Extension(Device) Port

I am running asterisk 1.8.4.2 and I am running into an issue that I did not have with older installs .
I am running couple of devices that I would like to use a different port for sip registration than 5060 . I would like to use 55060. So I changed a device to this
[207]
deny=0.0.0.0/0.0.0.0
secret=207P@ss
dtmfmode=rfc2833
canreinvite=no
context=from-internal
host=dynamic
trustrpid=yes
sendrpid=no
type=friend
nat=yes
port=55060
qualify=yes
qualifyfreq=60
transport=udp
encryption=no
callgroup=
pickupgroup=
dial=SIP/207
mailbox=207@default
permit=0.0.0.0/0.0.0.0
callerid=device <207>
callcounter=yes
faxdetect=no
cc_monitor_policy=generic

Unfortunately the device cannot register with the new port 55060 . I did a test and it still successfully registers with 5060 . It works on 1.6 (Trixbox CE)

Any help appreciated

I don’t think this does what you think it does. It does not make Asterisk listen on another port. It is probably mainly useful with a static address, as it is the port used at the far end.

I do want that one device to use port 55060 insted of 5060. This is how i did it in the past

For a dynamic device, the remote end port should be in the REGISTER request it sends.

it’s a Polycom Phone and i do change the port on the phone but nothing happens , dose not register with anything but 5060