Can't de-register default base

[Nigutz]

(11-27-2014 08:37 PM)Yealink_Wilson Wrote:  Hi Nigutz,

1. Access to phone menu->Settings->Registration->De-reg. Handset->enter the PIN number, default is 0000. Choose the handset which you want to de-registration.
2. If you register one handset to more than one base, you can access to phone menu->Settings->Registration->Select base, choose the base you want to register.
For more information, please refer to the user guide of W52P.
Yealink_W52P_User_Guide_V73

thanks

Hello,

maybe I wan't clear, but It's not possible to deregister a base if this handset is not "connected" to the base.

To be more clear my problem is: the handset has in its config a pre registered base. I don't have in my hands this base (it's in an other office in an other continent). I can't deregister the handset without the base, all I got when trying to deregister is "Not in range".
The base I'm trying to register (in my office) is working properly with 2 other handsets.
It's impossible to register this handset with this base if I don't deregister the handset to the previous base.

So I need a way to "force" deregistration to the handset.

Thanks for your help