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Appendix A - Specifications 152-388-100-02, Issue 2
50 June 6, 2000 H2TU-C-388 List 1
LOOP ATTENUATION
Each loop has no more than 35 dB of loss at 196 kHz, with driving and terminating impedances of 135Ω (see
Table 19 below).
HIGAIN LINE UNIT CARD-EDGE CONNECTOR
Figure 28 shows the card-edge connectors on the HiGain Line Unit. Active pins are highlighted in black.
Figure 28. HiGain Line Unit Card-Edge Connector
Network Management Control Bus
The H2TU-C-388 provides a Network Management Control Bus on pin 104 of the card-edge connector. This
allows the various ADC Management System protocols to manage the H2TU-C through the HMU-319 HiGain
Management Unit. Whenever the H2TU-C-388 is under management, the MNGD message displays periodically on
the front-panel display.
Table 19. HDSL2 Cable Attenuation Chart
Cable Gauge Loss at 196 kHz (dB/kft) Ω per kft
26/0.4 mm 3.88 83
24/0.51 mm 2.84 52
22/0.61 mm 2.18 32
19/0.91 mm 1.54 16
Some HiGain Line Unit features are affected when it is under management. Consult the
management unit practice for further information.
106
105
104
103
102
101
100
DSX-1OUT
DSX-1IN
HDSL2Span
205
204
203
202
201
200
119
118
117
116
115
114
113
112
111
110
Ground
Ground
Frameground
Fusealarm*
Ring1
Tip1
Management bus
Ring
Ring1
Tip
Tip1
Factoryburn-in
-48Vdc
219
218
217
216
215
214
213
212
211
210
209
208
207
206
109
108
107
* Fuse alarm is normally floating (0 to 80Vdc max.) and
at -48Vdc (10 mA max.) when activated.