Loopback Operation; Loopback Summary - ADC HiGain H2TU-C-319 List 4E User Manual

LTPH-UM-1049-02, Issue 2
L O
OOPBACK PERATION
HiGain HDSL2 has a family of loopback options for analyzing circuit functionality. The loopback signal is
transmitted and returned to the sending device for comparison. This allows you to verify the integrity of the
HDSL2 channels to the H2TU-C, the H2TU-C DSX-1 interface and the DS1 channels to the customer. Loopback
options include:
• Generic Loopback (GNLB) commands, including the SmartJack (SMJK) option (see
• Special Loopback (SPLB) commands (see
command tables:
–
Addressable Repeater Loopback commands: A2LB (see
–
Addressable Repeater Loopback commands: A3LB, A4LB (see
Loopback commands can be initiated by:
• Selecting the loopback type using the MODE and LBK pushbuttons on the H2TU-C front panel or the manual
loopback (LBK) pushbutton on the H2TU-R.
•
Selecting the loopback type from the Monitor menu when connected to the craft port of the H2TU-C or
H2TU-R
•
Entering the loopback code into the test equipment connected to the H2TU-C or H2TU-R.
Activate loopback using
one of the following:
• MODE/SEL pushbuttons
• Maintenance terminal
• Test set
HiGain supports multiple loopbacks, but a single loopback is the preferred method.
H2TU-C-319 List 4E
"Special Loopback Commands" on page
NLOC CREM
H2TU-C
Network
Figure 31. Loopback Summary
January 9, 2002
Table 22 on page
56) and the following
Table 21 on page 52)
Table 24 on page
Activate loopback using
one of the following:
• Loopback pushbutton
NREM
• Maintenance terminal
SMJK CLOC
• Test set
TLOS
H2TU-R
Customer
Premises
Testing
56)
64)
55