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56 VIP-4R/4T Installation and Configuration
VIP Port Adapter Functions
Table 12
X.21 Adapter Cable Signals
DTE Cable
DCE Cable
VIP End, HD
1
6-Position Plug
1. HD = high density.
Network End,
DB-15 Plug
VIP End, HD
60Position Plug
Network End,
DB-15
Receptacle
Signal
Pin
Pin
Signal
Signal
Pin
Pin
Signal
Shield ground
46
1
Shield ground
Shield ground
46
1
Shield ground
TxD/RxD+
11
—>
2
T
RxD/TxD+
11
—>
2
T
TxD/RxD–
12
—>
9
Transmit–
RxD/TxD–
12
—>
9
Transmit–
RTS/CTS+
9
—>
3
CTS/RTS+
9
—>
3
RTS/CTS –
10
—>
10
Control–
CTS/RTS –
10
—>
10
Control–
RxD/TxD+
28
<—
4
TxD/RxD+
28
<—
4
RxD/TxD–
27
<—
11
Receive–
TxD/RxD–
27
<—
11
Receive–
CTS/RTS+
1
<—
5
Ind
RTS/CTS+
1
<—
5
Ind
CTS/RTS –
2
<—
12
Indication–
RTS/CTS–
2
<—
12
Indication–
RxC/TxCE+
26
<—
6
TxC/RxC+
26
<—
6
RxC/TxCE–
25
<—
13
Timing–
TxC/RxC –
25
<—
13
Timing–
Circuit ground
15
8
Circuit ground
Circuit ground
15
8
Circuit ground
Ground
Mode_2
48
47
Shorting group
Ground
Mode_2
48
47
Shorting
group
Ground
Mode_DCE
51
52
Shorting group
Ground
Mode_DCE
51
52