Secure Communication Channels
Organizations must ensure that communications channels are secured. This section discusses voice, multimedia collaboration, remote access, and virtualized networks.
Voice communication channels include PSTN, POTS, and PBX systems that are used to manage most voice communications over telecommunications networks. POTS systems use analog communication, while PSTN was originally analog but has transitioned to use mostly digital communication.
Analog communication supports voice quality and basic phone features, including phone transfer. Digital communication goes beyond analog to support music on hold, VoIP integration, and alarms. In addition, digital systems do not rely on the copper wiring used by analog ...