TelNet Worldwide Glossary


A device that converts IP to analog signaling, allowing devices like fax machines, fire panels and alarm lines to send calls over your internet bandwidth.

A call feature that routes callers to an option menu so they can select a specific department or extension.

A business continuity feature that redirects calls automatically to another phone number upon failure to connect the call to the original number.

A telecom feature that shows the call receiver the telephone number of the incoming call.

For more info: The 411 on E911

A feature that shows a caller’s address. This is commonly used with the E911 function.

For more info: The 411 on E911

A computer interface that allows software to interact with each other through programming code.

BYOB allows you to keep your internet service provider in combination with a service that utilizes the internet.
A department that takes all incoming/outgoing calls from new and existing customers on behalf of an organization or client. For more info: The Difference Between a Call Center and a Contact Center

A telecom feature that enables you to direct calls to forward to another phone number.

Prioritizing certain traffic profiles, such as voice or video, over others in order to maximize quality.

The Cloud is a digital network of servers, usually hosted in a data center.

Short for cloud computing, the cloud is where you can store and access data over the internet rather than your computer’s hard drive.

An IP-based phone system that routes all calls digitally through the cloud. You can control your PBX through a web-based portal.

For more info: What is Cloud PBX?

The caller ID name that’s shown with an incoming call.

Short for coaxial cable, coax is a type of electrical cable made up of aluminum and copper shields with an outer plastic layer. Coax cable is frequently used to transmit internet.

Codecs encode and decode certain data or signals — an example being analog voice signal into a digitally encoded signal. Codecs determine voice compression and vary in the sound quality, the application (voice or fax), and the bandwidth required.

A third-party Business Process Outsourcing that handles inbound and outbound calls as well as other communication channels such as SMS, email and chat.

For more info: What is a Contact Center?


Specially-designed housing structures that host servers and data securely.

For more info: What is a Data Center?

A telephone service that connects you straight to a telephone number through a PBX.

A telephone service that allows users to dial out numbers from their PBX.


A service that provides emergency response to identify a caller’s location and call-back number.

For more info: The 411 on E911

Your ten-digit phone number that contains an Automatic Location Identifier for emergency response.

An approximate geographic coordinate where emergency services may send dispatch to.

An E911 service that connects companies and organizations to Public Safety Answering Points for emergency response.


The international standard for real-time voice, video and data communication over packets.

A hunt group creates a primary number which then can forward a call to different numbers if it’s busy.

HIPAA stands for Health Insurance Portability and Accountability Act. The name originates from an act passed in 1996 requiring confidentiality of medical information. Whenever something is HIPAA-compliant, it is in regulation with the Act, guaranteeing the protection of sensitive medical information.


All devices connected to the internet.

IP-PBX stands for Internet Protocol Private Branch Exchange. An IP-PBX is a telephone switching system that connects from phone extensions to the public switched telephone network.

Short for Internet Protocol Primary Rate Interface, an IP-PRI is an IP-based voice solution that provides a PRI handoff to a legacy PBX.

For more info: What is IP-PRI?

An organization that provides network services for residents and businesses.

A phone menu system that incoming callers navigate through in order to reach a specific department.


The dropping of packets within a voice call. You can hear jitter whenever someone on the other end of the phone sounds like their voice is breaking up through a call.


Requires that MLTS locations in the U.S. let users dial 911 directly, without being hindered by any additional digit, code or prefix, such as “9,” to reach an external line.

For more info: Kari’s Law: Everything You Need to Know


A network connected by local devices such as computers, within a location such as a residence or school.

The delay between a web request from sender to receiver.


A privately operated network that utilizes technical means to carefully control connection paths between locations.

A web-based platform for service management, which can be accessed via desktop, laptop or mobile device.


A redundant system to safe proof operations by having a power backup in place.

An interface that connects at least two networks to specify signaling and management functions.

A central point of operations where an organization supports its computer network and telecommunications infrastructure.


Short for Payment Card Industry Data Security Standard, PCI DSS is a security standard for credit cards to help protect against fraud and unauthorized transactions.

A PBX is an on-premise business telephone system that routes all calls.

For more info: What is Cloud PBX?

POTS is an analog voice system that is connected via copper wire. POTS are also known as landlines.

A feature where ethernet cables can carry electrical power. The advantage of a PoE is that power can be delivered without having to deal with AC power.

PRI is a traditional phone line able to handle 23 channels.

A call center that handles calls for emergency response such as police, firefighters and ambulance services.

Short for Private Switch-Automatic Location Information, a PS/ALI is a service that lets users update their location information for 911 emergency services.

A network of phone routing areas that is the hardwire network for landline phones. Think of it as the internet for telephones.


In reference of telephony: overall performance of a service to maximize bandwidth and prioritize traffic.


An act that requires a “dispatchable location” must be conveyed to the PSAP in the case of a 911 call.

For more info: Ray Baum’s Act: What It Means for Your Organization


SD-WAN stands for Software-Defined Wide Area Network. SD-WAN is a way to manage WAN (long-distance networks) through software.

For more info: What is SD-WAN?

A promised level of service between a service provider and a customer.

A telephone feature that lets you forward to a group of phone numbers. When that call forwards, all numbers ring at once.

An internet protocol for starting and terminating media sessions such as video and voice.

An assigned phone number “line” delivered over the internet.

An internet signaling protocol that carries voice and data. Most often associated as a VoIP service to deliver phone lines over the internet.

For more info: What is SIP Trunking?

A software-based telephone that has no hardware aside from a headset, which connects to the computer directly.


A 1.5mps copper circuit that carries voice and/or data. You can bond multiple T1s together for higher speeds.

Short for Transmission Control Protocol/Internet Protocol, TCP/IP are protocols that allow network devices to communicate with each other.


A unified communications application that allows you to call, host HD video meetings and message coworkers.

A collaboration application that connects via laptop and mobile devices, that features calling, messaging and video conferencing.

For more info: What is Unified Communications?


Data devices that transmit real time audio communication over the internet.

For more info: What is VoIP?

A secure, encrypted connection that keeps online surfing private from the internet.

An encrypted connection between a computer or a mobile device with another network.

TelNet Worldwide
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