Main Menu
Open a Ticket
My Ticket History
Browse Knowledgebase
My Account

Register | Forgot Password?

Search by keywords:

Glossary of Terms

Article ID: 000005
Rating: 4.3 / 5.0 (9 votes)
Views: 18095


Deffinitions of the accronyms and terms commonly used with broadband services.


Local Exchange Carrier, i.e. Pac-Bell/SBC, Qwest or Verizon. The LEC owns the large majority of the in-ground copper wire that we use to provide Broadband Services on, therefore they are responsible for most of the physical repair of the circuits.

End User. The EU is the customer that uses and pays for the services that we render.

Premises. The location of which a customer resides or occupies.

Point of Contact and Technical Point of Contact, often used to represent the person at the Customer's PREM that is a repair tech would report to when on site or we would contact regarding connectivity.

Main Distribution Facility and Intermediate Distribution Facility. MDF is the Main location or concentration of Telco equipment often referred to as Telco Closet. IDF is secondary location and is an extension of the MDF. Often the IDF would be called the Demarcation point or the DMARC. See also MPOE below.

Minimum Point of Entry. Location where the LEC delivers all Telco Services in a building. This is not the IDF but can be used interchangable with MDF in some cases.

Network Interface or Network Interface Unit. This is the piece of equipment that the LEC will deliver a FRAME or ATM/HDSL T1 on. It is TELCO GRADE and will not be touched by anyone other then the LEC.

Inside Wiring. This is a connection that runs from the MPOE or MDF to the DMARC or point of termination, and extends till it plugs into the DSL or T1 Router.

Shared Line Asymmetric Digital Subscriber Line. SL-ADSL is an asymmetric service which means that the information is coming down to the user from the Internet at a faster speed than going from the customer's PC to the Internet. SL-ADSL is Internet access delivered over an EXISTING phone line, which means that your data traffic shares the same copper wires as your analogue voice signal. SL-ADSL is ideal for residential users and is generally the flavor of DSL that the local telephone companies sell. SL-ADSL is not suited for business use even though some providers try to sell it as a business product. As well, SL-ADSL is not suited for hosting Web or e-mail servers. SL-ADSL uses a bridge which provides little to no security, making your network vulnerable to attacks. Because ABS is a business focused Internet Service Provider, we offer SL-ADSL only when there are no other options available.

The collection of several channels or streams of data which are combined into one high-speed connection.

Asynchronous Transfer Mode. A high-speed method for transferring voice, video and data.

The amount of data that can flow through a given communications channel. The greater the bandwidth, the more data can travel through the channel.

A device that connects two local-area networks (LANs), or handles data between a users computer and the Internet. Bridges are most commonly used to support ADSL service.

Central Office (CO)
Central Office. The location where the ABS DSLAM's reside.

Customer Premises Equipment. CPE refers to equipment that resides at the customer's location (example: a router). ABS provides the CPE for DSL service (a DSL router).

Dynamic Host Configuration Protocol. A protocol for assigning dynamic IP addresses to computers on a network or on the Internet. With dynamic IP addressing, a device can have a different IP address every time it connects to the network or to the Internet. Some telephone companies use dynamic IP addressing for their DSL services. With dynamic IP addressing you cannot host a Web or e-mail server. ABS uses static IP addressing which allows you to host Web and e-mail servers, and even participate in video conferencing.

A connection using a modem and a standard telephone line to connect to the Internet. With dial-up service you must dial-up to connect to the Internet. Dial-up users must also deal with busy signals and dropped connections. With ABS DSL solutions you won't ever have to dial-up to the Internet, experience busy signals, or dropped connections - you will have a reliable always-on connection.

Domain Name System/Service translates domain names ( into IP addresses (

Domain name server
A server used for assigning text addresses (such as for specific computers and computer accounts on the Internet.

The direction of data flow on a data communications link, which occurs from the Internet down to the user.

Digital Subscriber Line. A technology that delivers high-speed data connections from the Central Office (CO) to the customer's location over existing copper wires.

Digital Subscriber Line Access Multiplexer. A piece of equipment located in the Central Office (CO) that assists in providing DSL to the customer.

Dynamic IP addressing
When an IP address is assigned to the user for the current session (Example: A current session would start when a user opens up the Internet application and is connected to the Internet and would end when the user ended the Internet application). Many telephone companies use dynamic IP addressing with their ADSL solutions. With dynamic IP addressing you are unable to host Web or e-mail servers or even participate in video conferencing.

A system designed to prevent unauthorized access to or from a private network. ABS SDSL routers can be configured with firewall functionalities that protect your network from outside attacks.

IDSL is a symmetric service that provides DSL technology over existing copper telephone lines. IDSL is an always-on connection and is billed at a flat monthly fee. It is used in cases where the End Users service address is too far from the CO to allow for SDSL connectivity.

Internet Protocol. The main protocol that forms the basis of communication on the Internet.

IP address
Internet Protocol Address. A notation used to represent an IP address (Example:

Integrated Services Digital Network. An international communications standard for sending voice, video, and data over digital telephone lines. ISDN supports a data transfer rate of 128 Kbps. Unfortunately, with ISDN you experience call set-up delays and can be faced with huge monthly bills because ISDN usage is based on per minute fees. ABS IDSL has comparable speeds, but you pay only a flat monthly fee. Consequently, you are free to use the connection without having to worry about additional charges.

Local Area Network. A computer network that spans a relatively small area. Most LANs are confined to a single building or group of buildings.
Local loop

The copper line between a customer's premises and a Central Office (CO). DSL is added to the local loop, turning copper wire into a high-speed data link.

Million bits per second. A measure of how fast data is transported.

Network Address Translation is an Internet standard that enables local area networks (LAN) to use one set of IP addresses for internal traffic and a second set of addresses for external traffic.

Permanent Virtual Circuit. A PVC is a virtual circuit that is permanently available.

A device that securely handles data between the user's computer and the Internet.

Symmetrical Digital Subscriber Line is a symmetric service - the upstream speed is the same as the downstream speed. SDSL can deliver high-speed data communications at up to 1.54 Mbps. SDSL is a true business class product. SDSL has symmetrical speeds that make it possible to host Web or e-mail servers, even perform video conferencing and e-commerce. ABS SDSL comes with a router which, for a nominal fee, can be configured with firewall functionality that builds a barrier between your network and computer hackers.

Static IP addressing
An assigned IP address is used to connect to a network or the Internet. A static IP address comes with ABS DSL service which allows you to host Web or e-mail servers. With a static IP address businesses can also participate in video conferencing.

When a user sends information from a computer to the Internet (such as sending an e-mail). The faster the upstream speed, the faster data can move from your local network or PC to the Internet.

Virtual Private Network. A technology that lets the user create a connection through the Internet that is private and secure.

Web hosting
A service performed by ABS where businesses can house their Web sites with ABS. ABS will manage the site and ensure security.

<< back

Did you find this article helpful?