Every New Registration uses a diffrent port

hey guys… I have a couple of accounts with Vbuzzer setup on asterisk, and i have 10 phones on the same asterisk box that are working fine but i keep on getting from 2 phones…

-- Registered SIP '1416623****' at 89.***.***.*** port 50287 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63071 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50288 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63074 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50289 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63078 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50291 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63082 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50293 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63085 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50295 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63093 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50296 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63129 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50297 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63131 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50298 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63134 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50300 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63137 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50302 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63141 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50303 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63144 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50304 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63152 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50305 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63159 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50307 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63169 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50309 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63174 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50311 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63181 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50312 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63185 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50313 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63189 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50314 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63192 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50315 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63194 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50317 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63196 expires 30 -- Registered SIP '1416623****' at 89.***.***.*** port 50320 expires 30 -- Registered SIP '1416623****' at 77.***.***.*** port 63198 expires 30

Why do they keep on changing their ports? eventhough that all of the 10 phones have the exact same settings. just these 2 phones keeps on changing their ports.

and why aren’t the ports 5060?

thanks

za3toor