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Front Panel LTPH-UM-1031-03, Issue 3
6 September 12, 2003 H4TU-C-319 List 1
LOOPBACK MESSAGES
CDU1 Customer Doubler 1 Loopback DS1 signal from customer is looped back to the customer at H4D1
(111100).
CDU2 Customer Doubler 2 Loopback DS1 signal from customer is looped back to the customer at H4D2
(111110).
CLOC Customer Local Loopback DS1 signal from customer is looped back to the customer at the H4TU-R.
COLB Central Office Loopback Dual loopback at the H4TU-C.
CREM Customer Remote Loopback DS1 signal from customer is looped back to the customer at the
H4TU-C.
NDU1 Network Doubler 1 Loopback Signal is looped back to the network at H4D1 (110000).
NDU2 Network Doubler 2 Loopback Signal is looped back to the network at H4D2 (111000).
NLOC Network Local Loopback DSX-1 signal is looped back to the network at the H4TU-C.
NREM Network Remote Loopback DSX-1 signal is looped back to the network at the H4TU-R.
RULB Remote Unit Loopback Dual loopback at the H4TU-R.
SMJK Remote SmartJack Loopback DSX-1 signal is looped back to the network at the H4TU-R SmartJack
module.
DIAGNOSTIC MESSAGES
A=xx Maximum Loop Attenuation The Attenuation (A) message appears followed by xx, where xx is the
highest loop attenuation of all HDSL interfaces.
ACQ1 or ACQ2 Acquisition 1 or Acquisition 2 The multiplexers of the H4TU-C and H4TU-R are trying to establish
synchronization over HDSL4 Loop 1 or Loop 2.
ARM System Armed Armed to respond to Intelligent Repeater Loop (ILR) codes.
BAD RT? No Response from H4TU-R The H4TU-C receives no response from the H4TU-R, and all HDSL4
loop conditions are normal; therefore, the integrity of the H4TU-R or
the HDSL4 loops is questionable.
FERR Framing Bit Error Occurred Framing bit error occurred at H4TU-C DSX-1 input.
HxES HDSL4 CRC Error Loop 1 or Loop 2 H4TU-C HDSL4 Loop 1 or Loop 2 Cyclical Redundancy Check (CRC)
error. (Loop 1 has display priority over Loop 2.)
LBPV Local Bipolar Violation A bipolar violation has been received at the DSX-1 input to the
H4TU-C-319.
1=xx or 2=xx HDSL4 Loop Margin Indicates the power of the received HDSL4 signal on each loop relative
to noise (S/N with respect to 21.5 dB). Any value of 6 dB or greater is
adequate for reliable system operation. (xx denotes lowest margin in
dB for Loop 1 and Loop 2.)
MNGD Managed The H4TU-C-319 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 HDSL4 span power has been turned off by setting the PWRF option to
OFF, or HDSL4 span power has been turned off by use of the A5LB
Intelligent Office Repeater (IOR) powerdown code.
PWR FEED ON Power Feed On Indicates that the HDSL4 loop power is applied and neither pair is
grounded.
SIG1 or SIG2 Signaling The transceivers of the H4TU-C and H4TU-R are trying to establish
contact with each other over HDSL4 on Loop 1 or Loop 2.
SYSTEM INFORMATION MESSAGES
(a)
VER x.xx Software Version Number The software version number of the H4TU-C-319.
LIST xx List Number The list number of the H4TU-C-319.
Continued
Table 2. Front-Panel Display Messages (Continued)
Message Full Name Description