SPA504 / 303 - How to config CFWD on 2nd and 3rd extension?

[tecnasoft]

Hello everyone!

I am writing here hoping to find a solution to a problem that is making me lose a lot of time.
I have a phone (SPA504) configured with three extensions (100,200,300) of an Asterisk PBX.
I need to configure the CallForwardAllNumbers for all three extensions.
If I press CFWD, I enter the number and DIAL, only incoming calls to the first extension (100) are properly forwarded, while for the others, the phone continues to ring.

I also tried with a SPA303 with the same configuration.
Both phones are updated to the latest firmware version (7.5.6a)

How can I do?
Thank you for help!

[Dan Lukes]

There is no such feature on SPA[35]xx

But there should not be problem to implement it by self with Asterisk, isn't it ? Feel free to forward calls for all those numbers on the Asterisk level.