The Full form of SS1 is Signalling System 1 (500/20 Hz tones), or SS1 stands for Signalling System 1 (500/20 Hz tones), or the full name of given abbreviation is Signalling System 1 (500/20 Hz tones).
SS1 (Signalling System 1 (500/20 Hz tones))
Signalling System 1 (500/20 Hz tones) is known as SS1.
SS1 all full forms
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