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  2. Small Business Phone System: A Guide to Service Types ... - AOL

    www.aol.com/small-business-phone-system-guide...

    Learn about conventional and modern small business phone services, from technologies to equipment, to decide which solution is best for your company. Small Business Phone System: A Guide to ...

  3. The Benefits of VoIP Phone Systems - AOL

    www.aol.com/benefits-voip-phone-systems...

    VoIP phone systems for small businesses. There are plenty of service providers for companies ready to choose a business phone system. Vendors charge a monthly fee per user, and many offer a ...

  4. Business telephone system - Wikipedia

    en.wikipedia.org/wiki/Business_telephone_system

    A business telephone system differs from an installation of several telephones with multiple central office (CO) lines in that the CO lines used are directly controllable in key telephone systems from multiple telephone stations, and that such a system often provides additional features for call handling.

  5. List of telephone switches - Wikipedia

    en.wikipedia.org/wiki/List_of_telephone_switches

    List of the mainly electro mechanical switching systems from Hasler AG Bern, which were used in public telephone network in Switzerland for many decades. Hasler AG finally merged into Ascom in 1987. HS 25 (modified from the Ericsson OL-100 system with double relays and 25-point selector (Ericsson license), mainly used for small villages and ...

  6. 1A2 Key Telephone System - Wikipedia

    en.wikipedia.org/wiki/1A2_Key_Telephone_System

    The most commonly used telephone sets for the 1A2 systems were modifications of the Bell System standard 500-series telephones for rotary dial systems, and the 2500-series Touch-Tone desk sets. For key system operation these sets were equipped with a set of push-buttons ( keys ) and additional internal contact springs to control the additional ...

  7. Telephony Application Programming Interface - Wikipedia

    en.wikipedia.org/wiki/Telephony_Application...

    TAPI allows applications to control telephony functions between a computer and telephone network for data, fax, and voice calls. It includes basic functions, such as dialing, answering, and hanging up a call. It also supports supplementary functions, such as hold, transfer, conference, and call park found in PBX, ISDN, and other telephone systems.

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