Hello,
The TRIDVR-ELE4ME can accept up to 2 IP channels:
https://www.securitycameraking.....ELE4ME.pdf
The IPOB-EL4IREW likely would need its resolution lowered to 2MP / 1080p to be accepted by your DVR as the DVR supports IP cameras up to 1080p / 2MP resolution.
Please let us know if we can be of further assistance