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  2. Design Line telephone - Wikipedia

    en.wikipedia.org/wiki/Design_Line_telephone

    After this time several new Design Line series telephones were marketed and discontinued. One example of a "Design Line" phone was model 140, marketed in the mid 90s. The phone was similar in size to the 2554 wall phone, but had unique features: Round buttons; Round receiver/microphone; Switchhook similar in shape to a slice of pie; Desk or ...

  3. No. 4 Electronic Switching System - Wikipedia

    en.wikipedia.org/wiki/No._4_Electronic_Switching...

    AT&T Long Distance was the primary customer for the switch. Driving development from the customer's perspective was AT&T VP Billy Oliver. [4] Previous tandem switching systems, primarily the No. 4 Crossbar switch, used analog voice signaling. The decision to switch in a digital voice format was controversial at the time, both from a technical ...

  4. Advanced American Telephones - Wikipedia

    en.wikipedia.org/wiki/Advanced_American_Telephones

    In addition, Advanced American Telephones manufactured phones serve as a portrayal of AT&T's home phone service and are seen in ads for it. Phones made today by Advanced American Telephones primarily include cordless telephones and some corded phones, such as Trimline, and some multi-line desk phones. Advanced American Telephones also holds the ...

  5. AT&T Merlin - Wikipedia

    en.wikipedia.org/wiki/AT&T_Merlin

    AT&T Merlin five-button telephone (voice terminal) manufactured in early 1980. AT&T Merlin is a corporate telephone system by American Telephone and Telegraph (AT&T) that was introduced in late 1983, when it was branded American Bell Merlin. After the breakup of the Bell System in 1984, it was rebranded and later also supplied by Lucent and Avaya.

  6. 5ESS Switching System - Wikipedia

    en.wikipedia.org/wiki/5ESS_Switching_System

    The standalone VCDX was also capable of serving as a switch for very small wire centers (a CDX- Community dial office) of fewer than ~400 lines. However, for small wire centers, 400-4000 lines, that function was usually served by RSM's, a 5ESS "Remote SM", ORM's or Wired ORM's. The RSM is controlled by T1 lines connected to a DLTU unit.

  7. QLT Consumer Lease Services - Wikipedia

    en.wikipedia.org/wiki/QLT_Consumer_Lease_Services

    QLT Consumer Lease Services, formerly AT&T Consumer Lease Services, is a New Jersey–based telephone equipment leasing company. The company provides telephone leasing services to residences and small businesses in the United States. These services include next business day replacement of the leased product for any reason.

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