No matter how consistent the master distribution shelf performs, if there are {TAIL ~ problems} downstream in {HEAD ~ either the distribution paths}, subtending clocks or the common equipment clock cards, synchronization performance is compromised 
No matter how consistent the master distribution shelf performs , if there are { TAIL ~ problems } downstream in { HEAD ~ either the distribution paths } , subtending clocks or the common equipment clock cards , synchronization performance is compromised
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH