3Com WX4400 Reference Manual page 131

3 In the Active Handsets per AP list, specify the number of voice over IP
phones that you want each MAP to handle.
4 In the Expected Handset Count list, specify the number of voice over IP
phones you expect to be in the coverage area.
5 In the Handset Oversubscription Ratio list, select the ratio for the average
transmit behavior of the voice over IP phones.
The handset oversubscription ratio is the ratio of active handsets
compared to total handsets. For example, the ratio 4:1 indicates that,
statistically, 25 percent of the voice over IP phones are active at any given
time.
6 Click Next. The Mobility Domain, Radio Profile, Wiring Closet(s) page
appears.
Defining Wireless Coverage Areas 131