Payload Retrieval Of Margin And Pulse Attenuation Parameters - ADC H2TU-C-202 User Manual

LTPH-UM-1161-01
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Easy access to stored HDSL2 PM data
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AIS-CI insertion toward the network upon detection of incoming LOS or AIS at the network interface
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RAI-CI insertion toward the network upon receiving RAI from the CPE, if the signal from the network is not
impaired
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Loopback toward the network with AIS insertion to the CPE equipment
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Adaptive frame format conversion if enabled in:
–
SF to ANSI T1.403 ESF
–
Non-standard to standard ANSI T1.403 ESF
–
AT&T PUB 54016 to ANSI T1.403 ESF
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Easy access to remote provisioning:
– Non-intrusive, FDL using TL1 commands
– Intrusive, using 11-bit payload commands
Network Elements (NE), such as the ADA T3AS test and performance monitoring system, can be used to collect
the performance monitoring data to allow full-time surveillance of the DS1 signal. By installing T3AS at a
network boundary, such as Interexchange Carrier (IEC), Point of Presence (POP), and a remote unit at the network
interface, the Local Exchange Carrier (LEC) can monitor the performance of its portion of the network and rapidly
sectionalize circuit problems. By sectionalizing problems in its network, the LEC knows, without external
involvement, what trouble exists as well as the responsible party.
P R
AYLOAD ETRIEVAL OF
P
ARAMETERS
The H2TU-C has been enhanced with a new feature that allows an upstream test center to retrieve information on
the circuit's margin and pulse attenuation. This is accomplished by issuing an intrusive 16-bit inband command
DBDB (1101 1011 1101 1011) from the test center towards the line unit. The command is patterned after the
16-bit intelligent repeater loopback commands described in
command must be sent for at least 5 seconds. The circuit may be armed. The line unit must be in the NLOC
network loopback state before the retrieval command is issued. After detecting the 16-bit command, the line unit
generates and returns a specific number of bit errors indicating a specific combination of margin and pulse
attenuations as listed in
command is being received. The error burst response always reflects the most recent performance parameters. If
the HDSL2 loop is down, LOSW, a response corresponding to a margin of 5 or less, will be sent. This command
is a permanent feature of the List 3F and cannot be disabled.
H2TU-C-202 List 3F
M
ARGIN AND
Table 11 on page 28. The error burst occurs every 20 seconds for as long as the DBDB
June 28, 2002
Monitoring System Activity and Performance
P A
ULSE TTENUATION
"Loopback Test Procedures" on page 55. The
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