Icot Troubleshooting Procedures; Figure 9. Csa Deployment Guidelines; Table 3. Hdsl Loss Values; Table 4. Loop Insertion Loss Data - ADTRAN 3192 Integrated Central Office Terminal Installation And Maintenance Manual

12
11
INVALID CSA CABLE LENGTHS
10
9
8
7
6
5
4
3
2
VALID CSA CABLE LENGTHS
1
0
0 1 2 3
WORKING LENGTH OF 26 GAUGE CABLE (KFT)

Figure 9. CSA Deployment Guidelines

Loop loss per kft for other wire is summarized in
Table 3.
Recommended maximum local loop loss information
for PIC cable at 70°F, 135 Ω resistive termination is
provided in Table 4.
An approximation for the maximum amount of
wideband noise on an HDSL local loop as measured
by a 50 kb filter is -31 dBrn.
An approximation for the maximum level of impulse
noise as measured using a 50 kb filter on an HDSL
loop is -50 dBrn.
Condition
All front panel indicators are Off.
Power is present and adequate, but
loop sync is not available (LP1
and/or LP2 LEDs are Off).
61179512L2-5A
TOTAL
BRIDGED
2.5
TAP
2.0
1.5
LENGTH
1.0
(KFT)
0.5
0.0
4 5 6 7 8

Table 5. ICOT Troubleshooting Guide

Solution
1. Make sure the ICOT is properly seated in the housing.
2. Verify that the ICOT is delivering sufficient simplex voltage to the loops, if line powered.
3. If steps 1 and 2 pass, replace the ICOT.
1. Verify that the loop conforms with CSA guidelines (not too long, etc.).
2. Verify that the tip and ring of each HDSL loop belong to the same twisted pair.
3. Verify that loop loss at 200 kHz is not greater than 35.25 dB.
4. Verify that noise on both HDSL loops is within acceptable limits.
5. If steps 1 through 4 pass and loop sync is still not available, replace the unit with one known
to be in proper working condition.
Section 61179512L2-5, Issue 1

Table 3. HDSL Loss Values

(200 kHz cable loss in dB/kft at 135 Ω)
Cable Gauge Cable Type
26
26
24
24
22
22
19
19

Table 4. Loop Insertion Loss Data

Frequency
(Hz)
3,000 .............................................. 12.00
10,000 ............................................ 15.00
50,000 ............................................ 25.50
9
100,000 .......................................... 30.00
150,000 .......................................... 32.75
196,000 .......................................... 35.00
200,000 .......................................... 35.25
250,000 .......................................... 37.50
300,000 .......................................... 42.00
These approximations are to be used as guidelines
only and may vary slightly on different loops.
Adhering to the guidelines should produce
performance in excess of 10

6. ICOT TROUBLESHOOTING PROCEDURES

Use Table 5 to troubleshoot the ADTRAN Total
Access ICOT.
Temperature
° °
68 90
PIC 3.902 4.051
Pulp 4.030 4.179
PIC 2.863 2.957
Pulp 3.159 3.257
PIC 2.198 2.255
Pulp 2.483 2.450
PIC 1.551 1.587
Pulp 1.817 1.856
Maximum Loss
(dB)
NOTE
-7 BER.
°
120
4.253
4.381
2.083
3.391
2.333
2.629
1.634
1.909
7