Vocera's Infrastructure Planning
The Vocera Infrastructure Planning Guide, describes the site survey minimum requirements that show that
the badge should have a minimum receive signal strength of -65 dBm, a signal-to-noise ratio greater than
25 dB, and proper access point overlap and channel separation. Although the badges use a similar omni
directional antenna as a notebook that is used for a site survey, it does not mimic the behavior of the badge
very well, given the wearers' effects on signal strength. Given this unique requirement and this behavior of
the transmitting device, the use of the Cisco Architecture and Radio Resource Management is ideal in order
to make sure that there is lack of unusual radio frequency (RF) site characteristics.
The Vocera badge is a low powered device, worn next to the body. The Vocera requirements in this document
can be easily achieved. If the wireless network is designed properly, the badge should be able to work even
in environments where many SSIDs are present. However, and just like any other 802.11 device running a
voice time-sensitive application, problems like choppy audio may appear in case of poor network design
and high RF resource utilization (wireless congestion).
Vocera IP Phone Deployment in Cisco Unified Wireless Network Infrastructure, Release 7.4
1
Vocera's Infrastructure Planning
Vocera IP Phone Deployment in Cisco Unified Wireless Network Infrastructure, Release 7.4
2