The advent of digital telephony has revolutionized office communications. Now, instead of a single office number and extension numbers, each office desk phone could have its own direct dial number. Now, when somebody calls you, their desk number can be displayed and you know exactly who is calling you.
Wireless infrastructure networks are constantly evolving. Often mobile service providers must maintain multiple generations in order to support new and legacy services. Unfortunately we don’t see this getting any easier anytime soon with the emergence of VoLTE and 5G on the horizon.