Unlock siemens phones

[eetnas]

Hi I have a load of old siemens M55 and A55 phones. The work (UNI) wants them unlocked for some projects for the students. I have a cable that plugs in to the 9 pin Coms port (rs232 is written on the connector)The other end plugs in to the seimens phones.I have hunted the net for software to unlock the phones so we can put differnt sims in them. Does anyone have any software to unlock them. I am using winXP put i could use any op system.

[Termy]

I dont have the program any longer, but what you need is an aftermarket cable and a program called Freia v10, 11 or 15. Try google.