at call setup or on re-association. in context
• Cisco's 14 and 20 calls-per-channel figures come from a 2015 guide tied to legacy data rates and G.711 and should not be read as current per-AP capacity for Wi-Fi 6 or later. inferred in context

Cite this source record

APA

WarmTransfer. (2015, March 17). Voice Over Wireless LAN (VoWLAN) Troubleshooting Guide - Troubleshooting Call Admissions Control. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-vowlan-tsg-cac

BibTeX

@misc{warmtransfer-cisco-vowlan-tsg-cac,
  title  = {Voice Over Wireless LAN (VoWLAN) Troubleshooting Guide - Troubleshooting Call Admissions Control},
  author = {{WarmTransfer}},
  year   = {2015},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-vowlan-tsg-cac},
  note   = {Cisco Systems, accessed 2026-09-25}
}