Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym STM-4 is...

STM-4 is

  • 622.080 Mbits/ Second

STM-4 is also in:

Acronym Definition Searched: MSI DOTS QPE XMTR C-E 27215 LWP WUCR IAAIEF SAL FXS OD WNZS WHHS GTM