https://www.systerra.de/VPort_461A.html
The VPort 461A is a 1-channel Industrial Video Encoder with H.264 video compression algorithm, which can provide best video quality in the market now, but less bandwidth requirement than other video compression standards ...
https://www.systerra.de/VPort_464.html
The VPort 464 4-channel industrial video encoder uses the H.264 video compression algorithm to provide the best video quality on the market, but with a smaller bandwidth requirement than other video compression standards...
VPort 461A Datasheet (PDF)
https://www.systerra.de/downloads.php?dokument=5292
VPort 464 Datasheet (PDF)
https://www.systerra.de/downloads.php?dokument=8880