Post-Power Testing; Table 18 - Resistance Table Referenced To The Rj45 At The Pidu Plus - Motorola PTP 400 Series User Manual

Table 18 - Resistance Table Referenced To The RJ45 At The PIDU Plus

11.3.2 Post-Power Testing

1 Connect the RJ45 to the PIDU and apply power. The power LED should be illuminated
continuously. If the power LED does not illuminate unplug the ODU connection from the
PIDU and check the power LED illumination. If the power LED still does not light then
check the power source.
2 The Ethernet LED should be observed starting with 10 slow flashes, 30 seconds after
powering. This confirms that the ODU has the correct power connections, if the Ethernet
LED does not light check the wiring to pins 4 & 5 and 7 & 8.
3 If a computer, switch or router is connected to the LAN side of the PIDU Plus then the
Ethernet LED should flash with network activity. If the Ethernet LED does not show
Ethernet activity then the network equipment and the Ethernet cables need to be
checked, specifically continuity through to the ODU of pins 1 & 2 and 3 & 6.
CAT-5 Resistance
Length pins 4-7
meters ohms
0 0.0
10 1.7
20 3.4
30 5.1
40 6.8
50 8.5
60 10.2
70 11.9
80 13.6
90 15.3
100 17.0
152
Resistance
pins 8-5
ohms
2.3
4.0
5.7
7.4
9.1
10.8
12.5
14.2
15.9
17.6
19.3