I’m trying to get a SIP circuit to register, but the SB8200 (used with Xfinity) is blocking something. When I switch to my AT&T circuit, the SIP comes up just fine. Is there a manual for this device? I can’t seem to find one.
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SB8200 is just a cable modem it doesn't have any advanced configuration such as SIP etc. so that can done only on the router interface or GUI or on the combination unit so please do check with your router manufacturer to setup SIP.
what router do you have connected to the SB8200? Whats the SIP circuit? The actual device you’re using?
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