New DDI numbers for 3CX
Select new UK business numbers from available UKDDI inventory and route them through a suitable SIP trunk to the 3CX environment.
3CX BUSINESS PHONE SYSTEMS
3CX Phone Systems for UK Businesses
3CX can provide the call-control layer for a modern business phone system, while UKDDI supplies and delivers UK business numbers through compatible SIP services. The result is a flexible way to connect geographic, national and other supported numbers to extensions and call flows.
QUICK ANSWER
What you need to know
A 3CX phone system is an IP-based business communications platform that can receive and place calls through compatible SIP trunks. UKDDI can provide business numbers and SIP delivery for suitable 3CX deployments, subject to correct trunk, routing, firewall and number-format configuration.
CHOOSING THE RIGHT OPTION
Connect UK business numbers to 3CX using SIP
The number range and the 3CX platform are separate parts of the solution. SIP provides the connection between the external telephone network and the PBX.
Port existing numbers to a 3CX project
Where eligible, existing numbers can be considered for porting so customers can keep the public number during a platform migration.
Map numbers to extensions and call flows
Configure inbound DIDs/DDIs in 3CX so each number reaches the intended user, queue, group or automated call flow.
HOW IT WORKS
3CX SIP trunk configuration that needs planning
A reliable deployment depends on consistent number formats and a network configuration that supports the SIP design without unnecessary exposure.
Number presentation and inbound formats
Agree the expected number format for inbound routing and outbound caller ID so 3CX rules match what the trunk presents.
Firewall, NAT and network security
Configure the network deliberately for the selected 3CX and SIP architecture. Do not broadly open services or disable security controls simply to solve a voice-routing issue.
Capacity and concurrent calls
Size the SIP service around expected simultaneous inbound and outbound calls rather than just the total number of DDIs.
BUSINESS BENEFITS
Use 3CX for multi-user business calling
A PBX is most valuable when the business needs more than a single forwarded number.
Extensions and departments
Give teams their own extensions and route dedicated numbers to departments or individuals.
Queues and structured call handling
Design inbound calls around the way sales, support and customer-service teams actually work.
Remote and multi-site users
A correctly designed 3CX environment can support users in more than one location while keeping central numbering and call-control policies.
Need UK numbers for a 3CX phone system?
Choose new numbers from live inventory or speak to UKDDI about porting existing numbers and SIP delivery.
RELATED UKDDI SERVICES
Continue planning your business phone service
COMMON QUESTIONS
Frequently asked questions
Can I use UKDDI numbers with 3CX?
UKDDI numbers can be delivered to a compatible 3CX environment using an appropriate SIP service and configuration.
Can I port my existing phone numbers to 3CX?
3CX itself is the PBX platform. Existing numbers may be ported to the communications provider serving the 3CX deployment where the number and current service are eligible.
How many SIP channels do I need for 3CX?
That depends on the number of simultaneous external calls you expect rather than the total number of extensions or DDIs. Capacity should be sized to your usage and continuity requirements.
Does UKDDI manage my 3CX server?
The UKDDI service shown here focuses on business numbers and compatible voice delivery. Any wider 3CX implementation, hosting or management requirement should be confirmed as part of the project scope rather than assumed from the number service alone.
NEXT STEP
Search UK numbers
Need UK numbers for a 3CX phone system?
Choose new numbers from live inventory or speak to UKDDI about porting existing numbers and SIP delivery.