Guides — VoIP, Cloud PBX & IoT Connectivity Explained | Barbary Systems
RESOURCES / GUIDES

No jargon.
No sales pitch.

Eight guides that answer the questions people actually type into search engines. Full articles are being finalised — email us and we'll send any of them today.

G/01 · 12 MIN READ
The PSTN switch-off, explained for people with actual jobs
What's being turned off, when, what breaks, and the sane migration order. The one guide to read this year.
G/02 · 9 MIN READ
What is a cloud phone system? A plain-English guide to VoIP & hosted PBX
How calls travel over the internet, what "hosted" really means, and what changes day-to-day for your team.
G/03 · 7 MIN READ
Number porting: how to move your business number without losing calls
PACs, lead times, parallel running and the mistakes that leave phones silent for a day. Avoidable, all of them.
G/04 · 8 MIN READ
How much bandwidth does VoIP actually need?
Per-call maths, codecs, QoS settings and how to test your line before committing — with worked examples.
G/05 · 10 MIN READ
IoT SIMs for beginners: how to connect your first hundred devices
Form factors, data sizing, steered vs unsteered roaming, private APNs — the vocabulary and the decisions in order.
G/06 · 6 MIN READ
Call recording and UK law: what you must, may and mustn't do
GDPR, FCA rules, notification requirements and retention — the compliance picture in plain English.
G/07 · 8 MIN READ
Choosing a business phone provider: 12 questions to ask before you sign
Contract terms, SLAs, porting fees, support hours — the questions that separate good providers from good salespeople.
G/08 · 7 MIN READ
5G for business: what it changes (and what it doesn't)
Where 5G genuinely matters for failover, IoT and mobile working — and where 4G remains the right answer in 2026.
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Full guides are being finalised for the site — we'll email you any of them today.
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