cisco 2651XM router
four ip phones:7940G
I have four 7940 phones, two of which (ephone 3 and 4) I use to make PSTN calls over sip trunk. In order for the two phones to be able to call out, both have to be configured with my sip number, but the problem is that when I get an incoming sip call both ephone-4 and ephone-3 rings (naturally) and I'd like it to be that only ephone 3 rings, but both can call out.
attached is the ephone section of my running config. Thanks for any advice.