Telog Data Download Cable

The diagram below shows the inter-connections between a PC and a Telog Linecorder.

In most cases, dispensing with the resistors and connecting Pin 5 of the PC directly to Pin 7 of the Telog will work. However, it has been known for many notebooks to not have Pin 5 (signal ground) connected. R1 and R2 provide an "alternative ground" arrangement for this situation yet limit any ground loop currents that may exist should both Pin 5 and the case be connected within the PC. A full explanation regarding this can be found here.

R1, R2	-    10 to 22 ohms, ¼watt resistor.
P1	-    DB9 female connector
P2	-    DB9 male connector

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©  M.T.P. - 18.07.01