Draytek - Disable SIP ALG

To disable SIP ALG telnet into the router and enter the following command.

1. > sys sip_alg 0 -- Disables sip alg

2. > sys commit -- Apply changes

3. > sys reboot -- Reboot router

Once router is back online, reboot the IP phones or PBX.

To re-enable SIP ALG run the following command:

sys sip_alg 1 -- enables sip alg