Mike's PBX Cookbook

NTBK48AA
3 port serial "Octopus Cable"

NTBK48AA - DB9F to 3/DB25M - 3 Port SDI Cable for Option 11
Provides TTY port access, also used to program MGC cards in slot zero.

DB-9 Female
Option 11
NT Cable
Colour
DB-25 Male
TTY Port
 

Cable 1 - Port 0

1 Green 8
2 Red 3
3 Brown 2
4 Blue 4 & 20
5 Black 7
 

Cable 2 - Port 1

6 Red 3
7 Brown 2
5 Black 7
  8 & 4
6 & 20
 

Cable 3 - Port 2

8 Blue 3
9 Green 2
5 Black 7
  8 & 4
6 & 20

One 9 pin D type to 3x 25 pin D type: TTY port 0, 1, and 2.

ntbk48aa TTY cable

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