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Interface Signals
Table B-2
EIA-530 DTE Interface Signals
EIA Circuit
P1 Pin
Designation
1
2
14
3
16
4
19
5
13
6
22
20
23
7
8
10
15
12
17
9
24
11
25
Table B-3
Network Interface RJ48 Pin/Signal Assignments
Function
Receive Data (Ring)
Receive Data (Tip)
Send Data (Ring)
Send Data (Tip)
Note: The remaining leads are not used.
B-2
—
Allows shield connections via pin number 1.
BA(A)
Transfers data signals from DTE for transmission over communication
BA(B)
line.
BB(A)
Transfers data signals received over communications line by Data Set
BB(B)
to DTE.
CA(A)
Indicates to Data Set that DTE is prepared to transmit.
CA(B)
CB(A)
Indicates to DTE that Data Set is prepared to transmit.
CB(B)
CC(A)
Indicates to DTE that Data Set is operational.
CC(B)
CD(A)
Indicates to Data Set that DTE is prepared for data communications.
CD(B)
AB
Establishes common ground reference for all interface circuits except
protective ground.
CF(A)
Indicates to DTE that Data Set is receiving data (not idle or OOS
CF(B)
codes).
DB(A)
Transfers transmitter signal timing information from Data Set to DTE.
DB(B)
DD(A)
Transfers receiver signal timing information from Data Set to DTE.
DD(B)
DA(A)
Transfers transmitter signal timing information from DTE to Data Set.
DA(B)
TM
Indicates whether the local DCE is in a test condition.
Direction
To DSU
To DSU
From DSU
From DSU
SpectraComm 553 Fractional T1 DSU
Installation and Operation Manual
Description
Pin No.
1
2
4
5
076R155-000
Issue 7
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