A cisco cable is meant to connect a pc or laptop to the console port of a Cisco device. The cable is a set containing these parts:
The original wiring of this Cisco cable with its DB9-RJ45 adapter is according to this table:
|signal (PC)||DB-9 adapter||color||RJ45 adapter||flat RJ45 cable||flat RJ45 cable|
Notice that the flat RJ45 cable is a so-called "roll-over" cable, where 1 to 8 is connected with 8 to 1 respectively on the other end.
The RJ45 connector of the GPS kit is described here (only relevant signals shown):
|8||input||supply||supply. +5V stab. or +10 tot +25V unstab. (SW5)|
|3||input||RS232||NMEA data port input.|
|2||output||RS232||NMEA data port output.|
To create a cable with which the serial information can be transported to the pc's serail port and the power supply is inserted on the RJ45 cable the wiring inside the DB9-RJ45 adapter needs te be changed.
Prepare the USB or PS/2 cable by cutting it at the correct length (the distance between the USB or PS/2 port and the serial port of the laptop) and strip the cable in such a way that the 2 wires that contain the power supply are left over. (look here)
Make the following connections:
Use short pieces of thermal schrinking tube to isolate the joints, and use a tie-wrap over the supply cable to secure it in the adapter. Make sure the power supply jumper on the PCB is in the 5V position.
Double-check the wiring, and connect the cable to the laptop or PC and the GPS receiver. Check the supply voltage on the GPS module - it should be between 4,75 and 5,25V.