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Telephony and data services
PTT - Providers Of Telecoms Training
This online course introduces the facilities and capabilities of telephony and data services provided by mode...
This course provides an introduction to the principles and operation of circuit-switched telephony as used in...
Voice over IP systems
This online course describes the functional components and operation of telephony systems based on the Intern...
All Telephony courses at PTT - Providers Of Telecoms Training