- Mon 21st Mar 2016, 08:25
#3897
I had an Asus RT-N10+ router and my Grandstream HT502 had no trouble connecting to my SIP providers. I recently upgraded to an Asus DSL-N55U modem/router and now my HT502 cannot register with any SIP server. I used a utility to detect if SIP ALG was in use and it was so I disabled it. I verified it was disabled with the same utility that told me it was active. So SIP ALG is disabled on the router but I still cannot get the HT502 to register with any SIP service. I have tried static IP, DMZ, Port Forwarding, changing ports on HT502, etc. No matter what I do the HT502 will not register to a SIP server when connected via this router. The status of the HT502 shows "unknown NAT" and both lines as "Not Registered". I am hoping someone here will know what to do so I can get my SIP service working again.
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