PBX Basics

Digital PBX: Line card technology Lack of redundancy High reliance on VAR Premise-based IP PBX: Server technology Dependant on main location for “brains”, VM, advanced features Require MPLS or private connection for multiple locs With all PBXs… Highly dependant on telco providers PRI/ Analog lines down = location not reachable MPLS/ Priv conn down = remote locations down Local environmental problems = location down

LAN Voice

Traditional PBXs & LANs Lots of wires! Cat 3 for digital phones Cat 5/6 for LAN Seeing Double Separate networks for voice & data Lots of circuits … Voice Circuits Internet Circuits MPLS/ Private Data Circuits

Traditional PBX/ LAN Facts Managed Locally Single Point of Failure Rich Expensive to acquire/maintain – Poor use of Cap Ex Technology aging on different depreciation curves Technology integration difficult Inefficient use of bandwidth/network Requires multi-specialty IT staff Scales poorly in growth scenarios Obsolete by Manufacturer design

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