Paradyne T1 T1 Access Mux 926x User Manual
Page 284
Cables, Connectors, and Pin Assignments
E-10
9161-A2-GH30-30
April 1998
The following table provides the pin assignments for the 25-position Sync Data
connector/interface and a DTE’s 37-position RS449 connector.
Signal
ITU/
CCITT #
25-Pin
Plug
Pin #
Direction
37-Pin
Socket
Pin #
Shield
—
1
—
1
Transmit Data ( TXD/ TD )
103
2 ( A ),
14 ( B )
To DCE
4 (A),
22 (B)
Receive Data ( RXD/ RD )
104
3 ( A ),
16 ( B )
From DCE
6 (A),
24 (B)
Request to Send ( RTS )
105
4 ( A ),
19 ( B )
To DCE
7 (A),
25 (B)
Clear to Send ( CTS )
106
5 ( A ),
13 ( B )
From DCE
9 (A),
27 (B)
Data Set Ready/ Data Mode
( DSR/ DM )
107
6
From DCE
11 (A)
Signal Ground (SG)
102A
7
—
19
Data Channel Received Line
Signal Detect / Receiver Ready
( RLSD/ RR )
109
8 ( A ),
10 ( B )
From DCE
13 (A),
31 (B)
Transmitter Signal Element
Timing/Transmit Timing ( TXC ) —
DCE Source
114
15 ( A ),
12 ( B )
From DCE
5 (A),
23 (B)
Receiver Signal Element Timing/
Receive Timing ( RXC ) —
DCE Source
115
17 ( A ),
9 ( B )
From DCE
8 (A),
26 (B)
Local Loopback ( LL )
141
18
To DCE
10
Data Terminal (or DTE ) Ready
( DTR/ TR )
108/1, /2
20
To DCE
12 (A)
Remote Loopback ( RL )
140
21
To DCE
14
Receive Common ( RC )
102B
23
—
20, 29
Transmitter Signal Element/
Terminal Timing ( TT ) —
DTE Source
113
24 ( A ),
11 ( B )
To DCE
17 (A),
35 (B)
Test Mode ( TM )
142
25
From DCE
18
no connection
—
—
—
30, 37