# Crulon Docs > Guides, integration setup and developer docs for Crulon, the AI-first business phone system: setting up a workspace and an AI agent that answers calls, connecting Apps and your own systems, and Custom Actions that call your own API in the middle of a call. Every page is also available as Markdown: add `.md` to its address. The whole site in one file: https://docs.crulon.ai/llms-full.txt - Guides: Set up Crulon and run calls with your team - [Get started](https://docs.crulon.ai/guides.md): Create your workspace, get a phone number and put your first AI agent on the line. - **Calls** - [Get and manage phone numbers](https://docs.crulon.ai/guides/phone-numbers.md): Buy a local or toll-free number, choose who answers and calls from it, get it ready for texting, and release it when you no longer need it. - [Build a Call Flow](https://docs.crulon.ai/guides/call-flows.md): Decide what happens to every call to a number: business hours, a phone menu, your team, a queue, the AI agent and voicemail, drawn as steps on one canvas. - [Set up call queues](https://docs.crulon.ai/guides/call-queues.md): Hold callers in line with music and connect them one at a time as your team becomes free, with your choice of who gets the next call and where callers go when the wait runs out. - [Recording and voicemail](https://docs.crulon.ai/guides/recording-and-voicemail.md): Choose which calls are recorded and transcribed, pause or stop a recording during a call, play recordings back, and take voicemails with a Call Flow. - [Register your numbers for texting](https://docs.crulon.ai/guides/texting-registration.md): What US and Canadian carriers need before your numbers can send texts, where to register in Trust Center, and what happens while it’s reviewed. - [Set up desk phones](https://docs.crulon.ai/guides/desk-phones.md): Connect an IP desk phone or a softphone to Crulon so it rings with the browser, makes calls from your number and dials teammates by extension. - [Bring your own carrier](https://docs.crulon.ai/guides/bring-your-own-carrier.md): Connect the phone line you already pay for, a SIP trunk or your own phone system, and use its numbers in Crulon for calls. - **AI agents** - [Set up your AI agent](https://docs.crulon.ai/guides/ai-agents.md): Create an AI agent, find your way around the builder, put it on your phone line, test it, and publish your changes. - [Write your agent’s instructions](https://docs.crulon.ai/guides/agent-instructions.md): What to put in Role, Tone, Always, Never and Additional context, how they become the agent’s instructions, and what Crulon tells the agent on every call. - [Every agent setting](https://docs.crulon.ai/guides/agent-settings.md): Each section of the agent builder, every field in it, and what it changes on a call: defaults, limits and examples. - [Classic and Live engines](https://docs.crulon.ai/guides/classic-and-live.md): How the two engines run a call, which settings each one uses, and how to choose between them. - [Give your agent knowledge](https://docs.crulon.ai/guides/knowledge.md): Upload your own documents, such as price lists, policies and FAQs, so the AI agent answers callers from them. - [Give your agent Tools](https://docs.crulon.ai/guides/tools.md): Let the AI agent look up customers, open tickets and do other work while the caller is on the line: start from a template or build your own, then attach it to the agent. - [Hand calls to your team](https://docs.crulon.ai/guides/handoff.md): Let the AI agent pass callers to your team, an outside number or a Call Flow, choose what happens if nobody answers, and transfer calls between teammates. - [Build an outbound agent](https://docs.crulon.ai/guides/outbound-agents.md): Set up the agent your outbound campaigns call with: who speaks first, the conversation guide, variables, what counts as success, voicemail and phone menus. - [Run outbound AI campaigns](https://docs.crulon.ai/guides/outbound-campaigns.md): Have an AI agent call the people on a list, such as for reminders, renewals and follow-ups, with calling hours, retries, opt-outs and a budget. - **Your team** - [Invite your team and set roles](https://docs.crulon.ai/guides/team.md): Add teammates, choose what each one can do, set which calls they see, and deactivate or remove people when they leave. - [Make and take calls](https://docs.crulon.ai/guides/calls.md): Answer, place and transfer calls in your browser: getting ready, the call bar, choosing the number you call from, extensions and emergency calls. - [Ring a second speaker](https://docs.crulon.ai/guides/secondary-ringer.md): Play your ringtone on a second speaker as well as your headset, so you hear calls when your headset is off. The call itself