Analog Voice Solution

Another commonly employed voice solution is EPABX/PA. EPABX is Electronic Private Automatic Branch Exchange and most commonly abbreviated as PBX i.e. private branch exchange. Thus it allows all users to share a certain number of external phone lines. The typical EPABX can also switch calls between a VoIP user and a traditional telephone user, or between two traditional telephone users. With a conventional PBX, separate networks are necessary for voice and data communications.