Table 7. Total Reach Dataport Loopbacks
Total Reach DDS | Total Reach DDS |
Dataports | Dataport Loopbacks |
|
|
1291006L1, L2, L3, L4, |
|
1410105L2, 1425105L2, | OCU |
1430105L2, 1433105L1 |
|
1433105L3, 1433105L4 |
|
|
|
1291006L5 (US West) | DS0 |
1433105L2 (US West) |
|
|
|
If the
Total Reach |
Dataport |
Test Unit |
Data |
Bidirectional |
loopback |
Figure 6. Total Reach Dataport Bidirectional Loopback Pass-Thru Mode
If a Total Reach dataport bidirectional loopback is invoked after the
Total Reach |
| |
Dataport |
| |
| ||
X | DSU/CSU | |
X | ||
| ||
Open Loop |
| |
Bidirectional |
| |
loopback |
|
Figure 7. Total Reach Dataport Bidirectional
Loopback Normal Mode
5. DEPLOYMENT GUIDELINES
The TROCU DP and
¥All loops must be nonloaded.
¥Actual Measured Loss (AML) should not exceed 50 dB at 13.3 kHz (135 Ω termination), the Nyquist frequency of TRDDS.
NOTE
The 50 dB AML limit includes 6 dB of signal margin to account for potential
¥Loop length should not exceed 50 kft.
¥Bridged tap length should not exceed 12 kft.
¥Background noise level should not exceed 34 dBrn.
¥Impulse noise should not exceed
NOTE
Measure noise with 50 kbit weighting characteristic approximating a filter with a passband of 40 Hz to 30 kHz. Background noise level or impulse noise level is referenced from 56/ 64 kbps data rate in TR62310.
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