Front Panel LTPH-UM-1049-02, Issue 2
6 January 9, 2002 H2TU-C-319 List 4E
LOOPBACK MESSAGES
CLOC Customer Local Loopback Signal from customer is looped back to the customer at the
H2TU-R.
CREM Customer Remote Loopback Signal from customer is looped back to the customer at H2TU-C.
NLOC Network Local Loopback DSX-1 signal is looped back to the network at the H2TU-C.
NREM Network Remote Loopback DSX-1 signal is looped back to the network at the H2TU-R.
SMJK Remote SmartJack Loopback DSX-1 signal is looped back to the network at the H2TU-R
SmartJack module.
DIAGNOSTIC MESSAGES
A = xx Maximum Loop Attenuation The Attenuation (A) message appears followed by xx, where xx is
the loop attenuation of the longest (maximum loss) span, measured
in dB.
ACQ Acquisition The multiplexers of the H2TU-C and H2TU-R (or the H2TU-C and
first regenerator) are trying to establish synchronization over the
HDSL2 loop of Span 1.
ARM HiGain System Armed Armed to respond to Intelligent Repeater Loop (ILR) codes.
BAD RT? No Response from H2TU-R The H2TU -C receives no response from the H2TU-R and all HDSL2
loop conditions are normal. Therefore, the integrity of the H2TU-R
or the HDSL2 loop is questionable.
FERR Framing Bit Error Occurred Framing bit error occurred at H2TU-C DSX-1 input.
FLDL Flash Download Flash download of firmware upgrades. Contact Customer Service
for upgrade procedures (see “Appendix D - Product Support” on
page75).
HES HDSL2 CRC Error H2TU-C HDSL2 Loop Cyclical Redundancy Check (CRC) error.
LBPV Local Bipolar Violation A bipolar violation has been received at the DSX-1 input to the
H2TU-C.
M=xx HDSL2 Loop Margin Indicates the power of the received HDSL2 signal relative to noise
(S/N with respect to 21.5 dB). Any value of 6 dB or greater is
adequate for reliable system operation.
MNGD Managed The H2TU-C is under control of the HMU-319 Network management
unit. In this state, the front-panel craft port and pushbuttons are
disabled.
PWR FEED OFF Power Feed Off HDSL2 span power has b een turned off by setting the PWFD option
to off, or HDSL2 span power has been turned off by use of the A2LB
Intelligent Office Repeater (IOR) Power Down code.
PWR FEED ON Power Feed On Indicates that the HDSL2 loop is not grounded or shorted.
SIG Signaling The transceivers of the H2TU-C and H2TU-R (or the H2TU-C and
first regenerator) are trying to establish contact with each other over
the HDSL2 loop of Span 1.
Continued
Table 2. Front-Panel Display Messages (Continued)Message Full Name Description