The invention may be used in many different types of {HEAD ~ applications} including {TAIL ~ communication interface devices} that convert DS3 to STS 1, and STS 1 to DS3 
including
The invention may be used in many different types of { HEAD ~ applications } including { TAIL ~ communication interface devices } that convert DS3 to STS 1 , and STS 1 to DS3
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH