LINKSYS WRP400: Voice recorded but the number doesn't work don't no (not in service) (no SIP response)

Hello everyone,

I have a weird and frustrating problem with some Linksys WRP400 and I hope you can give me advice.

Long story short: the voice on the WRP400 line keeps stop working, even if it is registered on my SIP PBX. Only a reboot of the router or a stop put on the line temporarily fix the issue.

Let's add some details: I had a lot of WRP400 installed and running, and not all of them have this problem. They all have the same configuration.

I tried to work around the problem, reducing registry expires 3600 to 1200, defining to call without Reg and years call without Reg, setting on restrict the IP Source address and reset daily at 05:00. It doesn't seem to help.

When the problem occurs, if I call the voice line number I get an error "the number you have dialed is not in service" or similar. Sometimes my clients said they can make an outgoing call, while the problem is still on, but more often, the line is totally silent on the outbound road.

On my SIP PBX, I see that the number is regularly recorded, with the right timing.

If I do a sniff of Wireshark on my SIP PBX, I see some regular "ask: INVITE sip:[email protected]/ * /: 5060; transport = udp, with description of session' a PBX to the router but the router never answers.

If I reboot, the vocal line to re-register and start working again.

I have attached a screenshot and the Wireshark Sniffer.

I use the 2.00.32 latest firmware.

You have any advice? It becomes an annoying problem and I am groping in the dark.

Best regards

Maurizio

PS: Should I I asked Belkin or is it always in the right place?

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http://about.me/mauriziotroilo

Hi, we use the WRP400 of the years and the voice module has always been problematic.

I have a theory on this problem: I think that the safety function to "Restrict the IP Source address" crashes after a few hours of regular work and it filters all incoming SIP messages.

You can confirm this idea by turning on the trace of the sip. In my case the trace shows all SIP entering until the reboot request.

Can I ask you how many CPES you have?

What is the frequency of this problem?

In our network, we have about 2000 installed platform and we must restart on unit 2-3 per day.

Kind regards.

Tags: Cisco Support

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