Link Interfaces Reference
3-6 — Orbitor 3000 Reference Manual
V.35 Link Pinouts
The connector shown here and pinouts described here correspond to
the connector labeled “V.35” on the back of the Orbitor 3000.
13
1
25
14
DB25 Female DTE
DB25
Contact
Number
M.34
Contact
Number
CCITT
Circuit
Number
Circuit
Name
Direction
To From
DCE DCE
1
A
Protective Ground
NA
2
----------
3
----------
4
C
105
Request to Send
X
5
----------
6
E
107
Data Set Ready
X
7
B
102
Signal Ground
NA
8
F
109
Data Channel Received Line Signal Detector
X
9
P
103
Transmitted Data (A)
X
10
S
103
Transmitted Data (B)
X
11
R
104
Received Data (A)
X
12
T
104
Received Data (B)
X
13
----------
14
V
115
Receiver Signal Element Timing (A)
X
15
----------
16
X
115
Receiver Signal Element Timing (B)
X
17
----------
18
U
113
Transmitter Signal Element Timing (A) DTE
X
19
W
113
Transmitter Signal Element Timing (B) DTE
X
20
H
108.2
Data Terminal Ready
X
21
141
Local Loopback
X
22
J
125
Calling Indicator
X
23
Y
114
Transmitter Signal Element Timing (A)
X
24
----------
25
a
114
Transmitter Signal Element Timing (B)
X
Figure 3—7 V.35 Link Pin Outs
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.
