Performance Monitoring From The H2Tu-R - ADC HIGAIN HDSL2 Manual

152-231-116-01, Revision 01
P
ERFORMANCE
If the downstream device detected is an H2TU-R List 4, in addition to the standard features of the H2TU-R, its
functionality will be enhanced to produce unique Performance Monitoring (PM) and testing capabilities.
Network surveillance is a key maintenance strategy. Real-time monitoring of performance through sectionalized
analysis allows maintenance personnel to quickly locate a service degradation or failure. This also makes it easier
to determine if the customer or network operator must bear responsibility for service and repair.
The Performance Monitoring screens analyze the DS1 transmission by tracking the four transmission legs shown
in Figure 11.
When installed on one end of an HDSL2 DS1 circuit, the remote unit provides the following special network
benefits:
•
Real-time performance monitoring of DS1 signals in both directions of transmission
•
Non-intrusive access to real-time performance monitoring data (CPE-provided SF or ESF signal)
•
Easy access to stored DS1 PM data using the craft port, 11-bit inband commands, or Facility Data Link
(FDL):
–
Performance statistics (current, 25-hour, 48-hour, and 31-day)
–
Sectionalized events for all four legs of DS1 transmission
–
Blockage indicator (a quality-of-service summary statistic for the NET-TX and CPE-TX transmission
legs at the DS1 interface)
• Easy access to stored HDSL2 PM data
•
AIS-CI insertion toward the network upon detection of incoming LOS or AIS at the network interface
•
RAI-CI insertion toward the network upon receiving RAI from the CPE, if the signal from the network is not
impaired
• Loopback toward the network with AIS insertion to the CPE equipment
• 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
•
Easy access to remote provisioning:
–
Non-intrusive, using TL1 or FDL commands
–
Intrusive, using 11-bit payload commands
H2TU-C-231 List 1F
M
ONITORING FROM THE
Leg 1
Network Out (NET-TX)
Network
Leg 4
NET-RX
Figure 11. Sectionalized Analysis of the DS1 Interface
October 2, 2000
H2TU-R
Leg 2
CPE-RX
H2TU-R
Customer Interface
Leg 3
Network In (CPE-TX)
Monitoring System Activity and Performance
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