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Testing LTPH-UM-1049-02, Issue 2
54 January 9, 2002 H2TU-C-319 List 4E
Remote LOS and AIS Response
Figure 30 shows the differing ways the H2TU-R can respond to the network, depending on the configuration of
the TLOS, NLBP, FT1, ALMP, and NAIS configuration options described in Table 5 on page 18 and Table 6 on
page 19. See Table 13 on page 27 for the response of the H2TU-C and H2TU-R to LOS and AIS alarm conditions.
Figure 30. 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 causes the H2TU-C to report ES, SES, and UAS
errors according to ANSI T1.231-1997.
LOS event?
AIS event?
Remove alarm
pattern
TLOS
NLBP
FT1
ALMP
NAIS
[DIS]
[DIS]
[ENA]
[ENA]
[AIS]
[AIS]
[AIS]
[LOS]
[LOS]
[CI]
YES
YES
NO
NO
Standard Option
ADC Option
Default configurations
are in bold.
Loopback to Network
LOS to CPE
AIS to CPE
FT1 idle to NET & CPE
Pass on LOS to NET
Send AIS to NET
Send AIS-CI to NET