# SIP Trunks vs CrazyPBX Extensions - quick comparison

> Category: General
> Canonical URL: https://crazytel.com.au/knowledgebase/article/sip-trunks-vs-crazypbx-extensions-whats-the-difference

Standard SIP works directly with an ATA or phone, no PBX required. Hybrid adds office calling; CrazyPBX supplies hosted extensions. See the full comparison for PAYG, Crackers and extension prices.

#1 SIP Trunks vs CrazyPBX Extensions - quick comparison




Standard Crazytel SIP trunks work directly with an ATA, IP phone or softphone without an existing PBX. Hybrid SIP trunks add Crazytel-provided hold, transfer and internal calling. CrazyPBX is a hosted phone system with managed extensions, not a requirement for every basic phone or voicemail setup.




For the detailed product comparison and current reference prices, read Crazytel SIP Trunks vs CrazyPBX - ATA phones, plans and prices. This overview and that guide replace the older PBX-only wording.




#2 The practical difference



- Standard SIP: compare this first for one phone that only needs to make and receive calls. A compatible ATA, IP phone or softphone can connect directly. An existing PBX is optional.

- Hybrid SIP: compare this for hold, transfers, internal calling and office features on trunks without a separate PBX. It also works with your own PBX.

- CrazyPBX: compare this for a hosted-extension system. CrazyPhone works with standard and Hybrid trunks on mobile and desktop alike.




#2 Do not confuse product prices with bundled plans




The published Business SIP PAYG plan fee is $0 plus $0.50 per standard SIP trunk per month. The $35 figure is the Crackers bundle, not the minimum SIP price or the PAYG fee. CrazyPBX PAYG is $1 per extension and CrazyPBX Business is $15 per extension. Phone-number rental, chargeable calls and optional features are separate. These AUD including GST reference prices were checked on 30 September 2026; read the current product page and matching CIS before ordering.




#2 Voicemail and ring groups




Premium Voice Suite apps, including voicemail and ring groups, can be attached to a Crazytel number used with standard or Hybrid SIP trunks. You do not need CrazyPBX solely for those features. The published Voice Suite base price is $1 per month per app instance, with optional usage charges where listed.




#2 Sources



- Business SIP plans and no-PBX FAQ

- Hybrid SIP Trunks

- CrazyPBX plans

- Premium Voice Suite

- Current Critical Information Summaries




For help choosing a product, call 1800 272 998. A general comparison does not confirm which plan is active on your account.