microprocessor for polling and communication with system 10 the rcm unit 17 includes a cpu controller 56 the rcm cpu controller 56 preforms several task preferably one of which is to also monitor components of the system 10 the cpu controller 56 will include connections to incoming and outgoing communications and the poe controller 60 monitored functions can include determining speed of communication whether an ip device is connected to the rcm unit 17 whether a cable is connected the length of the cable whether the cable is operable whether poe power is on how much current a connected device is using and other similar operational parameters and functions such information may be critical during system installation and during downtime situations also it can be used to monitor whether a system is changing in such a way that future failures could be detected before they occur the transmitter units 12 can also be used to detect where a fault occurred for example if a cable is cut the system 10 could inform an operator of the distance from the transmitter unit to the ip camera where the cut occurs an additional feature of the transmitter unit 12 is the fact that it communicates to the rcm unit 17 via an mdio port of the etherstretch u2122 transceiver 31 information on system status can be communicated via u201c next page u201d messaging of the etherstretch u2122 transceiver 31 referring now to fig4 an embodiment of the rcm receiver controller management unit 17 is illustrated the rcm unit 17 is located at the monitoring end of cctv system 10 the rcm unit 17 communicates with each transmitter unit 12 via coaxial cable runs.