61246045L1-5B
Section 61246045L1-5, Issue 2
5
Table 4. LED Indicators
Five tricolored faceplate LEDs indicate these HRE states.
LED
Descriptions and Indications
NET LP1 .................. This LED indicates the HDSL signal quality and errors on NET loop 1. The NET LP1 LED will flash
once when an errored second is detected on NET loop 1. If the NET LP1 LED flashes yellow rapidly
(six times per second), sealing current is present and the HRE is attempting to synchronize with the
other HDSL circuit elements.
Off .......... No synchronization with the HTU-C.
Green ...... Synchronized with good signal quality on NET loop 1 (> 2 dB margin).
Yellow .... Synchronized with marginal signal quality on NET loop 1 (1 to 2 dB margin).
Red ......... Synchronized with poor signal quality on NET loop 1 (0 dB margin).
NET LP2 .................. This LED indicates the HDSL signal quality and errors on NET loop 2. NET LP2 LED will flash once
when an errored second is detected on NET loop 2.
Off .......... No synchronization with the HTU-C.
Green ...... Synchronized with good signal quality on NET loop 2 (> 2 dB margin).
Yellow .... Synchronized with marginal signal quality on NET loop 2 (1 to 2 dB margin).
Red ......... Synchronized with poor signal quality on NET loop 2 (0 dB margin).
CUST LP1 ................ This LED indicates HDSL signal quality, loopback status, and errors on CUST loop 1. It will flash
once when an errored second is detected on CUST loop 1.
Off .......... No synchronization with the HTU-R.
Green ...... Synchronized with good signal quality on CUST loop 1 (> 2 dB margin).
Yellow .... Synchronized with marginal signal quality on CUST loop 1 (1 to 2 dB margin).
Red ......... Synchronized with poor signal quality on CUST loop 1 (0 dB margin).
CUST LP2 ................ This LED indicates HDSL signal quality and errors on CUST loop 2. It will flash once when an
errored second is detected on CUST loop 2.
Off .......... No synchronization with the HTU-R.
Green ...... Synchronized with good signal quality on CUST loop 2 (> 2 dB margin).
Yellow .... Synchronized with marginal signal quality on CUST loop 2 (1 to 2 dB margin).
Red ......... Synchronized with poor signal quality on CUST loop 2 (0 dB margin).
LL ...................................... Local Loopback. Indicates loopback from the HRE toward the network is active.
RL ...................................... Remote Loopback. Indicates loopback from the HRE toward the customer is active.
Loopback control codes are governed by the HTU-C (and HRE(s) if deployed). Standard or Enhanced loopback codes are
used dependent on the type of HTU-C deployed. See Appendix A for a more detailed description of Standard and Enhanced
loopback coding.
Note: If the signal quality is good and the pulse attenuation is bad, the LED will blink green. If the signal
quality is marginal and the pulse attenuation is good, the LED will be solid Yellow.
1246045L1
239 HRE
LP1
LP2
LP1
LP2
LL
(Y)
N
E
T
C
U
S
T
RL
(G)
