55
Configure the interface modules for V.36,
X.21 and RS530
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The connector for X.21 is a 15 pin DSUB according to X.21 standard. For RS530 the
connector is a 25 pin DSUB according to RS530 standard. The same 25 pin DSUB is
also used for the V.36 connection contrary to the 37 pin DSUB listed in the standard.
The pin lay-out is found in figure
and the explanation to designation in table
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A
Designations of terminals according to CCITT, EIA etc.
B
Designations of terminals according to CCITT, EIA etc.
DCE
Data communication equipment (= multiplexer, etc.)
DTE
Data terminal equipment (= protection)
DTE READY
Data terminal ready (follows auxiliary voltage)
GND
Earth (reference for signals)
RCLK
Receiver signal timing
* not for V.36
8 GND
7
6 RCLK
5
4 RXD(A)
3
2 TXD (A)
1 SCREEN
15
14
RCLK(B) 13
12
RXD(B) 11
10
TXD (B) 9
15 pin DSUB
X.21
25 pin DSUB
13
12 TCLK DCE (B)
11 TCLK DTE (B)
10
9 RCLK (B)
8
7 GND
6
5
4 REQ SEND (A)
3 RXD (A)
2 TXD (A)
1 SCREEN
25
TCLK DTE(A) 24
DTE READY(B)* 23
22
21
DTE READY(A) 20
REQ SEND (B)* 19
18
RCLK(A) 17
RXD(B) 16
TCLK DCE(A) 15
TXD (B) 14
V.36, RS530
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Summary of Contents for REL 551 2.3 Series
Page 16: ...10 Note signs KDSWHU 6DIHW LQIRUPDWLRQ ...
Page 44: ...38 Checking the binary I O circuits KDSWHU KHFNLQJ WKH H WHUQDO FLUFXLWU ...
Page 52: ...46 Checking the self supervision signals KDSWHU QHUJLVLQJ WKH WHUPLQDO ...
Page 140: ...134 Testing the interaction of the distance protection KDSWHU 7HVWLQJ WKH SURWHFWLRQ V VWHP ...
