Voice over Internet Protocol (VoIP), is a technology that allows you to make voice calls using a Internet Line or special lines like E1/T1/MPLS instead of a regular (or analog) phone line. PBX system based on asterisk or freeswitch is best solution for centralized management and providing all required features for your organization.
VOIP setup utilizing high availability can be integrated with different lines like MPLS, PRI, E1, T1, SIP accounts, Direct IP transfer, AIX Trunk
VOIP setup utilizing high availability can be integrated with SIP trunks, Aix trunk, Direct IP transfer with different VOIP providing portals
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