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  2. List of SIP response codes - Wikipedia

    en.wikipedia.org/wiki/List_of_SIP_response_codes

    An intermediary machine or process rejected the call attempt. [25] This contrasts with the 607 (Unwanted) SIP response code in which a human, the called party, rejected the call. The intermediary rejecting the call should include a Call-Info header with "purpose" value "jwscard", with the jCard [26] with contact details. The calling party can ...

  3. Call detail record - Wikipedia

    en.wikipedia.org/wiki/Call_detail_record

    A call detail record contains data fields that describe a specific instance of a telecommunication transaction, but does not include the content of that transaction. By way of simplistic example, a call detail record describing a particular phone call might include the phone numbers of both the calling and receiving parties, the start time, and duration of that call.

  4. SIM Application Toolkit - Wikipedia

    en.wikipedia.org/wiki/SIM_Application_Toolkit

    SIM Application Toolkit (STK) is a standard of the GSM system which enables the subscriber identity module (SIM card) to initiate actions which can be used for various value-added services. [1] Similar standards exist for other network and card systems, with the USIM Application Toolkit (USAT) for USIMs used by newer-generation networks being ...

  5. Short Message Service technical realisation (GSM) - Wikipedia

    en.wikipedia.org/wiki/Short_Message_Service...

    Call flow for the mobile terminated Short Message Service. The figure to the right depicts a call flow for mobile-terminated Short Message delivery. [1] For the sake of simplicity, some of the interactions between the VMSC and VLR, and VMSC and Handset, have been omitted, and only the case when SMS home routing is not in use is shown.

  6. Mobile network codes in ITU region 3xx (North America)

    en.wikipedia.org/wiki/Mobile_network_codes_in...

    Metro: Metro by T-Mobile: Operational: MVNO: Former MetroPCS; CDMA2000 1900 / CDMA2000 1700 shut down in 2015; LTE 1700 merged with T-Mobile US [131] 311: 670: Pine Belt Wireless: Pine Belt Cellular Inc. Operational: LTE 700: Alabama; [131] CDMA shut down [194] 311: 680: GreenFly LLC: Unknown: GSM 1900: Iowa [131] [77] 311: 690: TeleBEEPER of ...

  7. List of mobile virtual network operators in the United States

    en.wikipedia.org/wiki/List_of_mobile_virtual...

    Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the four major cellular carriers in the country—AT&T Mobility, Boost Mobile, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.

  8. Customer proprietary network information - Wikipedia

    en.wikipedia.org/wiki/Customer_proprietary...

    Customer proprietary network information (CPNI) is the data collected by telecommunications companies about a consumer's telephone service. [1] It includes the time, date, duration and destination number of each call, the type of network a consumer subscribes to, and certain other information that appears on the consumer's telephone bill. [2]

  9. Telecommunications mediation - Wikipedia

    en.wikipedia.org/wiki/Telecommunications_mediation

    Aggregation of partial call detail records related to the same call; Format change and call detail record normalization; Business transformation of data; In a telecom billing scenario, mediation is the first step after receiving a call detail record. The mediated call detail record files are forwarded to a rating engine, which calculates the ...