Back خدمة الهاتف المحمول المحسنة Arabic Improved Mobile Telephone Service Catalan Improved Mobile Telephone Service Spanish سرویس تلفن موبایل پیشرفته Persian Improved Mobile Telephone Service Ukrainian
The Improved Mobile Telephone Service (IMTS) was a pre-cellular VHF/UHF radio system which linked to the public telephone network. IMTS was the radiotelephone equivalent of land dial phone service. Introduced in 1964, it replaced Mobile Telephone Service (MTS) and improved on most MTS systems by offering direct-dial rather than connections through a live operator, and full-duplex operation so both parties could talk at the same time.
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