Appendix I - Network Composite Cables
X.21/V.11 STRAIGHT
DB15F Multiplexer Composite DTE
to Network DCE Cable
MUX DB15M Connector
UNC 4/40 Screws
V.11 DB15M Connector
M3 Screws
2
Type at Connector
(Normal Use)
1
1
SHIELD
-
8
8
G
Common Return
2
2
T(A)
Generator
9
9
T(B)
Generator
3
3
C(A)
Generator
10
10
C(B)
Generator
4
4
R(A)
Load
11
11
R(B)
Load
5
5
I(A)
Load
12
12
I(B)
Load
6
6
S(A)
Load
13
13
S(B)
Load
Notes: 1
Pin 14 on Mux not Connected
2
V.11 Male for connection to NTU must have M3 Screws. Mux end has
4/40 screws unless National Regulations permit the use of UNC 4/40. Each
cable end must be clearly identifiable.
3
Dashed lines show wires to be twisted pairs.
4
Cable type: Belden 9506, 6 wire twisted pair overall screen (or equivalent).
Maximum length 100 Metres.
5
Connector shell and termination must be as specified in the EMC section
(Appendix C.)
