3CX platform
Users, extensions, queues, IVR, apps and administration in one managed communications platform.
CLOUD BUSINESS VOICE
A phone system built around users, numbers and customer calls.
39T plans and supports 3CX phone systems, Yealink devices, SIP trunks, call flows, UK business numbers and number porting.
ONE MANAGED VOICE SERVICE
Platform, devices, trunks and numbers.
A reliable business phone service depends on every layer being documented and supported.
Yealink devices
Desk, DECT and meeting-room hardware selected for the user and working environment.
SIP trunks
Inbound and outbound capacity, routing, fraud controls and compatible number services.
Number porting
Validated records and a controlled plan for retaining existing business telephone numbers.
Hybrid working
Approved desktop, web and mobile clients designed around security and support policy.
Ongoing changes
User moves, call-flow changes, licensing, updates and support under a managed service.
CONTROL THE MIGRATION
The number inventory is the project foundation.
Old PBXs often contain years of undocumented routing. Discovery reduces the risk of losing important call behaviour.
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Number register
Document every main number, DDI range, owner, current route and provider record.
Document every main number, DDI range, owner, current route and provider record.
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Call-flow design
Rebuild opening hours, IVR, queues, diversions and escalation paths.
Rebuild opening hours, IVR, queues, diversions and escalation paths.
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Network readiness
Review internet, VLANs, DHCP, PoE, Wi-Fi and quality for IP voice.
Review internet, VLANs, DHCP, PoE, Wi-Fi and quality for IP voice.
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Cutover plan
Stage devices, train users, test calls and agree support and rollback actions.
Stage devices, train users, test calls and agree support and rollback actions.
UKDDI NUMBER PORTAL
Search for available UK business numbers.
UKDDI provides searchable number inventory and guided number-service choices. Existing-number porting remains subject to provider validation.
Open UKDDI number searchDELIVERY PROCESS
From old PBX to managed cloud voice.
Porting should happen only after the new platform, routes, users and devices are ready.
Audit
Record users, numbers, devices, analogue dependencies and call behaviour.
Build
Configure the platform, SIP trunks, routing, security and reporting.
Test
Stage devices, run test calls and train administrators and users.
Port
Complete the accepted porting window with support and continuity actions.
COMMON QUESTIONS
Before you order.
Can we keep our existing telephone numbers?
Often yes, subject to the current provider, number type, account records, installation address and an accepted porting order.
Can staff use the system away from the office?
A suitable 3CX design can support approved desktop, web and mobile clients, subject to licensing, security and company policy.
Will calls work if the office internet fails?
Options may include mobile apps, inbound diversion, secondary connectivity and alternative routing. The design depends on the continuity requirement.
Does 39T supply phones and SIP trunks?
Yes. 39T can coordinate the platform, compatible Yealink devices, SIP or VoIP trunks, number porting, configuration and support.