Creating a CallOrbit account
Sign up for CallOrbit in under two minutes, verify your email, and access the portal to start configuring your workspace, phone numbers, and calling features.
Read guideDocumentation & Guides
Everything you need to master CallOrbit
Guides, tutorials, and references to help you set up, configure, and optimize your business phone system. From first login to advanced integrations.
Browse by section or scroll through all articles. Each guide is written for real operational tasks — not generic theory.
- Getting Started — account creation, workspace setup, buying numbers, first call, device configuration
- VoIP Fundamentals — SIP, PBX, codecs, trunking, RTP, STIR/SHAKEN, E.164, DID numbers
- Technical Reference — SIP error codes, SIP trunking, number porting, regional VoIP guides
- Operations — numbers, voice, IVR routing, users and teams, billing
Getting Started
Setting up your CallOrbit workspace
Configure your CallOrbit workspace with the right team members, roles, teams, and portal settings so your organisation is ready to handle calls from day one.
Read guideBuying a phone number on CallOrbit
Browse available DID, toll-free, national, mobile, and UIFN numbers by country and area, select the right plan, and complete your order to start receiving calls.
Read guideMaking your first call on CallOrbit
Place your first outbound call using the CallOrbit webphone or a connected SIP device, verify audio is working, and confirm your number and routing are set up correctly.
Read guideBrowser phone setup for CallOrbit webphone
Configure the CallOrbit browser webphone so every team member can make and receive calls directly from their browser without installing any desktop software or hardware phone.
Read guideSIP setup on CallOrbit
Configure SIP trunks, SIP users, and SIP endpoints on CallOrbit so your existing desk phones, PBX systems, or softphones can register and place and receive calls through the platform.
Read guideSoftphone setup for CallOrbit
Install, configure, and connect a desktop softphone application to CallOrbit using SIP credentials so you can make and receive calls from your computer without opening a browser.
Read guideVoIP Fundamentals
What is VoIP? A complete guide to Voice over Internet Protocol
VoIP (Voice over Internet Protocol) converts voice into digital packets and transmits them over IP networks. Unlike traditional PSTN lines, VoIP calling uses your existing internet connection to make and receive calls with higher flexibility, lower cost, and no dedicated phone line hardware required.
Read guideHow SIP works: Session Initiation Protocol explained
SIP (Session Initiation Protocol) is the signalling protocol that sets up, manages, and tears down real-time communication sessions — voice calls, video calls, and messaging — over IP networks. SIP handles the negotiation between endpoints so media can flow after the session is established.
Read guideWhat is a PBX? Private Branch Exchange explained
A PBX (Private Branch Exchange) is a private telephone network that manages internal call routing between users within an organisation and connects external calls through trunk lines to the PSTN. Modern PBX systems can be on-premise hardware or cloud-hosted software.
Read guideSIP trunking explained: how SIP trunks replace traditional phone lines
SIP trunking replaces traditional analogue phone lines or PRI circuits with virtual connections over the internet. A SIP trunk carries multiple concurrent voice channels through a single IP connection to your PBX or phone system, eliminating per-line hardware costs.
Read guideRTP explained: Real-time Transport Protocol for VoIP calls
RTP (Real-time Transport Protocol) carries the actual voice audio between VoIP endpoints after SIP establishes the session. RTP packets contain digitised voice samples encoded with a codec and include sequence numbers and timestamps that allow the receiver to reconstruct audio in the correct order.
Read guideSTIR/SHAKEN explained: caller ID authentication for VoIP calls
STIR/SHAKEN is a framework of protocols that authenticate caller ID information for calls carried over IP networks. STIR (Secure Telephone Identity Revisited) and SHAKEN (Signature-based Handling of Asserted Information Using toKENs) work together to verify that the caller ID displayed on inbound calls has not been spoofed.
Read guideE.164 phone numbers: the international numbering standard explained
E.164 is the international numbering standard maintained by the ITU that defines the format and structure of telephone numbers worldwide. Every public telephone number in the world follows E.164, and VoIP systems require numbers in this format for proper routing between carriers.
Read guideVoIP codec guide: G.711, Opus, and G.729 explained
A VoIP codec (coder-decoder) converts analogue voice into a digital bitstream for transmission over IP networks and decodes incoming streams back into audio. The codec choice directly affects call quality, bandwidth usage, and CPU load on endpoints and PBX servers.
Read guideDID numbers explained: Direct Inward Dialling for business phone systems
A DID (Direct Inward Dialling) number is a virtual phone number that routes directly to a specific extension, user, or IVR destination within a PBX or VoIP system without requiring a live operator to transfer the call. DIDs decouple the phone number from the physical phone line.
Read guideHosted PBX vs cloud PBX: what is the difference?
Hosted PBX and cloud PBX are often used interchangeably, but they describe different deployment architectures. Hosted PBX means the provider manages the PBX infrastructure in their data centre and you connect via SIP. Cloud PBX is a specific type of hosted PBX built on multi-tenant cloud infrastructure with shared resources.
Read guideTechnical Reference
Creating an Account
Learn how to create your CallOrbit account in minutes. Step-by-step guide to sign up, verify your email, and get started with your business phone system.
Read articleSetting Up Your Workspace
Configure your CallOrbit workspace for optimal performance. Learn about workspace settings, team management, and initial configuration best practices.
Read articleBuying a Phone Number
Purchase virtual phone numbers for your business. Guide to buying local, toll-free, and international numbers with CallOrbit.
Read articleMaking Your First Call
Make your first call with CallOrbit. Learn how to use the webphone, mobile app, or desk phone to start making and receiving business calls.
Read articleBrowser Phone Setup
Set up and use the CallOrbit browser phone. Make and receive calls directly from your web browser without any additional software.
Read articleSIP Setup
Configure SIP devices and softphones with CallOrbit. Complete guide to SIP trunk setup, SIP credentials, and device configuration.
Read articleSoftphone Setup
Install and configure softphone applications for CallOrbit. Guide to setting up mobile and desktop softphone apps.
Read articleSIP 486 Busy Here: Understanding and Troubleshooting
What does SIP 486 Busy Here mean? Learn about this SIP response code, common causes, and how to troubleshoot busy signal issues in VoIP.
Read articleWhat Is SIP Trunking? Complete Business Guide
Learn what SIP trunking is, how it works, how it differs from traditional phone lines, and whether it's right for your business communication needs.
Read articleHow to Port a Phone Number: Complete Guide
Step-by-step guide to porting your phone number to CallOrbit. Learn about the porting process, timeline, requirements, and how to avoid common mistakes.
Read articleVoIP South Africa: Complete Business Guide
Everything about VoIP in South Africa - regulations, providers, costs, and how businesses can benefit from VoIP solutions in the South African market.
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