Nortel Networks Passport 4400 - Manual (Page 126)

Cable Diagram Pin Assignments Passport 4400 Hardware Installation Manual
A-10
Figure A-7. Cable Model No. NTAU27AA - 4400 to DTE
NC NC
15-Pin
X.21 Female
To Data
Terminal
Equipment (DTE)
MD50
Male
To 4400
Data Terminal
Equipment (DTE)
Receive Data 20 2 Transmit Data A (TD A)
Receive Data B 45 9 Transmit Data B (TD B)
Control A 8 5 Internal Clocking A (IC A)
Control B 33 12 Internal Clocking B (IC B)
Transmit Data A V11 6 4 Receive Data A (RD A)
Transmit Data B V11 31 11 Receive Data B (RD B)
Indication A 22 3 Clocking A
Indication B 47 10 Clocking B
External Receive Data Clock A V11 7 6 Signalling A
External Transmit Clock B V11 32 13 Signalling B
Ground 43 8 Ground (GND)
External Select A (EXT SEL A) 1
Ground 26
External Select B (EXT SEL B) 2
Gound 27
Cable Present Status 14
Ground 39 15 Unassigned (UN A)
Unassigned 50 1 Frame Ground (F GND)