Disable sip alg on a P660H-D1 - Zyxel P660HW-D1 Router

Might be a firewall setting in your router. See if you can change the SIP ALG setting. If it is off, you need to turn it on.

Here is a site that will help you identify the SIP ALG in your router:
http://www.nextiva.com/support/how-do-i-identify-sip-alg.html.

What system you're running on?

If the problem is in internet explorer go to View, Internet Options, and on the advanced tab check the box that says "Disable automatic SIP"

IT does Security • SIP Authentication with Password Encryption • Configuration Download Using HTTPS and SSL/TLS Clients Certification Encryption and Authentication • VoIP NAT Traversal (SIP/STUN) • NAT/Firewall (NAPT, TCP/UDP, DMZ, ALGs) • VPN Pass-Through • Packet Filtering by IP Address, Port Number, and Protocol

Zyxel routers don't support Nat 2 confirgurations for the PS3 software. You can fix some issues by powrforwarding the speciffic ports that the PSN uses. To do so follow this ismple guide:
http://portforward.com/english/routers/port_forwarding/ZyXEL/P-660HW-D1/PlayStation_Network.htm


It may vary from game to game so you should choose what speciffic product are you trying to use here:
http://portforward.com/english/routers/port_forwarding/ZyXEL/P-660HW-D1/P-660HW-D1index.htm

connect to the modem through telnet and type
application unbind SIP 5060 saveall

I answered this here:

http://www.fixya.com/support/t1064759-nat_3_in_ps3_router_zyxel_p_660hw_t1_v2

Hi, man.
There are many things to consider in this type of application.
when calling from PSTN to IP using analog lines from time to time you will have this type of event, I suggest working with H323 protocol, this will tone down a bit your problem.
If you want optimum performance, you should use a DID with the channels you need and address to your PBX SIP FreeSwitch. The DIDs are cheaper and are digital which eliminates random connectivity problems in the incoming call.
Once you have directed the DID you tell your server to transfer the call to the IVR using your internal dialing plan.

Lucky

while your computer is directly connected to the router, try to change the channel to 1,6 or 11. Try to enable wireless security and disable firewall on your computer. try to turn off other wireless device that may cause interference on your network

This in it's most basic description means that the phone is unable to register with the SIP server, most likely for lack of internet connectivity or a firewall blocking the packets.

If you've verified connectivity and opened the proper ports and the phone fails to initialize and still getting “URL Call Disabled” or all of the above parameters are correct, update the firmware for the router. This can usually be done within the router configuration. Then reboot in order, the cable modem or DSL, the router or switch, then the phone. This may solve the problem.

If still having the same issue, confirm in the router configuration for settings such as SIP proxy, gateway, or application layer or any configuration setting for SIP or VOIP. If any of these do exist, make sure they are turned off as these may only confuse or adversely affect many implementations.