A SIP Trunk connects a 3CX PBX with a telecommunications provider. It allows businesses to handle inbound and outbound calls and use business phone numbers through the IP-based phone system.
How does SIP Trunk work with 3CX?
The 3CX PBX manages internal communications and call routing, while the SIP Trunk provides the connection to the telecommunications network.
Configuration may include authentication details, phone numbers, call routing rules and the technical requirements of the provider.
How many SIP channels does a business need?
The number of SIP channels should reflect the expected number of simultaneous calls. A company with 50 employees does not necessarily need 50 simultaneous channels.
It is better to analyze actual call traffic, particularly during periods of peak activity.

Phone numbers and call quality
When choosing a SIP Trunk, businesses should consider available phone numbers, number porting options and factors affecting call quality.
The company's network infrastructure and configuration are also important for reliable VoIP communication.
PLFON SIP Trunk for 3CX
PLFON provides SIP Trunk and business numbering services. These services can be used as part of a telecommunications infrastructure based on 3CX.
Before implementation, it is worth confirming the technical requirements, expected number of simultaneous calls and required phone numbers.