Compatible after Changes, Hardware Revision B Only
Disable SIP ALG
This applies to Hardware Revision B only. Other hardware revisions are not compatible with VoIP as they do not have the disable SIP ALG option.This router has known issues with VoIP services if SIP ALG is not disabled. We recommend disabling the SIP ALG setting on the router available in firmware releases 2.2.4 and higher. This option is available within the firewall settings under the ‘Application Level Gateway (ALG) Configuration. The SIP option should be unchecked.