When using a VoIP phone with the SBG6700-AC, the SIP Passthrough option in the SBG6700-AC may need to be enabled in order for that phone to have full functionality. Â In other situations, it may be recommended by the VoIP phone manufacturer to disable SIP Passthrough. Â By default, SIP Passthrough is enabled. Â This document describes how to enable and SIP Passthrough in the SBG6700-AC.
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NOTE: If it is not known if SIP Passthrough should be enabled or disabled, please contact the VoIP phone manufacturer.
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To Enable SIP Passthrough
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Launch a Firefox or Safari browser. Â EnterÂ
http://192.168.0.1Â into the address box, and press theÂ
Enter key. Â
NOTE: A browser message on Chrome, Edge, Firefox, and Opera, may appear when accessing the Web Manager. Â The message includes 1
92.168.01 uses an unsupported protocol and ERR_SSL_VERSION_OR_CIPHER_MISMATCH. Â The Web Manager uses an earlier version of the TLS protocol and does not match the version allowed by the web browser. Â Safari browsers on Apple PC and mobile devices are not impacted. Â The workaround to access the Web Manager with a PC is to use the Firefox browser and set the TLS version to 1. Â For workaround instructions refer to article #Â
19435 - 192.168.0.1 uses an unsupported protocol.Â
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- A security or private risk alert may appear on the web browser advising users to proceed with caution when accessing the Web Manager. Â There is no risk in proceeding to the Web Manager. Â For instructions to bypass the alert screen, refer to article #Â 18181 - Alert Message for Web Manager Access.
 - On the Login page, enter admin or a customized username in the Username field.
 - Enter password or a customized password in the Password field.
NOTE: On later versions of the SBG6700-AC, the Wi-Fi Security Key is used as the default admin password printed on the bottom white label. For assistance with Web Manager Access, refer to article # 18754 – SBG6700-AC: Web Manager Access.
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Click the Login button. The Home page will appear.
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- Move the mouse cursor over the Advanced tab and select the Options sub-link. Â The Advanced - Options page will appear.
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On the Advanced Options page, NAT ALG Status section:
a. Â SIP - Check Enable.
b. Â Click the Apply button.
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