Guides
Practical guides for useful work
These guides walk through the work our tools help you do: creating a branded invoice, quote or estimate, interpreting a diagnostic result and collecting evidence for a support request.
Start with the question you need to answer
- Billing for your work? Follow the invoice walkthrough from business setup to a finished PDF.
- Proposing new work? Prepare a quote or estimate with scope, validity dates and terms.
- Unexpected numbers? The speed-test guide explains Port233’s thresholds and measurement limits.
- Unexpected provider or location? The public-IP guide walks through VPN, router, and shared-address comparisons.
- An unreliable connection? The slow-internet guide includes a decision table and a free worksheet for support.
Published by Port233 LTD. Worked examples are illustrative; provider and protocol references are linked within each guide.
How to create a branded quote or estimate PDF
Use Quote Studio to prepare a proposal: choose Quote or Estimate, add scope, pricing, validity and terms, then download a PDF. Includes a worked example and settings guidance.
How to create a branded PDF invoice with Port233
A practical Invoice Studio walkthrough: add your business details, choose a currency, enter line items, review totals, download a PDF and reuse your settings.
How to interpret an internet speed test
Learn what download, upload, latency, and jitter results mean when diagnosing a home or small-office internet connection.
What your public IP address says about your connection
Understand public IP addresses, ISP metadata, ASN details, VPN effects, and why approximate location may differ from your real location.
A practical checklist for slow or unstable internet
A step-by-step network troubleshooting checklist for separating broadband faults from Wi-Fi, device, router, and background traffic issues.