There are six major steps for WAN deployment when preparing IP telephony. From the list below, please select which of the following are valid pre deployment choices. (Choose all that apply.)

A.
Choosing Wiring Closets carefully

B.
Determining VoiceBandwidhtRequirements

C.
Assessing Results

D.
Selecting the right handset for the IPSoftPhone

E.
Analyzing Upgrade Requirements

F.
Collecting Information on the Current WAN Environment