Migrating 100+ Users to a Cloud Phone System in Singapore

Why This Is a Different Project at 100+ Seats

Switching phone systems for a five-person team is close to a same-day task. At 100 or 200 seats, it's genuinely a different kind of project — more numbers to port, more extensions and call flows to configure, more departments each with their own routing needs, and a much higher cost if something goes wrong on day one. Dromlik, a cloud phone system for Singapore businesses, approaches migrations at this scale as a structured project with a plan, not a single flip-the-switch event.

The Three Risks That Actually Matter

• Downtime during the switch. A team of 100+ people relying on phones for sales, support, or operations can't afford a gap where calls simply don't connect.

• Numbers not porting cleanly. With dozens of numbers across departments, a botched port can mean some lines working and others silently failing — often not discovered until a customer complains.

• Staff not knowing how to use the new system. A technically perfect migration still fails if 100 people don't know how to transfer a call or set up voicemail on day one.

A properly run migration is built specifically to manage these three things, not just to get the technical configuration right.

What a Structured Migration Actually Looks Like

1. Discovery and Planning

Before anything moves, this stage maps out current numbers and carriers, department structure and call flows, existing extensions and who they belong to, and any integrations that need to carry over — CRM, helpdesk, or reservation platforms. This is also where a realistic timeline gets set, rather than an optimistic one that falls apart mid-migration.

2. Bulk Provisioning

Rather than setting up users one at a time, accounts, extensions, and call flows get bulk-imported and configured in the new system before anyone's asked to switch over — so the new system exists fully configured and ready, in parallel with the old one still running.

3. Number Porting, Staged

Numbers can be ported in planned batches rather than all at once — a department or location at a time — so if any single port needs troubleshooting, it doesn't take the whole company's phones down while it's resolved.

4. Parallel Running

For a period before full cutover, the new system can run alongside the old one, letting staff get familiar with it and letting the team catch and fix issues before it's the only system in use — rather than discovering problems for the first time on a live customer call.

5. Staff Training

A brief, practical training session — covering the essentials like answering, transferring, voicemail, and using the AI receptionist or contact centre features that matter to that team — makes the difference between a smooth transition and a flood of confused support calls on day one.

6. Go-Live and Hypercare

On cutover, having a dedicated point of contact for the first few days — not a general support queue — means issues get caught and fixed quickly, before they compound into bigger problems.

What to Ask Any Provider Before Migrating at This Scale

• Do they run migrations as a staged project, or expect a single cutover for the whole company?

• How do they handle porting for a large number of lines across multiple departments?

• Is there a dedicated point of contact during migration, or a general support queue?

• What happens if a specific number fails to port on schedule — is there a fallback?

• Is staff training included, or left entirely to internal IT to figure out?

Getting Started

A migration at 100+ seats is a real project, but it doesn't need to be a risky one — the difference is almost entirely in whether it's planned as a staged process or attempted as a single cutover. If you're weighing a move at this scale, we're happy to walk through what a realistic timeline and process would look like for your team specifically.