Linksys SPA941 Administration Manual page 95

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Billing Increment: The division by which the call is rounded. In the field it is common to see full-
minute billing on the local invoice while 6-second rounding is the choice of most long-distance
providers that bill their customers directly.
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Blocked Calls: Caused by an insufficient network facility that does not have enough lines to allow
calls to reach a given destination. May also pertain to a call from an originating number that is
blocked by the receiving telephone number.
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Bundled Service: Offering various services as a complete package.
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Call Completion: The point at which a dialed number is answered.
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Call Termination: The point at which a call is disconnected.
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CDR (Call Detail Records): A software program attached to a VoIP/telephone system that records
information about the telephone number's activity.
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Carrier's Carrier: Companies that build fiber optic and microwave networks primarily selling to
resellers and carriers. Their main focus is on the wholesale and not the retail market.
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Casual Access: Casual Access is when customers choose not to use their primary carriers to
process the long-distance call being made. The customer dials the carrier's 101XXXX number.
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CO (Central Office): Switching center for the local exchange carrier.
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Centrex: This service is offered by the LEC to the end user. The feature-rich Centrex line offers
the same features and benefits as a PBX to a customer without the capital investment or
maintenance charges. The LEC charges a monthly fee to the customer, who must agree to sign a
term agreement.
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Circuits: The communication path(s) that carry calls between two points on a network.
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Customer Premise Equipment: The only part of the telecommunications system that the customer
comes into direct contact with. Example of such pieces of equipment are: telephones, key
systems, PBXs, voicemail systems and call accounting systems as well as wiring telephone
jacks. The standard for this equipment is set by the FCC, and the equipment is supplied by an
interconnect company.
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Dedicated Access: Customers have direct access to the long-distance provider via a special
circuit (T1 or private lines). The circuit is hardwired from the customer site to the POP and does
not pass through the LEC switch. The dial tone is provided from the long-distance carrier.
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Dedicated Access Line (DAL): Provided by the local exchange carrier. An access line from the
customer's telephone equipment directly to the long-distance company's switch or POP.
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Demarcation Point: This is where the LEC's ownership and responsibility (wiring, equipment)
ends and the customer's responsibilities begin.
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Direct Inward Dialing (DID): Allows an incoming call to bypass the attendant and ring directly to
an extension. Available on most PBX systems and a feature of Centrex service.
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Dual Tone Multifrequency (DTMF): Better known as the push button keypad. DTMF replaces dial
pulses with electronically produced tones for network signaling.
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Enhanced Service: Services that are provided in addition to basic long distance and accessed by
way of a touchtone phone through a series of menus.
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Exchange Code (NXX): The first three digits of a phone number.
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