HP BER 718 37718A manual Using Receive Overhead Monitor

Selecting Test Features

Using Receive Overhead Monitor

	Using Receive Overhead Monitor
Description	When first connecting to a SONET network, a start up confidence check
	can be made by viewing the behavior of all the overhead bytes. If the
	SONET network shows alarm indications, some diagnosis of the problem
	may be gained from viewing all the overhead bytes.The OVERHEAD
	MONITOR display is updated once per second (once per 8000 frames)
	approximately.
TIP:	A snapshot of the received overhead can be logged to the chosen logging
	device. See "Logging on Demand " page 110.

HOW TO:	1	Set up the receive SONET interface and payload as required. See
		“Setting SONET Receive Interface” page 17.
	2	Choose the type of overhead to MONITOR.
	3	If		(Transport Overhead) is chosen, choose the STS-3 # and
			TOH
		STS-1#		to be displayed.
		Many bytes in STS-1# 2 and STS-1#3are unlabeled because the other
		overhead functions have not yet been defined.
		If STS-1# 1,2,3 is chosen, the hexadecimal value of all 81 bytes of
		section overhead is displayed (all 324 bytes of an OC-12 or 1,296 bytes
		of an OC-48 are displayed 81 bytes at a time by selecting each STS-3
		in turn).The value of the bytes can be set using DECREASE DIGIT
		INCREASE DIGIT			.

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