I have a problem transfering incoming calls between lines in the device. The lines are extensions from my IP exchange.
Example:A physical extension (9122) calls the ip extension (9170) and this call needs to be transfered to other ip extension (9172), so in the 9170 i dial flash + 9172, then the person in the 9172 receive the call and talk to 9170, then after 9170 hook the phone and the call terminate.