Smartjack loopback commands, Manual loopback session, Anual – ADC HiGain H2TU-C-319 List 4E User Manual
Page 65: Oopback, Ession
LTPH-UM-1049-02, Issue 2
Testing
H2TU-C-319 List 4E
January 9, 2002
57
SmartJack Loopback Commands
The HiGain HDSL2 SmartJack (SMJK) Loopback (LPBK) commands allow you to use in-band, out-of-band, and
universal codes to initiate and terminate loopback testing of the HiGain HDSL2 circuit. (See
for additional information.)
M
ANUAL
L
OOPBACK
S
ESSION
A manual loopback session allows you to select any one of the HiGain HDSL2 loopbacks listed in
.
Setting the Loopback Time-Out Option
Before initiating a loopback session, verify that the Loopback/MTA Time-out parameter is set to the desired
setting.
1
Use the MODE and LBK pushbuttons as described in
“Setting Options through MODE and LBK” on page 10
The Loopback Time-out parameter is also user-selectable from the System Settings screen when using a
maintenance terminal.
2
Select the desired setting:
•
NONE (time-out disabled)
•
20 minutes
•
60 minutes
•
120 minutes (default setting)
Activating Manual Loopback Mode
To initiate a manual loopback session:
1
Press both the MODE and LBK pushbuttons on the front panel for at least 3 seconds. The following message
appears on the front-panel display:
MAN LPBK NLO?
With the exception of SmartJack, any of the HiGain HDSL2 loopbacks can be executed using the
MODE and LBK pushbuttons.
When executing a manual loopback session using the MODE and LBK pushbuttons:
•
The next loopback option can be displayed by pressing the MODE pushbutton, however, the
previously activated loopback remains active until the LBK pushbutton is pressed, which
activates the new loopback.
•
If neither pushbutton is pressed for a period of 30 seconds and no loopback is in effect, the
manual loopback session terminates and the display returns to normal mode.
•
If any loopback is in effect, the 30-second time-out is inhibited. The active loopback and the
manual loopback session continue until the loopback times out in accordance with the LBTO
setting.
•
Only the SMJK loopback can exist with other network loopbacks at any given time.
•
If there is an active loopback, pressing the MODE and LBK pushbuttons for 3 or more
seconds terminates any active loopback, ends the manual loopback session and returns the
display to normal mode.