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Cable Diagram Pin Assignments Passport 4400 Hardware Installation Manual
A-11
Figure A-8. Cable Model No. NTAU26AA - 4400 to DCE
NC NC
15-Pin
X.21 Male
MD50
Male
To 4400
Data Terminal
Equipment (DTE)
To Data
Communication
Equipment
(DCE)
Receive Data A 20 4 Receive Data A
Receive Data B 45 11 Receive Data A
Control A 8 3 Clocking A
Control B 33 10 Clocking A
Transmit Data A 6 2 Transmit Data A (TD A)
Transmit Data B 31 9 Transmit Data B (TD B)
Transmit Data Clock A 21 6 Signalling A (S B)
Transmit Data Clock B 46 13 Signalling B (S B)
Indication A 22 5 Internal Clocking A (IC A)
Indication B 47 12 Internal Clocking B (IC B)
Ground 43 8 Ground (GND)
Unassigned 50 15 Unassigned (UN A)
External Select A 1
Ground 26
External Select B 2
Ground 27
Cable Present Status 14
Ground 39 1 Frame Ground (F GND)