I have uploaded the image of the DB9 connector with pins labelled and I am referring to the pin in the below tabloe as per the picture.

With Pin 5 as ground

Voltages at various pins are as follows


Voltage at end of cable -0.15 at pin 1
-11.45 at pins 4,7 ,9.

Voltage on PC port -11.3 at pin 3 and 4
-11.45 at pin 7.

The remianing pins have either 0 Volt or very small voltage like 0.15 V.

I have tested the working of the port and cable by connecting the same to a Data acquistion unit and the data was read correctly.

So There is problem in the way I am using hyperterminal or I am using the wrong pins while testing using hyperterminal.