Figure 4. Htu-C Card Edge Connections - ADTRAN HTU-C NB Installation And Maintenance Practice

J1, Row A
1
Frame Ground
2
Tip 1 Narrowband
3
Ring 1 Narrowband
4
Tip 2 Narrowband
5
Ring 2 Narrowband
6
7
8
9
10
11
12
13
Switch Battery (-48 VDC)
14
15
Positive Relay VCC (+5 VDC)
16
17
Active A side signal
18
Logic and 5V system ground
19
A-side transmit circuit clock (4.096 MHz)
20
A-side receive circuit clock (4.096 MHz)
21
Logic and 5V system ground
22
A-side frame sync (1 kHz)
23
A-side receive data channel (8.192 MHz)
24
25
26
27
A-side transmit data channel (8.192 MHz)
28
29
30
31
32
J1, Row B
Surge Ground
1
Frame Ground
2
Test Bus for Loop 1 (tip)
3
Test Bus for Loop 1 (ring)
4
Test Bus for Loop 2 (tip)
5
Test Bus for Loop 2 (ring)
6
7
8
9
10
11
12
Switch Battery Return (-48 VDC return)
13
14
15
16
17
Active B side signal
18
Logic and 5V system ground
19
B-side transmit circuit clock (4.096 MHz)
20
B-side receive circuit clock (4.096 MHz)
21
Logic and 5V system ground
22
B-side frame sync (1 kHz)
23
B-side receive data channel (8.192 MHz)
24
25
26
27
B-side transmit data channel (8.192 MHz)
28
29
30
31
32
J1, Row C
1
Frame Ground
2
3
4
5
6
Tip 1 Wideband
7
Ring 1 Wideband
8
Tip 2 Wideband
9
Ring 2 Wideband
10
11
12
13
14
15
16
17
T1 clock A-side (6.176 MHz)
18
Logic and 5V system ground
19
T1 clock B-side (6.176 MHz)
20
T1 frame sync A-side (8 kHz)
21
Logic and 5V system ground
22
T1 frame sync B-side (8 kHz)
23
24
25
26
27
28
29
30
31
32