ADC H2TU-C-231 OCT55 T, AMI L, OCT55 TEST PATTERN WITH AMI LINE CODE, Remote LOS and AIS Response

Testing LTPH-UM-1109-01, Issue 1

Remote LOS and AIS Response

Figure 26 shows the different ways the H2TU-R can respond to the network, depending on the configuration of the NLBP, TLOS, RDA, and ALMP configuration options described in Table 5 on page 17 and Table 6 on page 18.

H2TU-R, DS1 Input

AIS to CPE

AIS

LOS event?	YES	LOS to CPE
	NLBP
		LOS
NO	ENA	Loopback to Network
	TLOS
	DIS
	DIS	Pass on LOS to
	RDA	Network, no alarm
		report

ENA

Remove alarm	NO	AIS event?	YES
pattern

ADC Option	LOS	Pass on LOS to
	ALMP	Network
HDSL2 Standard Option	AIS
Default configurations are in bold.
		AIS to Network

Figure 26. H2TU-R LOS and AIS Response Priorities

OCT55 TEST PATTERN WITH AMI LINE CODE

The OCT55 test pattern can be used in unframed mode to stress the system and verify data integrity. In an SF or ESF framing mode, excessive zero anomalies may occur which cause the H2TU-C to report ES, SES, and UAS errors according to ANSI T1.231-1997.

42 January 9, 2002 H2TU-C-231 List 2