I have a two VLAN in CISCO 3750 VLAN 501, VLAN 502.
I have a hosted SIP-PBX in internet.
I have a NAT on two VLANS and one public white IP on cisco 1841 router.
501 - for PCs and not for VoIP. 192.168.0.1/255.255.255.128 with Windows 2008 DHCP.
502 - only for SIP VOIP phones 192.168.0.129/255.255.255.128 with cisco DHCP (including option 66, DNS, gateway, etc).
When i connect some SPA502G-7.4.9c to 501 VLAN SIP working fine, i can call, can recieve calls, make registration.
When i connect some SPA502G-7.4.9c to 502 VLAN SIP does't work on phone. Logs has thouse messages:
RSE_DEBUG: getting alternate from domain
SIP:RegFailed;Retry in 30s
no response recieved.
When i connect notebook to VLAN 502 i have got internet, ping to sip host, can connect with softphone to PBX and make calls.
Routing, DNS, firewall rules are fine, i checked this 10000 ways.
Please, help me to troubleshouting this issue, i have no idea that is this?!!
Wrong forum, try "small business -phones".