A phone system. From your carrier.

Hosted PBX (also called cloud PBX or cloud phone system) is a phone system managed entirely by a provider in the cloud. You do not install, manage, or maintain any phone system hardware or software. The provider handles call routing, voicemail, auto-attendant, extensions, and the connection to the telephone network. You use softphone apps, web phones, or SIP desk phones to make and receive calls.

SIPNEX is an FCC-licensed carrier. RingCentral and Zoom Phone are platform companies that buy carrier capacity from wholesale providers. The SIPNEX difference: A-level STIR/SHAKEN attestation signed with our own certificate (not inherited B-level), carrier-direct pricing without platform markup, CNAM registration included, and the same carrier infrastructure used by our call center customers. You get carrier-grade service without the UCaaS platform overhead.

Hosted PBX is for businesses that want a turnkey phone system without managing infrastructure — typically offices under 50 people without dedicated IT staff. SIP trunking is for operations that run their own PBX or dialer software (VICIdial, Asterisk, FreePBX) and need raw trunk capacity at wholesale rates. If you run a call center with predictive dialing, you need SIP trunking, not hosted PBX. If you need desk phones for your office staff, hosted PBX is simpler.

Extensions with voicemail, auto-attendant (IVR), call forwarding, call transfer, ring groups, time-based routing, call recording, conference calling, music on hold, softphone apps, and SIP desk phone support. All backed by the same carrier infrastructure as our SIP trunking — A-level STIR/SHAKEN, CNAM registration, and carrier-grade call quality.

If your desk phones support SIP (most modern business phones from Yealink, Polycom/Poly, Cisco, Grandstream do), they work with SIPNEX hosted PBX. Configure the phone to register to our hosted PBX proxy with extension credentials. If you have analog phones, you need a SIP-compatible replacement or an ATA (Analog Telephone Adapter) to bridge them.

Yes. Standard FCC number portability applies. Port your existing numbers to SIPNEX through the LNP process (7 to 14 business days for local numbers). Your numbers continue working on your current provider until the port completes. No service interruption.

SIPNEX hosted PBX is priced per extension with included local and domestic calling. No platform fees. No feature tier upselling — all features are included. Contact us for current per-extension pricing. Compare to RingCentral ($20-$45/user/month) and Zoom Phone ($10-$26/user/month) — SIPNEX delivers carrier-grade features without the platform markup.

Yes. Many operations use SIPNEX hosted PBX for office staff (sales managers, admin, reception) and SIPNEX SIP trunking for their call center floor (VICIdial, predictive dialing). Different tools for different teams, same carrier, same A-level attestation, unified number management.