A private branch exchange (PBX) is a telephone exchange for a particular business. A PBX system connects incoming telephone lines to a set of extensions inside a business.
VOIP PBX or IP is a PBX system that can handle calls on an IP network. It supports outbound connection to a SIP trunk or regular trunk; it also supports IP extensions. Most VOIP services provide regular telephone numbers to allow calls from landline or cell phones. The person who calls these numbers usually cannot tell the difference whether the call is make to a VOIP service or traditional PSTN service.
Flex PBX is an affordable and easy to use auto attendant software system. Because it is a software package, it offers flexible configuration and unlimited design capability. It has all the features of a traditional PBX plus much more.
Also known as a Virtual Receptionist, it allows callers to be automatically transferred to an extension without the intervention of a live operator. Typically the Auto Attendant is included in a business phone system.
A phone system menu that interacts with humans through the use of voice and DTMF keypad inputs. Auto attendant is a special kind IVR, where the target operation is the transfer of a call to an extension. IVR can be more broadly defined. It can interact with a database to supply requested information such as account balances, etc.
VOIP Services like
IP PBX systems like
SIP Trunks like
Analog Phones like