i have two CAT7 SFTP cable (around 40m long) and two problems. First Cable (12):
Router | v 1gbps switch --> cat8.1 patch cable --> cat6A keystone jack --> ~40m cat7 SFTP cable --> cat6A keystone jack --> cat8.2 patch cable --> wifi6 AP
Switch says: cable is OK – Estimated cable length is 27.00 – 51.00 m
Bandwidth: 100mbps HDX --> ~80 mbps down / ~90 mbps up / ping ~7ms 100mbps FDX --> ~20 mbps down / ~20 mbps up / ping ~10ms (connected, a lot of drops and errors like 1000 errors per min on 80mbps) 1gbps FDX --> ~ 0 mbps down / ~0 mbps up / ping ~9999ms (no connection, no drops, no errors)
I checked the cable today with a HT Quicklan 6055 and connections a OK.
Two days ago i had an old POE+ AP running on 1gbps (3W, no drops, no errors) on this connection / cable. I changed it to the new wifi6 AP first with POE+ ~7W and it didn’t want to connect with 1gbps. I changed back to the old AP and it didn’t work on 1gbps since then.
I will change the cable to Cat 8.1 SFTP and the keystone jacks to cat8 ones. I wired the cable every time
according to 568 A.
Its a duplex cable, the other one is connected with my computer (same connector types) and it works with 1gbps. The AP connected directly to the switch with one short Cat7 cable delivers 350mbps with no problem.
Could it be an twisted pair wiring problem?
And is there a difference in bandwidth between POE+ (on / off) on this cable length?
Is it recommended to keep POE+ off and use a power adapter where possible?
I am grateful for any ideas!
For my second cable (13):
Same setup as mentioned above, except for the end. There is a adaptor like this one. I checked the cable with the HT Quicklan 6055 and the cable is OK. But switch says:
cable is not OK Failure is located approximately 7.00 - 28.00 m from the switch. Pair A Pair B Pair C Pair D Length 7.00 - 27.00 m 8.00 - 28.00 m 7.00 - 27.00 m 8.00 - 28.00 m State ✗ ✗ ✗ ✗
Same wire was running with passiv poe for two years. Changed to new AP with 1gbps POE+, a new connector (as linked) at the end of Cat7 SFTP and the leds on the switch remains off.
What could be the reason that the cable are connected properly but the switch sees an error on every cable?