T200 Htu-R, Sp/60 Ma Loopbacks; Front Panel Pushbuttons; Table 14. T200 Htu-R, Sp/60 Ma Front Panel Pushbuttons - ADTRAN T200 HTU-R Installation And Maintenance Manual

T200 HTU-R, SP/60 mA Loopbacks

The T200 HTU-R, SP/60 mA responds to two different loopback activation processes. First,
loopbacks may be commanded manually using the control port interface.
the Loopback Options Screen which provides for HTU-C, T200 HTU-R, SP/60 mA, and HRE
loopbacks.
Second, the T200 HTU-R, SP/60 mA responds to the industry standard sequences for HDSL
loopbacks. These loopback sequences are described in detail in
The loopback condition imposed in both cases is a logic level loopback at the point within the
T200 HTU-R, SP/60 mA where the DSX-1 signal passes into the HDSL modulators.
depicts all the loopback locations possible with ADTRAN HDSL equipment.
In addition to network-side loopbacks, the T200 HTU-R, SP/60 mA provides customer-side
loopbacks initiated by using the terminal control port. In this mode, an AIS signal is supplied
to the network. Customer-side loopbacks must be deactivated using the terminal.
When the 11000 in-band code is used to loop the T200 HTU-R, SP/60
mA, the T200 HTU-R, SP/60 mA will re-enter armed state upon
loopback timeout, or upon terminal deactivation. See
HDSL Loopbacks"
states.

Front Panel Pushbuttons

Two loopback ( ) buttons are accessible from the front panel. The
LBK
a customer loopback at the T200 HTU-R, SP/60 mA. The
tional loopback at the T200 HTU-R, SP/60 mA. Refer to

Table 14. T200 HTU-R, SP/60 mA Front Panel Pushbuttons

Pushbutton Function
Pressing this button changes the T200 HTU-R, SP/60 mA customer loopback
REM
state as follows:
Pressing this button changes the T200 HTU-R, SP/60 mA bidirectional loopback
LOC
state as follows:
61247026L1-5A
for a more detailed description of loopback element
• If the T200 HTU-R, SP/60 mA is not in loopback, pressing
customer loopback.
• If the T200 HTU-R, SP/60 mA is in loopback, pressing
deactivates the loopback.
• If the T200 HTU-R, SP/60 mA is not in loopback, pressing
the bidirectional loopback.
• If the T200 HTU-R, SP/60 mA
the bidirectional loopback.
"Appendix A, HDSL
NOTE
loopback button controls a bidirec-
LOC
Table 14 for details.
is in loopback, pressing
HDSL System Testing
Figure 10 depicts
Loopbacks".
Figure 18
"Appendix A,
loopback button controls
REM
activates a
REM
REM
activates
LOC
deactivates
LOC
31