Token Ring Pinout - IBM 5500 Operational, Installation, And Maintenance Manual

Token Ring Pinout

Table 1: DB25 Pinouts and Standards
Host Port Phase
3
4
5
6
7
DB25 cables must meet or exceed these electrical characteristics shown
below:
8-Pair shielded wire gage
Characteristic impedance
DC resistance
Capacitance between
conductors
Capacitance conductor to shield
Attenuation
The Token Ring Pinout are as follows:
Table 2: Token Ring Pinout
D-Shell RJ-45
Connector Connector
Pin Pin
Shield Shield
(ground) (ground)
1
2
Appendix B: LED Flash States and Wiring Diagrams
DB25 PIN
B 17
A 5
B 18
A 6
B 19
A 7
B 20
A 8
B 21
A 9
26 (7x34)
110 ! 10 ohm @ 1 MHz
42.6 ohm/1000'
18 pf/1' @ 1 MHz
31 pf/1' @ 1 MHz
30 dB/1000' @ 1 MHz
Usage
Ground
4 Receive
Reserved
Appendix B 161