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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Since several people have suggested to avoid SIP ALG at all costs, I have disabled it and banged my head some more! Without SIP ALG, only one of my Polycom 335s can Register. The other 5 fail. (With SIP ALG they all register fine).<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Now I have found that changing:<o:p></o:p></p><p class=MsoNormal><b>SETTINGS>SIP>LOCAL SIP PORT></b> to a UNIQUE port (5066 in this case)<o:p></o:p></p><p class=MsoNormal>And<o:p></o:p></p><p class=MsoNormal><b>SETTINGS>NETWORK>NAT>SIGNALING PORT></b> to the same UNIQUE port<o:p></o:p></p><p class=MsoNormal>I got a second phone to REGISTER and exchange calls!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>When I say unique port, I mean unique to all the phones on this NAT Router.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>My question is “Is that fine?”<o:p></o:p></p><p class=MsoNormal>I just want to know if there are limitations on the SIP Port number? Are there issues I should watch out for.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal>Sean<o:p></o:p></p></div></body></html>