0️⃣1️⃣🧾🌐

#isdn #digital network #binary code #telecommunications network #network technology

📞🌐🔀

#call routing #network switch #digital exchange #VoIP switch #telecommunications network

📞🗼📡

#telecommunications network #phone lines #signal tower #communications provider

☎️🕸️

#phone net #landline network #telecommunications network #interconnected phones #network diagram

📡➡️📶🏠

#last mile connectivity #broadband access #internet service provider #telecommunications network #signal to home #FTTH

☎️🔎🌍

#international calls #worldwide communication #telecommunications network #long distance network