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In the meantime jmcsecure sent me an email and they tell me to use this scheme (white orange+ orange,white green+blue,white blue+green,white brown+brown) and it works

Thanks for the reply I'm wondering when i use 15m cable (home made,i fitting the plugs) why it works I checked the 40m cable with a lan tester and it is good

yes,home made First time i used cat5e and it did not work.Yesterday i bought Digitus cat7 (Products )and stil not work with 40m cable,with 15m cable works. The surveillance kit it was bought from jmcsecure.co.uk but i have no support from them

when i connect the camera with 40m cable the NVR detects camera but i don't receive imagine. At status i have this message Detecting.I attach a picture

Hello I have a big problem with this system NVR-208M-A/8P,Mini bullet: IPC-B140 I can't make the system work with a 40m cable.With 15-20m cable the system works but with 40m not working.I use cat 7 cable (Products )What can i do?All surveillance cameras are located at 40-60m distance from NVR