callcenter agents tutorials

"Agents can login to call center with *22 from the phone (hardphone or softphone) or via the FusionPBX web interface", can anyone please explain this line like what is fusiuonpbx web interface, i know agent login from softphone or hardphone in call center but how in fusionpbx web interface? like...

Hello everybody I'm deploying the fusionpbx for a callcenter the needs are: creating extensions creating queues creating agents, giving the possibiliies to the agent to login,oause:unpause, forward cals to anothetr agent (from the web interface) creating supervisor (to monitor incoming calls in...