Zywall USG 110 - VoIP - BLF not working
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The NOTIFY seems to be coming back on a different port 3953 ? is this relevant ?
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Hi @Spiro
For check the symptom more details, you can send the WAN and LAN packets by private message to me.
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Hi Stanley,
Has this issue been resolved?
Can you share a how-to?
This is a very common issue.
We work-around it very often by asking to change from SIP over UDP to SIP over TCP.
But I have not had any luck in getting WAN and LAN traces before and after to find the root cause.
Best regards,
Alcindo
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