This can cause failed transfers, dead air upon call retrieval, among other issues.ĭNS Proxying: If the DNS server being used is not up to date and consistent, devices (Poly phones in particular) can become deregistered. Since all phones are likely using port 5062, the data spike causes packets to be dropped. Basically, data coming into the network is sent out to all devices on the network.

Without multicasting enabled, you can have what’s called “port collisions”. UDP Session Integrity: When a call comes into a Call Group and simultaneously rings all phones, the Internet traffic of the internal network spikes. If the device is reset, the original issues will return. ISP Controlled Device Management: The device is managed by the ISP, and neither you nor Nextiva are made aware of these changes. SIP ALG is enabled by default on the Arris DG1670A, and while SIP ALG and DNS Proxy can be disabled, doing so does not always resolve audio quality issues. SIP ALG inspects and modifies SIP traffic in unexpected ways causing one-way audio, deregistrations, random error messages when dialing and calls going to voicemail for no reason. SIP ALG: Nextiva uses port 5062 to bypass SIP ALG, however, having this disabled is always recommended. There are four main areas that you should be concerned with regarding your network. If you have more devices on your network than ports on your router, you can connect a switch to your router to expand the number of ports. The ideal network involves your Internet Service Provider (ISP) connecting onsite to a stand-alone modem that connects to a router, preferably a router recommended by Nextiva.

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