One optical fiber transmits video, voice and serial port data at the same time, which is the value of multi-service multiplexing optical transceiver. To make it stable, you must first calculate the bandwidth, divide the channels, and then leave a margin for reverse data. This article gives a three-step design method for bandwidth, channels, and selection.
First estimate the bandwidth based on the business
Uncompressed video has the highest usage, while audio, serial port and phone usage are relatively low. When using hybrid networking, you should add them up one by one and reserve about 30% of the margin. When bandwidth is tight, real-time services should be given priority. The number of voice channels can be referred to8-way telephone + 1-way Internet phone optical transceiver, the collection and control data are carried in independent channels, and do not be squeezed into the same time slot as the video. If services are to be added later, a spare channel should be reserved instead of filling up the time slots all at once.
Channel allocation should be clear
- Video and audio use high-bandwidth channels, and control RS485 occupies a separate channel.
- Reverse data is used for PTZ and control return, such as8-channel video + 1-channel reverse 485 data video optical transceiver
- The Ethernet channel carries the network management and host computer and does not compete with voice for time slots.
Choose a model based on the scenario
For security monitoring return transmission, please refer toSecurity video surveillance fiber optic transmission solution, using video plus reverse 485 in one step; dispatching voice-intensive scenarios mainly uses telephone optical transceivers. Before choosing a model, make a list of locations and services. Make sure the number of channels, distances, and formats are all aligned before deciding on a plan to avoid adding services temporarily. When the bandwidth is really insufficient, priority is given to moving non-real-time data and network management to Ethernet or downgrading video. Real-time control and voice must be ranked first.
The biggest fear of multi-service multiplexing is that the bandwidth will be exceeded when building and adding at the same time. The correct order is to make a list first and then select the model; send the list to Wolflight, and the corresponding model can be quickly allocated according to the channel combination.