Loopback Testing Using A Maintenance Terminal; Loopback Testing Using Remote Unit Front-Panel Pushbuttons - ADC HiGain H2TU-C-202 User Manual

LTPH-UM-1208-01
Name Binary Code
NLOC 1111-1111-0001-1110 (FF1E)
CREM 0011-1111-0001-1110 (3F1E)
NREM 1111-1111-0000-0010 (FF02)
CLOC 0011-1111-0000-0010 (3F02)
SMJK 11000-11000-11000 ...
SMJK 100000 100000 100000 ...
SMJK 1111-1111-0100-1000 (FF48)
Loopdown 11100-11100-11100 ...
Loopdown 100-100-100 ...
Loopdown 1111-1111-0010-0100 (FF24)
(a) The leftmost bit arrives first in all sequences. The detection algorithm functions reliably with a random 10
on the facility. The entire arming and loopback sequence can also be initiated at the remote H2TU-R location.
(b) This loopback command is only valid when the SmartJack Loopback (LPBK) option is configured to ENABLED.

Loopback Testing Using a Maintenance Terminal

To activate a loopback session using a maintenance terminal:
ESC
1 Press to clear the Config menu, then press
2 Press the SPACEBAR
the loopback. Press
3 To manually terminate the loopback, press the
confirm.

Loopback Testing Using Remote Unit Front-Panel Pushbuttons

On the H2TU-R front panel, press the appropriate pushbutton for 5 or more seconds:
• LLB—Activates a dual loopback at the H2TU-R (NREM + CLOC).
• RLB—Activates a dual loopback at the H2TU-C (NLOC + CREM).
To loopdown any active loopback in the system, including SMJK and TLOS, press the LLB or RLB
pushbutton for 5 or more seconds. To activate a dual loopback after a loopdown, again press the LLB or RLB
pushbutton for 5 or more seconds.
H2TU-C-202 List 7G
Table 25. Addressable Repeater Loopback Commands (A3LB)
(a)
(Hexadecimal Equivalent)
to select the NLOC, NREM, CLOC, or CREM loopback, then press
Y to confirm.
Description
H2TU-C loopup from NI
H2TU-C loopup from CI
H2TU-R loopup from NI
H2TU-R loopup from CI
H2TU-R loopup from NI
H2TU-R loopup from N
H2TU-R loopup from NI (ESF-DL)
H2TU-C and H2TU-R loopdown from NI OR CI
H2TU-C and H2TU-R loopdown from NI OR CI
H2TU-C and H2TU-R loopdown from NI OR CI (ESF-DL)
M
to select the Monitor screen.
SPACEBAR
to select LPDN, then press
June 6, 2003
(b)
(b)
(b)
-3
Bit Error Ratio (BER)
ENTER to activate
ENTER
. Press
Testing
Y
to
47