Hi There,

I am attempting to connect a 2 Port FXS ATA box to a Quadro 2X as a remote extension. (as opposed to an IP Phone). After the ATA registers, the Quadro sends a SUBSCRIBE request (Event: dialog)to the ATA. On a well behaved ATA a SIP/2.0 501 Not Implemented message is sent and the quadro is happy till the next register event when it also send a SUBSCRIBE request again!

On Some ATA's the Subscribe message is ignored and the Quadro just Keeps sending SUBSCRIBE requests every second or so all the time! On some ATA's this constant Subscribe message will eventually lock it up.

Is there a way to disable Subscribe for some IP Phone registrations?