Select all that apply.

• A

  It requires only a small data switch and router, IP phones, and agent desktops at remote sites for a few agents.

• B

  It requires only limited system and network management skills at remote sites.

• C

  Small remote branches require PSTN and SIP trunks, in addition to the ones needed for local POTS lines for emergency services (911) in the event of a WAN link loss.

• D

  PSTN trunks for incoming traffic connect to data centers for efficiency.

• E

  It does not use VoIP WAN bandwidth when an agent is answering the call.

• F

  Calls extend over the WAN only while calls are in queue.