We have using a patch panel black box JPM2194A, with 8 FXS + 4 BRI (EVM-HD-8FXS/DID with EM-4BRI-NT/TE)
The 8 FXS is workss fine.
But the 4 BRI......NO.
All BRI ports with Polycom connected with appropriate cable are down, down(not connected).
Is there any jumping on BlackBox?