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IP PBX systems and unified communications platforms
The platform behind the phones: PBX appliances and UC systems sized by extensions, concurrent calls and site count.
Size by extensions and concurrency
IP phones and unified communication systems are a supply line here, and the brand navigation carries two PBX specialists — Grandstream and Yeastar. PBX quotations need three numbers: extensions, concurrent calls, and sites. With those, the desk quotes the appliance class and any licences the design names.
Endpoints and platform belong on one inquiry. If the phones are already chosen, list them; the quotation will keep platform and endpoints consistent.
PBX inquiry checklist
- Extensions now, and the growth the design allows for
- Concurrent call estimate
- Single site or multi-site with central control
- Endpoint models registering to the platform
Extensions, concurrency, sites — in that order
Extensions size the platform's capacity, concurrency sizes its engine, and site count decides its shape. Of the three, concurrency is the one buyers underestimate: an office where a third of the extensions call at once needs a very different platform from one where a tenth do. Give an honest concurrency estimate — the quotation is sized from it.
Growth headroom is the fourth number. Platforms are replaced reluctantly, so the design usually buys capacity above today's extension count. State the headroom the project wants carried and the quoted class will hold it.
Common questions
Which PBX brands are listed?
Grandstream and Yeastar are the navigation brands for PBX lines on this desk.
Can you quote platform and phones together?
Yes — that is the recommended pattern; send both lists in one inquiry.
What if we outgrow the quoted platform?
State the growth you expect at inquiry stage; platforms are quoted with the headroom the design names, and expansion paths are noted on the quotation.