IP-PBX Phone Systems - business phone systems, on premise appliances by size

CompletePBX IP-PBX is a full range of converged PSTN + VoIP telephony solutions for businesses of any kind, developed & produced by Xorcom
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IP PBX Appliances

CompletePBX IP-PBX: Ideal for Any VoIP & Hybrid Phone System Business Communication Scenario

Here are just a few examples of how the CompletePBX business phone system can integrate into your network to meet all your communications requirements:

Standard office topology based on CompletePBX Blue Steel and CXR1000 for mixed PSTN and VoIP environments.
Sample legacy topology based on existing legacy PBX integrated with CompletePBX Blue Steel and CXR1000 for mixed PSTN and VoIP environments.
High Availability High availability solution based on dual CompletePBX Blue Steel IP-PBX.

High availability solution based on dual CompletePBX Blue Steel IP-PBX.

Sample multi-site topology based on Blue Steel IP-PBX in the headquarters and CXR1000 in the branch offices.

Other related materials:

What is IP PBX – the definition.