Switchboard functionality can be used for handling a large number of calls to be transferred to company users. A normal service pool can be used to receive and allocate the calls to the switchboard agent(s).
Switchboard features
Service pool status monitoring
Call parking
Call history and optional call recording
Blind transfer
Transfer using consultation (warm transfer)
Returning call identification and handling
Company directory with users' availability info and ability to modify the availability
Office 365 calendar integration
Phonetic search
SMS sending to directory users
More info in BenVoice for Windows user guide.