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ERROR: This service requires JavaScript. Please enable JavaScript in your web browser settings. ERROR: This service requires WebRTC. Please try Mozilla Firefox or Google Chrome, using the latest version is strongly recommended. ERROR: JsCommunicator configuration not found ERROR: Failed to initialize user agent ERROR: SIP Registration failure ERROR: failed to start call, check that microphone/webcam are connected, check browser security settings, peer may not support compatible codecs
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SIP registration: Registered Not Registered
April 15, 2015

Disabling SIP ALG on Zyxel

Zyxel equipment is often deployed by DSL providers such as Qwest and Century Link. If you are using a VOIP telephone and experiencing call control or audio issues you may need to disable the SIP ALG feature.

1. Telnet into the router from your LAN.

2. Select menu 24.

3. Select menu 8.

4. To display current SIP ALG status type in “ip nat service sip active”.

5. If it returns a value of “1” the SIP is enabled.

6. To turn off the SIP ALG type in “ip nat service sip active 0″.

7. Reboot your VOIP phones.

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