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