In this paper we present a data analysis regarding globular clusters as possible extragalactic distance indicators .
For this purpose , we collected all velocity dispersion measurements published for galactic and M31 globular clusters .
The slope and the zero-point of the Faber-Jackson relation were calibrated using Hipparcos distance measurements , and the relation was applied to extragalactic globular clusters in M31 .
A distance modulus of 24.12 \pm 0.45 mag was found .
This is coherent with what is found by fitting the red giant branches of globular clusters ( 24.47 \pm 0.07 , Holland 98 ) , and is found from the peak of globular clusters luminosity function ( 24.03 \pm 0.23 , Ostriker and Gnedin 97 ) , but shorter than the 24.7 \pm 0.2 mag ( Lanoix et al .
98 ) and 24.77 \pm 0.11 mag ( Feast and Catchpole 97 ) , obtained by using Hipparcos data to calibrate the Cepheid period-luminosity .
This calibrated Faber-Jackson relation can now be directly use for other Sc galaxies with resolved globular clusters , as soon as large amounts of spectra will become available , e.g. , through the VLT .