Glossary of Acronyms Terms and Hosted PBX VoIP Definitions

PBX is an abbreviation for Private Branch Exchange, a private telephone network used within an enterprise. Did you know what PBX actually stood for? At Call 48 we know that VoIP technology is always upgrading and evolving to meet the needs of customers and because of this, new usages, terms and definitions are always emerging. Here Call 48 helps you navigate all the latest cloud-hosted PBX terms and definitions that virtual companies will use.

ACD (Automatic Call Distribution): A system that allows representatives to speak to callers in the order that they call. If you’ve ever called somewhere and had an automated teller announce that “your call will be answered in the order in which it was received,” you have experienced ACD.
Asterisk: Free, open-source software that runs under Linux, Mac OS X, and several variants of Unix on computers powered by x86, PowerPC, and other processor types. Provides PBX capabilities for VoIP and (with appropriate interconnection hardware) digital and analog telephone systems.
Automatic callback: This term can refer to a PBX feature that lets employees calling from outside the office avoid long-distance charges. The employee places a short call to the PBX, which calls the individual back using an inexpensive (VoIP) calling plan. Confusingly, the term also refers to a feature that sets a phone to make multiple attempts to reach an unavailable number, alerting the caller when a connection is finally made.
Dial-By-Name Directory:A database that allows callers to use their phone keypads to dial the name of the person they want to reach (e.g. 76484 for SMITH).
DISA (direct inward system access): Service provided by PBX systems that lets authorized personnel dial into the PBX from external phones, so they can, for example, place calls through the PBX.
Hosted PBX: A Hosted PBX system is one that is made available through the internet. Unlike a non-hosted PBX system, your office won’t be required to host telephone equipment because the hosting company does if for you. This will significantly lower the cost while providing the opportunity for easy expansion.
IAX (inter-Asterisk exchange): VoIP signaling protocol that provides for control and transmission of streaming media over IP networks. It enables connections between Asterisk servers as well as between servers and clients.
IP PBX (Internet Protocol private branch exchange): A system that, by using the Internet Protocol over Ethernet networks, provides the same functions as, and often extends the capabilities offered by, traditional PBX installations.
IVR: Stands for interactive voice response and is the part of an auto attendant system that provides voice prompts and information to callers and takes action based on the buttons they press on their phone keypads or their spoken answers.
Porting: The process of moving a phone number to a new telephone service. Contact V1 VoIP to find out about our porting rates.
Ring group: A set of extensions that the PBX rings in the order determined by rules the administrator sets.
SIP (session initiation protocol): A set of IP telephony signaling conventions, mostly used for VoIP, but usable for electronic delivery of any multimedia type.
Trunking: An IP PBX’s process of merging data from multiple calls into a single set of packets to reduce transmission overhead.

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