Quote:
Originally Posted by Cyberian75
Direct calls to my VSPs are okay, though.
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That doesn't mean your NAT settings are correct.
If your SPA-3000 is behind a NAT router the problem may be solved by settings the following:
(under SIP tab)
Handle_VIA_received: yes
Handle_VIA_rport: yes
Insert_VIA_received: yes
Insert_VIA_rport: yes
Substitute_VIA_Addr: yes
Send_Resp_To_Src_Port: yes
STUN_Enable: yes
STUN_Server: stun.voxalot.com:3478 (or any STUN server such as 'stun01.sipphone.com:3478' or 'stun.sipgate.net:10000')
NAT_Keep_Alive_Intvl: 179
(under Line_1 and Line_2 (or PSTN_Line) tabs)
NAT_Mapping_Enable: yes
NAT_Keep_Alive_Enable: yes
NAT_Keep_Alive_Msg: (this setting should be blank)
NAT_Keep_Alive_Dest: $PROXY
Register Expires: 3600
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If you prefer to operate your ATA without a stun server make the following changes to the above settings:
1. Forward the SIP ports and the RTP port range from the router to the ATA.
2. Set "STUN Enable:" no
3. Set "NAT Keep Alive Enable:" no
4. In order for the ATA to know it's public IP address, make sure it is registered with at least one SIP registrar, or enter your public IP address into the "EXT IP:" field).
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If the problem persists it may indicate your ATA is behind a Symmetric NAT device. Here is a strategy that will adapt to whatever Symmetric NAT status is present:
1. Use settings shown above in bold type.
2. In your ATA set "STUN Test Enable:" = yes.
3. In your Voxalot account set "Symmetric NAT Handling" = yes
When active, Voxalot's "Symmetric NAT Handling" option routes the voice packets through a Voxalot proxy. Note; even when you set "Symmetric NAT Handling" = yes Voxalot will not activate this option unless it detects that your ATA has disabled NAT mapping. See the below quote from the Linksys ATA manual:
"If the STUN Enable feature is enabled and a valid STUN server is available, the Linksys ATA can perform a NAT-type discovery operation when it powers on. It contacts the configured STUN server, and the result of the discovery is reported in a Warning header in all subsequent REGISTER requests.
If the Linksys ATA detects symmetric NAT or a symmetric firewall, NAT mapping is disabled."