6
Section 61246045L1-5, Issue 2
61246045L1-5B
Table 5. LED Operation During Standard/Enhanced Loopbacks
LED
Descriptions and Indications
Standard Operation:
NET LP1 and LP2 .... Both of these LEDs will remain solid when an HRE network loopback is active.
CUST LP1 and LP2 . Both of these LEDs will go Off when an HRE network loopback is enabled, and will come
back On after the unit has synchronized with the HTU-C.
LL/RL ....................... This LED will be yellow when an HRE network (local) loopback is active. HRE customer
(remote) loopback is not available when using Standard Loopback code.
Enhanced Operation:
NET LP1 and LP2 .... Both of these LEDs will remain solid when an HRE network or customer loopback is active.
CUST LP1 and LP2 . Both of these LEDs will remain solid when an HRE network or customer loopback is active.
LL/RL ....................... This LED will be yellow when an HRE network (local) loopback is active. The LED will be
green when an HRE customer (remote) loopback is active.
Figure 2. CSA Deployment Guidelines
0
12
11
10
9
8
7
6
5
4
3
2
1
0
1
2
3
4
WORKING LENGTH OF 26 GAUGE CABLE (KFT)
WORKING LENGTH OF 24 GAUGE (OR COARSER) CABLE (KFT)
5
6
7
8
9
2.5
2.0
1.5
1.0
0.5
0.0
TOTAL
BRIDGED
TAP
LENGTH
(KFT)
VALID CSA CABLE LENGTHS
INVALID CSA CABLE LENGTHS
Performance monitoring, diagnostics, and loopbacks
are also available from the craft interface at the
HTU-C and HTU-R.
When testing indicates a faulty circuit pack, refer to
the housing installation/maintenance practice for the
entry and pressurization control, then replace the
faulty circuit pack.
An in-band loopback test can be performed from the
central office (see Appendix A of this practice).
ADTRAN does not recommend field repair of this
unit. Repair services may be obtained by returning
the defective unit to the ADTRAN Customer and
Product Support (CAPS) Department.
6. SPECIFICATIONS
Specifications for the ADTRAN 239 HRE are
detailed in
Table 7
.
Table 6. Loop Insertion Loss Data
Frequency (Hz)
Maximum Loss (dB)
3000 .....................................12.0
10,000 .................................. 15.0
50,000 .................................. 25.5
100,000 ................................ 30.0
150,000 ................................ 32.75
200,000 ................................ 35.25
