Connections
telephone call
Entity
telephone
Entity
computer hardware
Entity
Voice over IP
Entity
public switched telephone network
Entity
millisecond
Entity
telephone exchange
Entity
Dual-tone multi-frequency signaling
Entity
business telephone system
Entity
conference call
Entity
handset
Entity
local loop
Entity
analog telephone adapter
Entity
telephone switchboard
Entity
pulse dialing
Entity
crossbar switch
Entity
Reed relay
Entity
call waiting
Entity
Centrex
Entity
relay logic
Entity