Nortel Networks Passport 4400 User Manual
Page 124
Cable Diagram Pin Assignments
Passport 4400 Hardware Installation Manual
A-8
Figure A-5. Cable Model No. NTAU19AA - 4400 to DTE Equipment
25-Pin RS-232
Female
MD50
Male
To 4400
Data Terminal
Equipment (DTE)
To Data Terminal
Equipment (DTE)
Clear to Send
9
4
Request to Send (RTS)
Data Set Ready
10
20
Data Terminal Ready (DTR)
Carrier Detect
11
11
Unassigned (UN)
Request to Send
12
5
Clear to Send (CTS)
Unassigned
13
8
Carrier Detect (CD)
Data Terminal Ready
37
6
Data Set Ready (DSR)
External Receive Clock 232
15
15
Serial Clock Transmit A (SCT A)
External Transmit Clock 232
40
17
Serial Clock Receive A (SCR A)
Transmit Data 232
16
3
Receive Data (RD)
Transmit Clock 232
41
2
Transmit Data (RD)
Receive Data Clock 232
42
24
Serial Clock Transmit External (SCTE)
Ground
43
7
Signal Ground (SG)
Cable Present Status
14
25
Unasigned (UN A)
Ground
39
Receive Data B
45
Ground
48
Transmit Clock B
46
Ground
49
Receive Clock B
47
Ground
50
1
Frame Ground (FGND)