Connections; Figure 3. 220 Htu-C Edge Connector Wiring - ADTRAN 220 HTU-C Installation And Maintenance Practice

HDSL 220 Transceiver Unit for Central Office Installation and Maintenance Practice

CONNECTIONS

The 220 HTU-C occupies one card slot in a 220 office repeater shelf. Power and alarm signals
are provided to the card through the backplane of the shelf. DSX-1 and HDSL loop signals are
connected to the shelf connector and transmitted to the corresponding slot the 220 HTU-C
occupies. Connections to the DSX-1 pins are intended for intra-building wiring only. Refer to
Figure 3 for the 220 HTU-C edge connection wiring.
10
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Chassis Ground
25
Loop 1 HDSL Tip (Wire-Wrap)
26
Loop 1 HDSL Ring (Wire-Wrap)
27
28
29
30
31
Fuse Alarm
32
33
Loop 2 HDSL Tip (Wire-Wrap)
34
Loop 2 HDSL Ring (Wire-Wrap)
35
36
37
38
39
40
41
DSX-1 Rx Tip (Wire-Wrap)
42
DSX-1 Rx Ring (Wire-Wrap)
43
44
45
46
47
48
DSX-1 Tx Tip (Wire-Wrap)
49
DSX-1 Rx Ring (Wire-Wrap)
50

Figure 3. 220 HTU-C Edge Connector Wiring

–48V RET
–48V
Input to HTU-C
Input to HTU-C
–48V RET
Output from HTU-C
Output from HTU-C
61247001L1-5A