A terminations (T-586A) solved my problem.
Background: "A" is the current protocol and B is the old protocol - I'm old and use B because it was never a problem before now. However, ethernet cables typically do not provide as much as power as is used in this application and when they do (POE), designers would consider negative EMI/EMF effects. I would imagine that the designed for standard is the modern standard (T-586A). If EMI/EMF was a consideration, then alternating termination protocols would not be successful (same protocol and both ends) because you could end up with twisted pairs carrying both data and power.
Just a guess, but thought I'd share my data.
Background: "A" is the current protocol and B is the old protocol - I'm old and use B because it was never a problem before now. However, ethernet cables typically do not provide as much as power as is used in this application and when they do (POE), designers would consider negative EMI/EMF effects. I would imagine that the designed for standard is the modern standard (T-586A). If EMI/EMF was a consideration, then alternating termination protocols would not be successful (same protocol and both ends) because you could end up with twisted pairs carrying both data and power.
Just a guess, but thought I'd share my data.