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Interface Signals
Table B-4
Network Interface Signal Assignments – SpectraComm Shelf
with 50-pin Connector Back Panel (Connectors J17 – J19)
Signal
Receive Data (Ring)
Receive Data (Tip)
Transmit Data (Ring)
Transmit Data (Tip)
Signal
Receive Data (Ring)
Receive Data (Tip)
Transmit Data (Ring)
Transmit Data (Tip)
Signal
Receive Data (Ring)
Receive Data (Tip)
Transmit Data (Ring)
Transmit Data (Tip)
Signal
Receive Data (Ring)
Receive Data (Tip)
Transmit Data (Ring)
Transmit Data (Tip)
Table B-5
Cascade Port and Station Clock RJ48 Pin/Signal Assignments
Cascade Receive Data (Ring)
Cascade Receive Data (Tip)
Cascade Send Data (Ring)
Cascade Send Data (Tip)
Station Clock A
Station Clock B
Unused
076R155-000
Issue 7
(Slot 1) J17
1
26
3
28
(Slot 5) J17
17
42
19
44
(Slot 9) J18
9
34
11
36
(Slot 13) J19
1
26
3
28
Function
SpectraComm 553 Fractional T1 DSU
Installation and Operation Manual
(Slot 2) J17
(Slot 3) J17
5
9
30
34
7
11
32
36
(Slot 6) J17
(Slot 7) J18
21
1
46
26
23
3
48
28
(Slot 10) J18
(Slot 11) J18
13
17
38
42
15
19
40
44
(Slot 14) J19
(Slot 15) J19
5
9
30
34
7
11
32
36
Direction
Pin No.
To DSU
4
To DSU
5
From DSU
1
From DSU
2
To DSU
6
To DSU
3
N/A
8
(Slot 4) J17
3
38
15
40
(Slot 8) J18
5
30
7
32
(Slot 12) J18
21
46
23
48
(Slot 16) J19
13
38
15
40
B-3
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