These LCC connectors are part of ADC's ProPatch Miniature (PPM) Series Super High-Density Coax (SHDC) patching system. Designed
for High Definition (HD), SDI, AES audio, 5.1 and 7.1 audio applications where coax is preferred but space is at a premium. ADC's patented
3 piece LCC connectors terminate like a BNC and use standard tooling. The 1.0 / 2.3 connector (not from ADC) is a 1 piece connector
that also terminates like a BNC.