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How to explain what is ss7?


Common Channel Signaling System No. 7 (i.e., SS7 or C7) is a global standard for telecommunications defined by the International Telecommunication Union (ITU) Telecommunication Standardization Sector (ITU-T). The standard defines the procedures and protocol by which network elements in the public switched telephone network (PSTN) exchange information over a digital signaling network to effect wireless (cellular) and wireline call setup, routing and control.

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Max number of satellite hops allowed in voice communication is:
a) only one
b) more han one
c) two hops
d) four hops
What is a matrix in Telecommunication?