stays in your headset. - [Work calls and texts in Conversations](https://docs.crulon.ai/guides/conversations.md): Every call and text with a customer in one thread: reply from your business number, assign it to a teammate, review calls and mark it done. - [Contacts and tickets](https://docs.crulon.ai/guides/contacts-and-tickets.md): How Crulon recognises callers, keeps the people and companies you deal with, and tracks follow-up work as tickets and tasks. - [Listen in and take over calls](https://docs.crulon.ai/guides/live-calls.md): See every call on your lines as it happens, listen without being heard, and take over from the AI agent when a caller needs a person. - [Notifications](https://docs.crulon.ai/guides/notifications.md): What Crulon tells you about, where it shows, and how to choose what you get by email. - **Account** - [Workspace settings](https://docs.crulon.ai/guides/workspace-settings.md): Your workspace’s name, time zone, country and emergency address, who Crulon emails, and your own profile, calling defaults and password. - [Plans and billing](https://docs.crulon.ai/guides/billing.md): What each plan includes, how seats and AI minutes are billed, what credits pay for, and how to change plan, pay and keep your account in good standing. - [Activity and call reports](https://docs.crulon.ai/guides/activity-and-reports.md): See how many calls your workspace handles and how they end, and look back at what your Apps and AI agents did. - **Help** - [Troubleshooting](https://docs.crulon.ai/guides/troubleshooting.md): Find what’s wrong by what you see: signing in, calls that don’t ring, sound, the AI agent, texts, campaigns and billing, with a fix and the guide for each. - [Frequently asked questions](https://docs.crulon.ai/guides/faq.md): Short answers about Crulon: plans and pricing, phone numbers, the AI agent, your team, texting and your data. - [Glossary](https://docs.crulon.ai/guides/glossary.md): The words Crulon uses, from AI minutes to Workspace Admin, each in a line or two with a link to the guide. - Integrations: Apps, and connecting your own systems - [Integrations](https://docs.crulon.ai/integrations.md): Apps that connect Crulon to the systems your business runs on, and how to connect your own. - **Internet providers** - [Crulon for internet providers](https://docs.crulon.ai/integrations/internet-providers.md): The Telco Ops Bundle for ISPs, WISPs and fixed-broadband providers: the Apps that connect your billing system, customer equipment and outages to your AI agent. - **ISP billing systems** - [Sonar](https://docs.crulon.ai/integrations/sonar.md): Connect Sonar so the AI agent knows who’s calling, reads their balance live, takes a payment with the card on file and opens tickets in Sonar. - [Splynx](https://docs.crulon.ai/integrations/splynx.md): Connect Splynx so the AI agent knows who’s calling, reads their balance and open invoices live, and opens tickets in Splynx for your team. - [ViSP](https://docs.crulon.ai/integrations/visp.md): Connect ViSP so the AI agent knows who’s calling, reads their balance live, takes a payment with the card on file and opens tickets in ViSP. - **ISP equipment** - [How equipment Apps work](https://docs.crulon.ai/integrations/equipment.md): Connect your network controller so the AI agent can check a caller’s equipment and restart it, and your team can do the same from Crulon. - [UISP](https://docs.crulon.ai/integrations/uisp.md): Connect UISP so the AI agent can check a caller’s Ubiquiti equipment, read its signal and restart it. - [Cambium cnMaestro](https://docs.crulon.ai/integrations/cambium-cnmaestro.md): Connect cnMaestro so the AI agent can check a caller’s Cambium equipment and restart it. - [Nokia Corteca](https://docs.crulon.ai/integrations/nokia-corteca.md): Connect Nokia Corteca so the AI agent can check a caller’s Nokia equipment and restart it. - [TP-Link TAUC](https://docs.crulon.ai/integrations/tp-link-tauc.md): Connect TP-Link TAUC so the AI agent can check a caller’s TP-Link equipment, read its Wi-Fi details and restart it. - **ISP network** - [Outages](https://docs.crulon.ai/integrations/outages.md): Declare a network outage or planned maintenance once, and every outage-aware AI agent tells affected callers what’s happening and when service should be back. - Developers: Custom Actions today, and the public API, coming soon - [Developers](https://docs.crulon.ai/developers.md): Connect your own systems to the AI agent today, and build on the Crulon API when it’s released. - **Build** - [Custom Actions](https://docs.crulon.ai/developers/custom-actions.md): Let your AI agent call your own API in the middle of a call: one HTTPS request, signed with a credential you save in Crulon.