Glossary of Terms

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Molly Katolas

Updated

API DSL LSP
Block EU LSR
Block - Assignee/Holder/Owner FCC NANC
Block Available FOC NNSP/ONSP
BOC/RBOC ICA NPA/NPA-NXX
Bonding ILEC NPAC
BTN/ATN Intermodal Porting OCN
Centrex ISDN Pooling/Pooled Numbers
Class 1/2/3/ Interconnected VoIP LATA PSTN
CLEC LEC RCF
CNAM LERG RespOrg
COB LIDB SPID/Alt SPID
CSR LNP TN/TNs
DID LOA Trading Agreement/Partner
Dry Loop LRN WTN


 

API

Application Programming Interface. A set of rules used to allow interaction between different software components. In more simple terms, it's a way to use services that a web portal offers, but it's a 'behind the scenes' approach that developers generally use.

 

Block

In NPAC terms, a group of 1,000 contiguous telephone numbers in a range of NPA-NXX-X000 to X999

 

Block –Assignee/Holder/Owner

The service provider to who has been assigned the 1,000 block of numbers

 

Block Available

A 1,000 block of numbers that is not assigned to a service provider.

 

BOC/RBOC

Bell Operating Company / Regional Bell Operating Company. This is identified as any company that was owned or controlled by AT&T prior to the AT&T divestiture action. Regional BOCs are a combination of the 7 companies formed.

 

BONDING

Often refered to as Bonded Carriers, E-bonded Carriers, or Non-bonded Carriers. Bonding refers to the connectivity and method for sending/receiving information between customer/vendor and a CLEC/LEC/TP. A bonded carrier allows electronic system-to-system order entry, sending and responses, while non-bonded carriers are managed in a manual method like a fax, GUI (portal), email or paper form.

 

BTN/ATN

Billing Telephone Number / Account Telephone Number. Sometimes these are used interchangeably, and other times they are used as separate items, based on the carrier of record. Generally speaking, the BTN is the main telephone number on a customer's account.

 

CENTREX

Centrex is a feature line on a telephone number that an end user has activated with their carrier. It works like a PBX line, by providing switching services at a central office, rather than the customer premise. Most carriers require this feature to be disabled/removed prior to porting.

 

Class 1/2/3 Interconnected VoIP

Class 1: A VoIP service provider that interfaces directly with the PSTN and is able to receive numbering assignments from the North American Numbering Plan Administration (NANPA).

Class 2: A VoIP service provider that relies on a provider for PSTN access, and access to telephone numbers.

Class 3: A reseller of Class 1 and 2 VoIP providers.

 

CLEC

Competitive Local Exchange Carrier. This is one of many terms to identify an organization offering local telephone services.

 

CNAM

Caller Name. This service is a subscription to Caller ID with Name services.

 

COB

Copy of Bill or Bill Copy.

 

CSR

Customer Service Record. This is the record of information that the current carrier keeps on file, and what they reference against when receiving a request to port a number

 

DID

Direct Inward Dial. This is another way of saying telephone number.

 

DRY LOOP

Also known as standalone DSL. In the earlier years of DSL service, it was required that a customer have what is known as a dry loop, which is a dedicated DSL line as opposed to today's shared-line DSL. Shared-line DSL indicates a line used only for internet, and not shared for voice services.

 

DSL

Digital Subscriber Line. This is the technology that provides internet access via the transmission of digital data across the local telephone network.

 

EU

End User. This is generally the person actually picking up the phone and making a call.

 

FCC

Federal Communications Commission. The FCC is the organization that regulates interstate and international communications by radio, television, wire, satellite and cable in all 50 states, the District of Columbia and U.S. territories.

 

FOC

Firm Order Commitment. This is the 'permission' the current carrier gives to a winning carrier to port a number. Once an order has received FOC, it has been approved to port.

 

ICA

Interconnection Agreement. This is a business contract between LEC/CLECs for the purpose of interconnecting their networks and exchanging telecommunications traffic. These are typically very complex contractual agreements that can take months to set up and come at a large expense.

 

ILEC

Incumbent Local Exchange Carrier. This is one of many terms to identify an organization offering local telephone services.

 

Intermodal Porting

Porting telephone numbers between wireline and wireless service providers

 

ISDN

Integrated Services Digital Network. This is defined as communication standards that allow the simultaneous transmission of voice, data and video over the PSTN.

 

LATA

Local Access Transport Area. The region where LECs cannot transport a call without involving an interexchange carrier (IXC).

 

LEC

Local Exchange Carrier. This is one of many terms to identify an organization offering local telephone services.

 

LERG

Local Exchange Routing Guide. A database owned by Telcordia which provides information regarding owned NPA-NXX at the block level.

 

LIDB

Line Information DataBase. The database where specific CNAM provisioning, as well as collect call acceptance, and 3rd party billing are identified.

 

LNP

Local Number Portability. The process of porting a number from one carrier to another.

 

LOA

Letter of Agency or Letter of Authorization. A signed agreement indicating that the end user wishes to switch service to a different provider.

 

LRN

Local Routing Number. A 10-digit number used to identify a switch that holds ported or pooled numbers. Calls to ported or pooled numbers are routed based on the NPA-NXX of the number's associated LRN.

 

LSP

Local Service Provider. A company that provides local telephone service, and generally describes the company that has the relationship with the actual end user.

 

LSR

Local Service Request. This is the order that carriers submit to other carriers in order to port a number

 

NANC

North American Numbering Council. Adopted by the FCC in 1995, NANC provides advice and recommendations to the FCC regarding numbering issues.

 

NNSP/ONSP

New Network Service Provider/Old Network Service Provider. Fields identified on a standard LSR for porting to identify which carrier SPID will be the new provider of services, and which will be the old provider of services.

 

NPA/NPA-NXX

The first 3 digits (in the case of NPA) or first 6 digits (in the case of NPA-NXX) of a telephone number or LRN.

 

NPAC

Number Portability Administration Center. Operated by Neustar, the NPAC is the central mediation center for all LNP activity.

 

OCN

Operating Company Number. Used similarly to a SPID, each carrier has an OCN to be used to identify intercarrier transactions.

 

Pooling/Pooled Numbers

Pooling allows the assignment of numbers in blocks of 1,000 to a requesting carrier.

 

PSTN

Public Switched Telephone Network. The network of the world's public circuit-swtiched telephone networks. In short, this is what allows any telephone in the world to communicate with any other telephone.

 

RCF

Remote Call Forwarding. This is a feature an end user might put on their line that allows a number to be remotely forwarded. Most carriers require this feature to be disabled/removed prior to porting.

 

RespOrg

Responsible Organization. In relation to toll-free telephone numbers, this means the 'current' carrier of record.

 

SPID / Alt SPID

Service Provider ID. A 4-digit alpha-numeric code that identifies the owner of record in NPAC. The Alt SPID (defined as Alternate SPID) is a 4-digit alpha-numeric code that identifies a second service provider associated with a telephone number.

  

TN/TNs

Telephone Number(s)

 

Trading Agreement / Partner

Sometimes refered to as TPA/TP. A trading agreement is similar to an ICA (Interconnection Agreement) in that it allows LEC/CLECs to determine conditions in which they will conduct the exchange of porting information. Trading Agreements are generally easier and quicker to set up than ICAs; they don't require as much legal language and are less expensive. Some carriers require these, while others do not.

  

WTN

Working Telephone Number. This is a number on the end user's account that is not the main (BTN) number, but an additional number on the account.

 

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