Black Box Series 5000 Reference Manual page 37

DB25 M.34
Contact Contact
Number Number
1 A
2
3
4 C
5
6 E
7 B
8 F
9 P
10 S
11 R
12 T
13
14 V
15
16 X
17
18 U
19 W
20 H
21
22 J
23 Y
24
25 a
The connecting cable must be a shielded cable.
Circuits which are paired (contain an (A) and (B) reference) should be connected to twisted pairs
within the connecting cable.
NOTE For U.K. Approval:
The connecting cable should be manufactured from Belden Cable, or a cable with equivalent specifications.
One end must be terminated in a male 34 pin X.21 bis connector as defined in ISO-2593 1984. The other
end must be terminated in a male 25 pin X.21 bis connector as defined in ISO-2110 1989. The cable may be
any length between 0 and 5M.
V.35 Link Pinouts
13
25
DB25 Female DTE
CCITT
Circuit
Number
105
107
102
109 Data Channel Received Line Signal Detector
103
103
104
104
115 Receiver Signal Element Timing (A)
115 Receiver Signal Element Timing (B)
113 Transmitter Signal Element Timing (A) DTE
113 Transmitter Signal Element Timing (B) DTE
108.2
141
125
114 Transmitter Signal Element Timing (A)
114 Transmitter Signal Element Timing (B)
Figure 3 - 10 V.35 Link Pin Outs
37
Link Interfaces Reference
1
14
Circuit
Name
Protective Ground
----------
----------
Request to Send
----------
Data Set Ready
Signal Ground
Transmitted Data (A)
Transmitted Data (B)
Received Data (A)
Received Data (B)
----------
----------
----------
Data Terminal Ready
Local Loopback
Calling Indicator
----------
Direction
To From
DCE DCE
NA
X
X
NA
X
X
X
X
X
X
X
X
X
X
X
X
X
X