
62
Firewall User Guide
DB-25 (RS-232) to V.35 Adapter
C
H
M
S
W
AA
EE
KK
MM
HH
CC
Y
U
P
K
E
A
D
J
N
T
X
BB
FF
LL
NN
J
DD
Z
V
R
L
F
B
Chassis Ground
Request To Send
Data Set Ready
Data Terminal Ready
Signal Designation
V.35 34-pin Connector
Send Data (A)
Send Data (B)
Terminal Timing (A)
Terminal Timing (B)
Send Timing (A)
Send Timing (B)
Receive Data (A)
Receive Data (B)
Receive Timing (A)
Receive Timing (B)
Signal Ground
Clear To Send
Data Carrier Detect
Signal Designation
As viewed from the connector side
V.35 34-Pin
Connector (Male)
DB-25 25-Pin
Connector (Female)
Protective Ground
Signal Ground
Request To Send
Clear To Send
Data Set Ready
Data Carrier Detect
Data Terminal Ready
Transmit Data A
Receive Data A
Transmit Data B
Receive Data B
External TX Clock A
Receive Clock A
External TX Clock B
Receive Clock B
Transmit Clock A
Transmit Clock B
A
B
C
D
E
F
H
P
R
S
T
U
V
W
X
Y
a
1
7
4
5
6
8
20
2
3
12
22
23
17
25
18
15
21
* The RS-232C Interface circuits have been designed to meet
the electrical specifications given in EIA (Electronic Industries
Association) RS-232C and CCITT (Consultive Committee
International Telegraph and Telephone) V.24 Standards
** When configured for V.35 interface operation on the link, the
V.35 adapter cable should be used. This cable uses a 25-pin
female connector at one end and a 34-pin winchester male
connector at the other.
Remote Configuration Cable
Frame Gound
Transmit Data (TX)
Receive Data (RX)
Request To Send (RTS)
Clear to Send (CTS)
Signal Ground
25-PIN Male
To Command Port
Connector
1
2
3
4
5
6
7
8
20
22
25-PIN Male
To DCE Device
(i.e., Modem)
1
2
3
4
5
6
7
8
20
22
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