ADTRAN Total Reach TRDDB, Руководство по установке и обслуживанию

Страница: 7 / 10

7 61291004L2-5, Issue 2 61291004L2-5B
Remote End Initiated LBK Tests
The TRDDB supports loopbacks generated from the
TROCU-R which allow testing to be performed
without coordination with the CO or test center.
These loopbacks, initiated by the TROCU-R front
panel LBK pushbutton aid in system turn-up testing or
troubleshooting from the remote end.
The TRDDB responds to a loopback command
initiated at the TROCU-R as follows:
Pressing the LBK pushbutton once will initiate a
loopback at the TRDDB towards the customer. See
Figure 9
. This allows data to be sent from the remote
end to test the local loop and the TROCU-R.
Pressing the LBK pushbutton a second time initiates a
loopback at the TROCU-R towards the 4-wire DDS
(CPE) interface. See
Figure 10
. Pressing the LBK
pushbutton a third time disables all current latching
loopbacks initiated by the LBK pushbutton.
If errors exist the loopbacks can help determine the
source; either the local loop or the TROCU-R. During
a remote end initiated loopback the Total Reach
system transmits ASC 9Eh towards the network
indicating an out-of-service condition generated by
the remote end as seen in Figure 9 and Figure 10.
All Total Reach system latching loopbacks, whether
initiated by the craft interface, LBK pushbutton, or via
the Test Center or CO, may be disabled by sending 35
TIP bytes <X0111010> where X is a “don’t care”. All
existing latching loopbacks may also be disabled by
pressing the LBK pushbutton on the CO or remote
units.
4. REMOTE PROVISIONING AND
DIAGNOSTICS
Control Protocol
Remote access to provisioning and status information
is accomplished using ADTRAN Digital System 6
Message protocol, defined in Control and Diagnostic
Procedures Practice, Section 6032991-6. Digital
System 6 is supported by the TPI 108/109 and 105
portable test set and is supported by Hekimian React
2001 Release 1.900 remote test system. The Total
Reach DDS network elements comply with ANSI
T1.107-1995, “ Digital Hierarchy Format
Specifications Annex G ” which allows remote
provisioning, querying, and performance monitoring
via in-band control of network elements.
NOTE
The REACT 2001 GUI software Release
supports ANSI T1.107-1995.
Figure 10. TROCU-R Remote End Initiated Loopback, Customer Loop
Figure 9. TROCU-R Remote End Initiated Loopback, Local Loop
4-Wire
CPE Interface
TR
OCU-R
Push once for Total Reach
DDB Loopback
Local Loop
ASC 9Eh
TR
DDB
Loopback
Pushbutton
Test
Set
4-Wire
CPE Interface
TR
OCU-R
Push twice for Total Reach
OCU-R Loopback
Local Loop
ASC 9Eh
TR
DDB
Loopback
Pushbutton
Test
Set
ASC 9Eh