Cables and Pin Assignments
C-4
7520-A2-GB20-20
May 1998
V.35 User Data Port Connector
The following table provides the pin assignments for the 34-position
V.35 connector to the user data terminal equipment.
Signal
ITU
CT #
Direction
34-Pin
Socket
Connector
Signal Ground/Common
102
—
B
Request to Send ( RTS )
105
To DSU (In)
C
Clear to Send ( CTS )
106
From DSU (Out)
D
Data Set Ready ( DSR )
107
From DSU (Out)
E
Received Line Signal Detector
( RLSD or LSD )
109
From DSU (Out)
F
Data Terminal Ready ( DTR )
108/1, /2
To DSU (In)
H
Remote Loopback ( RL )
140
To DSU (In)
N
Local Loopback ( LL )
141
To DSU (In)
L
Transmitted Data ( TXD )
103
To DSU (In)
P ( A )
S ( B )
Received Data ( RXD )
104
From DSU (Out)
R ( A )
T ( B )
Transmitter Signal Element Timing –
DTE Source ( XTXC or TT )
113
To DSU (In)
U ( A )
W ( B )
Receiver Signal Element Timing –
DCE Source ( RXC )
115
From DSU (Out)
V ( A )
X ( B )
Transmitter Signal Element Timing –
DCE Source ( TXC )
114
From DSU (Out)
Y ( A )
AA ( B )
Test Mode Indicator ( TM )
142
From DSU (Out)
NN
Summary of Contents for 7520
Page 1: ...MODEL 7520 DSU USER S GUIDE Document No 7520 A2 GB20 20 May 1998...
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Page 24: ...Customizing the DSU 3 4 7520 A2 GB20 20 May 1998 This page intentionally left blank...
Page 36: ...Monitoring the DSU 4 12 7520 A2 GB20 20 May 1998 This page intentionally left blank...