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    • CNA Number

      CNA Number

      CNA stands for Customer Name and Address. The CNA number is a phone number for telephone company personnel to call and get the name and address for a phone number. If a telephone lineman finds a phone line he does not recognize, he can use the ANAC Number to find its phone number and then

    • NEBS (Network Equipment-Building System)

      NEBS (Network Equipment-Building System)

      NEBS (Network Equipment-Building System) is a standard for telephony equipment. NEBS was developed in the 1970's by Bell Labs (now Telcordia). Many equipment vendors build their equipment to NEBS standards, even when they do not intend for their equipment to be placed in a Central Office. Equipment vendors do this because compliance with the NEBS

    • Cell Phone Cloning

      Cell Phone Cloning

      Cell phone cloning refers to the act of copying the identity of one mobile telephone to another. This is usually done to make fraudulent telephone calls. The bill for the calls go to the legitimate subscriber. This made cloning very popular in areas with large immigrant populations, where the cost to “call home” was very

    • How to Block Caller-ID

      How to Block Caller-ID

      Always test as much as possible before relying on any technique to block Caller-ID. Some of these methods to block Caller-ID work in some areas, but not in others. Block Caller-ID For a Single Call Using a LASS Code Dial *67 before you dial the number. (141 in the United Kingdom) Block Caller-ID On All

    • TL1 (Transaction Language 1)

      TL1 (Transaction Language 1)

      TL1 (Transaction Language 1) is an element management protocol used primarily in the telecommunications industry. TL1 was designed by Bellcore (now Telecordia) in 1984 for use with its OSS (Operations Support System), NMA. TL1 is an MML (Man Machine Language), which means that TL1 messages should be readable and writeable by humans as well as

    • How to Find an IMEI

      How to Find an IMEI

      An IMEI, or International Mobile Equipment Identity, number is a number associated with a specific cell phone and can be used by authorities in a wide variety of countries to blacklist stolen cell phones, making them unusable to the thief, even if he/she replaces the phone’s SIM card. An IMEI number should not be confused

    • IS-54 and IS-136: TDMA

      IS-54 and IS-136: TDMA

      IS-54 and IS-136 are standards for TDMA American Digital Cellular. Mobile Frequency Range Rx: 869-894; Tx: 824-849 Multiple Access Method TDMA/FDM Duplex Method FDD Number of Channels 832 (3 users per channel) Channel Spacing 30Khz Modulation DQPSK Channel Bit Rate 48.6Kb IS-54 and IS-136: TDMA Security IS-54 and IS-136 use the CAVE (Cellular Authentication, Voice

    • CNAM (Calling NAMe)

      CNAM (Calling NAMe)

      CNAM (“Calling NAMe”) is an Intelligent Network (IN) service that displays a caller’s name on a digital readout. It is very similar to caller ID except that both the caller’s name and the calling number are displayed on the receiving end of the phone call. This feature only works if the person or organization being

    • TTY/TDD

      TTY/TDD

      TTY/TDD stands for a group of telecommunication devices that make it easier for deaf and/or mute people to talk over telephone lines. TTY stands for telephone typewriter, teletypewriter or text phone. TDD stands for Telecommunications Device for the Deaf. Usually these devices are all categorized under TTY/TDD. Sometimes TTY means manual devices such as typewriters,

    • How to Defeat Caller-ID Blocking

      How to Defeat Caller-ID Blocking

      One trick to defeat Caller-ID blocking is to forward your phone line to a friend who lives in another LATA. When your friend receives the anonymous phone call, have him use *69 Call Return to dial to offending party back. As he is now placing a long distance phone call, the telephone number of the

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