Crazytel Knowledge Base
Step-by-step setup guides, SIP trunk parameters, PBX configuration, and platform documentation.
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General
Generic Crazytel Guides
Explore topicCrazyPBX
All CrazyPBX setup articles
Explore topicCrazyAI
All about CrazyAI
Explore topicGetting Started
Learn the basics of using our platform
Explore topicSIP-Trunks
SIP trunk registration, IP authentication, codecs, and PBX trunks.
Explore topicSMS Center
Quick answers for sending, receiving, scheduling, Email-to-SMS, number management, opt-outs, logs, and delivery troubleshooting across the Crazytel SMS Center.
Explore topicAccount Management
Manage your Crazytel account, contacts, and billing details
Explore topicPremium Features
All about Crazytel's premium features
Explore topicFeatured Guides
Essential configuration guides and reference articles.
CrazyAI Voice API - outbound AI phone calls, call modes, voicemail detection and pricing
CrazyAI Voice API lets Grok Bot, ChatGPT, Claude and booking systems place outbound AI phone calls on a PAYG Hybrid SIP Trunk. $0.0285/1k chars TTS, $0.0063/min STT, $0.1520/min agent, $0 unanswered.
"Unauthorised" on outbound calls using a verified caller ID
Why some outbound calls using Verified Caller IDs fail.
Premium Ring Groups
Premium Ring Groups distribute inbound calls to multiple members. They support simultaneous, sequential, circular, and longest-idle ringing, plus schedules, holiday routing, announcements, recording, transcription, AI insights, alerts, webhooks, and secure download links.
SMS Center - Getting Started
This guide covers the basics for Crazytel's new SMS Center; inbound setup, outbound setup, contact lists, opt-out lists.
CrazyPBX - Sign in to the Crazyphone App
This guide covers how to sign in to the Crazyphone application for Mobile or Desktop.
CrazyPBX - How to make a CrazyPBX Extension
This guide covers how to make a CrazyPBX Extension, and what each option means.
Latest Documentation
Recently published and updated articles across all products.
SMS delivery status webhooks - delivery receipts (DLR) for the SMS API
Get real-time SMS delivery receipts by webhook. Set status_callback on the v2 SMS send, bulk-send or schedule-send API; signed HMAC-SHA256 events for sent, delivered, undelivered and failed with automatic retries.
CrazyPIN limits, security and troubleshooting - SMS OTP not sending, expired or locked codes
CrazyPIN troubleshooting: OTP SMS not sending, code expired, no attempts remain, send limit reached, daily SMS budget. Limits for resends, lifetime and wrong guesses, plus security tips.
CrazyPIN API integration - send and check SMS OTP codes, API key and idempotency
CrazyPIN API: get your API key, send an SMS OTP with POST /verifications, check the code, resend and cancel, and retry safely with Idempotency-Key. Server-side JSON API at api.crazytel.io.
How to set up and use CrazyPIN SMS one-time passcodes (OTP) - profiles, test code and pricing
How to use CrazyPIN: set up an SMS OTP profile in MyAccount, send a test code, verify customers by 2FA on signup and login. Australian mobiles only. Checking a code is free.
Premium Voicemail missed call SMS - automatically text callers who hang up
Premium Voicemail can automatically SMS a caller who hangs up during the greeting without leaving a voicemail. Reusable SMS templates, outbound SMS caller ID, billed per SMS segment.
CrazyAI Voice API - outbound AI phone calls, call modes, voicemail detection and pricing
CrazyAI Voice API lets Grok Bot, ChatGPT, Claude and booking systems place outbound AI phone calls on a PAYG Hybrid SIP Trunk. $0.0285/1k chars TTS, $0.0063/min STT, $0.1520/min agent, $0 unanswered.
Understanding Phone Number Ranges in Australia
Geographic phone numbers in Australia are allocated by the ACMA in ranges tied to Standard Zone Units (SZUs), not suburb by suburb. One SZU can cover many suburbs, so your suburb may not be listed directly and a nearby town or zone name appears instead. ACMA also allocates different ranges to different providers: Telstra holds many traditional ranges, and Crazytel is not partnered with Telstra, Optus, or other carriers, so the prefixes Crazytel offers in your area come from the ranges allocated to us and can differ from the pattern on Telstra or Optus numbers nearby. A different prefix is still a valid local number, calls work the same, and numbers can be ported between Australian providers.
Pre-Paid Billing Policy
Crazytel is a pre-paid service. Accounts must remain in credit at all times or all services are automatically suspended, and services cannot be unsuspended until the balance is back in credit. This is a system restriction that staff cannot override. Auto top-up is required on every plan except Pay-As-You-Go (P.A.Y.G). SIP trunk fees bill on the 1st of each month, and numbers bill on your DID billing date. Invoices starting with U are usage invoices for the month just gone, and invoices without a U are your phone number (DID) charges issued separately, so you typically receive 2 invoices each month. Invoices show as paid because every charge comes out of your account balance in real time: they are usage and tax records, not payment requests. If usage or charges exceed your top-ups, the balance can go negative and all services stop until you top up again. We do not send debt to a debt collector. Unpaid balances are written off when the account is closed, after a notice timetable: Day 0 email and SMS, Day 2 SMS, Day 7 email, Day 8 formal closure notice, and a final warning about 3 days before closure. Payment arrangements and hardship pauses are available, and the TIO can be contacted on 1800 062 058.
Calling 000 (Triple Zero) on Crazytel
Calls to 000 (Triple Zero) are free with priority access on every Crazytel service. On the new SIP Trunk network, 000 calls bypass every account check, including a disabled trunk, a negative balance, or a spend limit. A VoIP phone needs power and internet, so if your power or internet is down it cannot call 000. Always use a mobile phone to call 000 if you can.
CGNAT setup recommendations for SIP trunks and VoIP devices
Carrier-Grade NAT (CGNAT) settings for SIP trunks and VoIP devices. When your ISP uses CGNAT, enable NAT Helper on the SIP Trunk, set a 180 second registration period, and enable Keep Alive on the VoIP device to keep registrations active and fix connectivity or registration problems.
Crazy 5G mobile plans - SIM-only 5G on the Optus network, pricing and international roaming
Crazy 5G SIM-only mobile plans on the Optus network: 20GB $25, 50GB $35 or 100GB $45 per month, 5G speeds up to 150Mbps, calls and SMS included, $10 per day Zone 1 roaming, no lock-in contract.
How to add an authorised contact - powers, limits, and verification
Add an authorised contact in MyAccount under Account Management > Authorised Contact. They can act or speak for your account for support and verification, but cannot log in to the portal.