Transfer Call with Yealink T42G and Panasonic with extension card

[joopbox]

Hi,
anybody knowns how to configure T42G to get working the Call Transfer to an other extension using the Transfer Soft key with a Panasonic PBX with their SIP extension card?

With Panasonic SIP Phones works correctly. We are testing one T42G before replace it, but we only get it working with the next complicate process for users ;-)

HOLD
Create New call (wait for answer)
HANG

Thanks for advance