This 16-bit counter tracks framing errors detected on this port since the last reset, indicating the receiver lost synchronization with the expected frame boundaries in the incoming bitstream. A climbing framing-error count alongside stable CRC and parity counts on the same port points an admin toward a clocking or synchronization mismatch with the attached device rather than pure line noise. For example, framing errors appearing right after a change to a port's baud rate setting would suggest a clock-rate mismatch with whatever is connected to that port.