Tunnel emergency phone and video data co-cable fiber splitting network

Tunnel emergency telephone optical transceiver and video data co-cable fiber splitting network

Published: 2026-03-05 EB-LINK Views: 1296 Emergency phone, telephone optical transceiver, co-cable fiber splitter, dispatch voice, tunnel communication

Emergency telephones in highway tunnels are the bottom line safety equipment. There is one every tens to hundreds of meters inside the tunnel. Calls must be returned to the monitoring center and fire dispatching station reliably. It runs on the same optical cable as the camera images and detection data, but they must be carried separately and cannot be mixed together.

Telephone, video, and data are each grouped into one core

It is recommended that the voice link be independently paired with fiber cores, using8-way telephone + 1-way Internet phone optical transceiverBring together multiple telephones at the entrance and inside the cave, and centrally connect to the dispatching host; images are taken separately8-channel video + 1-channel reverse 485 data video optical transceiver; Detection and power distribution data are grouped separately. Three types of services are divided into fibers, and any link maintenance or failure will not affect the other two types.

Power supply and grounding should be considered separately according to business

Emergency calls are usually on standby, and when the alarm sounds, the terminal power supply must be stable. Centralized communication power supply is more reliable than local adapters.
Grounding and surge protection are provided between the telephone host and the dispatching station. The lightning strike induction at the cave entrance first impacts the voice line.
The fiber core registers the fiber sequence and wavelength according to the business. During handover and troubleshooting, you can tell at a glance which group is for voice and which group is for image.

Numbering and ledger determine response speed

Each emergency phone has a station number, and the optical transceiver port has a number, and the corresponding relationship between the two is written in the ledger. When an alarm actually occurs, the on-duty personnel can quickly find the port and fiber core from the alarm station number. When dispatching an order, there is no need to search for lines in the tunnel, and the entire voice segment will not be stopped because a breakpoint cannot be found. Wolflight also followed this idea in the tunnel communication transformation to support the number point table and cooperate withOptical fiber project for vehicle monitoring system in highway tunnel in a provinceThe fiber splitting method has been implemented. Only by clearly distinguishing the three groups of fiber cores and matching their numbers can the bottom line of voice be maintained.