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Support & Technical Documentation

SIP Trunks vs CrazyPBX Extensions - quick comparison

General documentation and configuration reference.

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General Updated 22 Oct 2026 2 min read 1,023 views
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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.

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.

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.

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.

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.

Sources

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

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