Grandstream WP810 Wireless SIP phone
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I bought one of these phones to try for our receptionist as a secondary phone for roaming around the building when she needs to.
The only issue I am having is that occassionally the phone will not respond timely to the sip server. The most obvious way I see this is just with a continuous ping. As long as a call is active I get consistent sub 5ms ping times. However, if a call is not active then the ping response will vary but will range from 50ms to 3000ms. This is very repeatable.
When in this mode the phone will sometimes not respond to an incoming call before the sip server abandons trying to reach it. I've had several times where I will dial the extension and the calling phone will hear two rings and then a busy. However after the busy, the Grandstream will ring. I think this tells me that it did receive the SIP message to begin the call but didn't respond in time before the server abandoned it.
I thought maybe there would be a keep alive type setting on the phone that I could shorten to keep it connected but I haven't found it in the settings.
Has anyone ever used one of these and experienced similar?
