Hello, in our dialplan we have enabled multiple-registrations, so 2 phones can register on a single directory entry. <param name="multiple-registrations" value="true"/> Both phones are registered, both phones can be called and each phone can call the other phone. However in an attended_transfer mode calls cannot be transferred to the other phone with the same number. Attended_transfer in this case is needed when you take a call on your main SIP phone and and then want to transfer it to your mobile DECT/SIP phone, because you may have to check something in another room. I did a SIP trace and see the following: * A invites B(phone 1) => ok * B(phone 1) places call on hold => ok * B(phone 1) dials number B(phone 2 DECT) on second line * Freeswitch send Invite to B(phone 1) => ok * Freeswitch send Invite to B(phone 2 DECT) * B(phone 2 DECT) sends Ringing to Freeswitch => ok * B(phone 1) sends Busy to Freeswitch * B(phone 1) displays Busy and hangs up the second line Is there any way to overcome this? Is there a way to ignore the Busy from phone 1 when phone 2 answers Ringing? Best regards Peter