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The things we explain most often during quotation and delivery, written down: how to choose a circuit, what to check in a migration, how early to plan a move. No form wall.
Selection guideChecklistsTechnical notesGlossary
Choosing an enterprise circuit: DIA, broadband or leased line6 min read · Includes a decision checklist
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Business email migration checklist: 20 checks before and after5 min read · Printable
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Office relocation IT checklist: starting at T-10 weeks5 min read · Work backwards
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Glossary: DIA, SLA, MPLS, SD-WAN, DMARC and more3 min read · For non-technical colleagues
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1. Choosing an enterprise circuit
The usual mistake is using price or a headline bandwidth number as the only criterion. The right order is purpose → symmetry and exclusivity → bandwidth and price.
Four questions first
- Will this line serve external users? If yes (website, mail, VPN), you need fixed IPs and higher stability — consider DIA.
- Is your traffic symmetric? Heavy upload (backup, video, camera feeds) will bottleneck on shared broadband.
- What does an hour of downtime cost? If it is unacceptable, you need resilience design, not merely a more expensive line.
- Who follows up? If nobody does, fix that before buying a premium circuit.
| Your situation | Suggested direction | Avoid |
|---|---|---|
| Under 10 staff, email and browsing | Business broadband plus 4G backup | DIA is unnecessary |
| Public website or VPN access | DIA with fixed IPs | Dynamic-IP broadband |
| Multiple branches needing interconnect | Point-to-point or SD-WAN | Stacking broadband VPNs |
| A single line that keeps failing | Find the cause and physical path first | Simply upgrading the same line |
| Cross-border operations | Cross-border circuit or SD-WAN plus local internet | Assuming cross-border costs the same as local |
The most common misconception: comparing a 1000M broadband service with a 100M dedicated line and concluding the dedicated line is overpriced. The bandwidth nature (shared vs exclusive), symmetry, SLA and equipment responsibility are all different — headline numbers are not comparable.
2. Business email migration checklist
Before cutover
- Account count, mailbox sizes, shared mailboxes, aliases and distribution groups counted
- DNS control confirmed (or ownership established)
- New platform accounts created with a consistent naming convention
- SPF, DKIM and DMARC configured and validated
- Cutover window chosen (low traffic, people available)
- All staff notified of timing and required actions
- Mobile and desktop setup guides prepared
- Parallel running period and rollback plan agreed in writing
Within 24 hours after
- External and internal send/receive tested with attachments
- Mobile and desktop each tested
- Junk folder checked for false positives
- Signatures, auto-replies and shared mailbox permissions confirmed
- Aliases and groups still delivering
- SPF / DKIM / DMARC results checked
- Calendar and contacts synchronised
- Issues logged with a named owner
3. Office relocation IT checklist
| When | Task | Why it cannot wait |
|---|---|---|
| T-10 weeks | Confirm new site, check coverage, place order | Circuits and installation are the longest lead items |
| T-8 weeks | Site survey, server room and cabling plan | Changes after fit-out begins cost multiples |
| T-6 weeks | Equipment list and purchase, cabling tender | Delivery and installation must overlap |
| T-4 weeks | Network and telephony design signed off, access control and CCTV | Involves multiple contractors |
| T-2 weeks | Pre-configure and label equipment, pack | Move day should be transport and patching only |
| T-1 week | Old site handover, circuit termination, data disposal | Avoid extra months of billing and data exposure |
| Move day | Switch over zone by zone, test each | A single big-bang cutover is the riskiest option |
| T+1 week | Acceptance, snagging, old equipment disposal | Most issues surface on day two |
4. Glossary
| Term | Plain explanation |
|---|---|
| DIA | Dedicated Internet Access — exclusive, symmetric internet access with a contractual SLA. |
| SLA | Service Level Agreement — availability, response and restoration commitments. |
| MPLS | A traditional enterprise private network technology: stable but costly and slow to provision. |
| SD-WAN | Software-defined aggregation of multiple links with per-application routing and central management. |
| CPE | Customer Premises Equipment — the network device located at your site. |
| Last mile | The segment between the building and the carrier network. |
| SPF / DKIM / DMARC | Three email authentication mechanisms that prove sender identity and reduce impersonation. |
| MFA | Multi-factor authentication — a second proof at sign-in, such as a code on your phone. |
| EDR | Endpoint detection and response — detects behaviour that traditional antivirus misses. |
| RTO / RPO | Recovery time objective / recovery point objective — the two measures of backup and resilience. |
Need a formatted copy? These guides can be provided as PDF or Word for internal circulation or bid documents. Tell us which items you need through project enquiry.
Have a project in hand? Start with the requirements.
Tell us the purpose, location and timing. We will come back with what is feasible, what it depends on, and an indicative price range.