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- ALI (Automatic Location Identification)
- A 9-1-1 Feature by which the name, address and responding agencies associated with the number of the telephone used to dial 9-1-1 is displayed at the PSAP at the time the call is answered.
- ANI (Automatic Number Identification)
- The number transmitted through the network identifying the calling party.
- ARIN (American Registry for Internet Numbers)
- A non-profit organization established for the purpose of administration and registration of Internet Protocol (IP) numbers.
- ATM (Asynchronous Transfer Mode)
- A high-speed switching technique that uses fixed size cells to transmit voice, data and video.
- BAN (Billing Account Number)
- BELLCORE
- An organization owned jointly by the Bell regional holding companies that may in the future be owned partially or totally by other persons. The organization conducts research and development projects for its owners, including development of new telecommunications services. Bellcore also provides certain centralized technical and management services for the regional holding companies and also provides generic requirements for the telecommunications industry for products, services and technologies www.bellcore.com
- CAC (Carrier Access Code)
- A dialing sequence used by the general public to access a preferred provider of service.
- Calling Records
- The CPUC considers calling records to be the records of calls made from a subscriber's telephone no matter how recorded and regardless of whether such information appears in the subscriber's monthly telephone service bill.
- CARE (Customer Account Record Exchange)
- The process of exchanging customer account information between local and long distance carriers. Every time a local carrier signs up a new customer, or every time an existing customer changes their PIC code, thereby changing their long distance carrier, the local carrier is responsible for notifying the long distance carrier. This applies even when the customer is keeping their current LD carrier while changing local carrier: the local carrier is still supposed to notify the LD carrier.
- Casual PICing
- This is when the customer has chosen one primary long distance carrier (the long distance carrier they are "pic'd" to), but occasionally wants to make a call using another long distance carrier. In order to route the call through the alternative long distance carrier, the customer dials the carrier's PIC code before entering the telephone number. This is exactly the process for all those "Dial 10221" commercials. Because the customer does not sign up with this alternative carrier, they are only "casually" picing them. Some long distance carriers will not accept casual picing, and will only let you use them if you have pre-registered with them (like Cable & Wireless).
- CCB (Common Carrier Bureau)
- A branch of the FCC that monitors the telephone industry.
- Central Office Switch
- A switch used to provide telecommunications services including (1) End Office Switches which are Class 5 switches from which end-user Exchange Services are directly connected and offered, and (2) Tandem Office Switches which are Class 4 switches which are used to connect and switch trunk circuits between and among central office switches. Central office switches may be employed as combination end office/tandem office switches (combination Class 5/Class 4).
- CIC (Carrier Identification Codes)
- CICs provide routing and billing information for calls from end users via trunk-side connections to inter-exchange carriers and other entities.
- CFA (Connecting Facility Assignment)
- Long Distance Carriers must give Local Access Carriers (TelePacific) "CFA", which are directions about where specifically on our interconnecting equipment to physically put the circuit.
- CLASS (Custom Local Area Signaling Services)
- Consists of number-translation services, such as call-forwarding and caller identification, available within a LATA.
- CLC (Competitive Local Carrier)
- The same thing as a CLEC.
- CLEC (Competitive Local Exchange Carrier)
- Any company or person authorized to provide local exchange services in competition with an ILEC. The CPUC's (California Public Utility Commission's) official definition is " Competitive Local Carrier (CLC) means a common carrier that is issued a Certificate of Public Convenience and necessity (CPCN) after the effective date of July 24, 1995, to provide local exchange telecommunications service for a geographical area specified by such carrier. There are two CLEC types: Facilities-based and Non-facilities-based, see definitions.
- CLLICODE (Common Language Location Identifier)
- A code, which identifies a customer at a physical address. (All codes are of an abbreviation for the city, state, an identifier for that particular building, and an identifier for the customer on a particular floor.)
- CO (Central Office)
- A LEC (Local Exchange Carrier) office that has a switch.
- Conduit
- Pipe or tubing used to pass telephone cables through to a demarc.
- CPCN (Certificate of Public Convenience and Necessity)
- A certificate that must be filed by every CLEC with the CPUC.
- CPE (Customer Provided Equipment)
- CSR (Customer Service Representative)
- CSU or CSU/DSU (Channel Service Unit/Data Service Unit)
- A device to terminate a digital channel on a customer's premise. It performs certain line coding, line-conditioning and equalization functions, and responds to loop-back commands sent from the central office. A CSU sits between the digital line coming in from the central office and devices such as channel banks or data communications devices and is found in every digital link and allows the transfer of data at a range greater than 56 Kbps.
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