Acceptance of tunnel communications should be based on two-way tests along defined maintenance and operational routes, rather than a connection at the entrance.
Which sector need should be addressed?
Access inside tunnels, technical rooms and between separate bores differs from surface sites. Define in advance who switches to which alternative communication method during infrastructure outages.
System and task plan
A coverage project compatible with existing operating systems and safety procedures is prepared. Required antenna or propagation solutions are selected through specialist design; a handheld's catalogue range is not considered a project guarantee.
Points to check during field testing
- Two-way calls at defined tunnel test points.
- Access between technical rooms and the command centre.
- Audio tests with protective equipment used during maintenance.
- Infrastructure outage drill.
Example workflow
During an example acceptance tour, the team calls from authorized test points using location codes. The command centre repeats the brief message; missed or misunderstood calls are retained as separate defect records.
Planning example; not a completed customer project or measured result.
Frequently asked questions
Is the signal level indicator sufficient for acceptance?
No. Message intelligibility, two-way access and operation of the operational scenario must also be measured.
What information should be prepared before requesting a quotation?
For road tunnels, share the layout or route plan, users per shift, communicating teams, critical work points and existing infrastructure. Expected functions and delivery scope should be documented separately.
Assess a solution suited to your business
Base selection on workflows and a field acceptance plan rather than one model or catalogue range. DMR radio options and compatible accessories can be explored, and to clarify project scope, you can contact OEC.