Engineering360 News6 年
Chapter 3: The Hardware Infrastructure
In some respects, the latest developments in VoIP are an extension of this pattern. Note The basic architecture of the PBX over the past 100 years has evolved similarly to that of the PSTN and its ...
Engineering360 News6 年
Chapter 2: The Hardware Infrastructure
In some respects, the latest developments in VoIP are an extension of this pattern. Note The basic architecture of the PBX over the past 100 years has evolved similarly to that of the PSTN and its ...