Infrastructure of fixed networks
Here were compiled the informations on PSTN and ISDN connections. For a long time these indicators were in great demand, but with the emergence of Voice over IP (VoIP), these technologies are no longer in use.
Here were compiled the informations on PSTN and ISDN connections. For a long time these indicators were in great demand, but with the emergence of Voice over IP (VoIP), these technologies are no longer in use.