Calling party

callercall originatorcallcall source
The calling party (in some contexts called the "A-Number") is a person who (or device that) initiates a telephone call.wikipedia
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Telephone call

callphone callphone calls
The calling party (in some contexts called the "A-Number") is a person who (or device that) initiates a telephone call.
A telephone call is a connection over a telephone network between the called party and the calling party.

Called party

calleebe calledcall receiver
The person who, or device that, receives a telephone call is the called party.
The person who (or device that) initiates a telephone call is the calling party.

Calling-party camp-on

* Calling-party camp-on
Such systems may or may not issue a system blocking signal to inform the calling party of the access delay.


In some countries, it is common etiquette for a call originator to identify himself first instead of the receiver, when the connection is established.


modemsdial-up modem56k modem
Modems and fax machines use different tones when originating or answering a connection, which may be a source of problems for the user.


fax machinefacsimilefax machines
Modems and fax machines use different tones when originating or answering a connection, which may be a source of problems for the user.

Sports radio

Sportssports talkall-sports
A widespread programming genre that has a narrow audience appeal, sports radio is characterized by an often-boisterous on-air style and extensive debate and analysis by both hosts and callers.

Toll-free telephone number

toll-freetoll-free number800 number
For the calling party, a call to a toll-free number from a landline is free of charge.

Direct distance dialing

direct dialdirect distance dialdirect distance dialling
Direct distance dialing (DDD) is a telecommunication service feature in which a caller may, without operator assistance, call any other user outside the local calling area.

Telephone number

phone numbertelephone numbersphone numbers
Telephone numbers are entered or dialed by a calling party on the originating telephone set, which transmits the sequence of digits in the process of signaling to a telephone exchange.

Caller ID

caller line identificationCLIcall display
Caller ID (caller identification, CID), also called calling line identification (CLID), Calling Line Identification (CLI), calling number delivery (CND), calling number identification (CNID), calling line identification presentation (CLIP), or call display, is a telephone service, available in analog and digital telephone systems, including VoIP, that transmits a caller's telephone number to the called party's telephone equipment when the call is being set up.

List of telephony terminology

call originator - (or calling party, caller or A-party) a person or device that initiates a telephone call by dialling a telephone number.

Distinctive ring

ringing pattern
Regardless of what ringing pattern the called party hears, the calling party hears the standard ringing pattern.

Call origination

Call origination, also known as voice origination, refers to the collecting of the calls initiated by a calling party on a telephone exchange of the PSTN, and handing off the calls to a VoIP endpoint or to another exchange or telephone company for completion to a called party.

Zenith number

WX numberZenithZenith" X-XXXX
A Zenith number was a special type of telephony service which allowed a calling party to call the number's owner at no charge by requesting the call from a switchboard operator and citing the "Zenith", "Enterprise" or "WX" number.

Operator assistance

operator-assistedassistCall Operator
Operator assistance refers to a telephone call in which the calling party requires an operator to provide some form of assistance in completing the call.

Collect call

1800 Reversecollectcharges reversed
A collect call in Canada and the United States, known as a reverse charge call in other parts of the English-speaking world, is a telephone call in which the calling party wants to place a call at the called party's expense.

Busy signal

engaged tonebusybusy tone
A busy signal (or busy tone or engaged tone) in telephony is an audible or visual signal to the calling party that indicates failure to complete the requested connection of that particular telephone call.

Call-progress tone

Number unobtainable tonetones
The tones are generated by a central office or a private branch exchange (PBX) to the calling party.


Caller (telecommunications), a party that originates a call

Automatic number identification

ANIautomatic number identification (ANI)the caller's number
Modern ANI has two components: information digits, which identify the class of service, and the calling party billing telephone number.

Misdialed call

wrong numbermisdialmisdialled calls
The recipient of a wrong number is usually unknown to the caller.

Telephone exchange

exchangescentral officeexchange
When a calling party lifted the receiver, the local loop current lit a signal lamp near the jack.

Last-call return

*691471call return
The service may also offer the facility to place a call to the calling party.