Hello, I have a weird problem with one TA-900 on my switch. Other TA-900s are working fine. Inbound calls to the TA from Broadworks fail with a SIP timeout. The INVITE is hitting the TA but it isn't responding with a 100 Trying. If I force the TA to re-register the FXS ports inbound calls start working for a short period of time (couple minutes) If a FXS user makes an outbound call it works and inbound calls work for a short period of time. I have packet captures from the adtran (debug ip packet <filter> dump) showing the INVITE coming in from Broadworks (Acme SD actually) When I enable SIP debugging on the TA I don't see anything in the terminal for the INVITE, like the TA isn't treating the traffic as local When phones are working (after outbound call) I see debug traffic like I would expect. This screams of a NAT issue but the TA is directly connected with a T1 and a real IP (no NAT). The registration in the acme shows no NAT and the registration expire timer is 3600 seconds. The Adtran is configured for NAT for its internal eth0/0 port and I have one linksys phone connected internally. The linksys phone appears as behind NAT in the acme with a 30 second registration timer. The linksys phone works fine through the whole process. Anyone see any issues like this before? Firmware Version A4.08.00.E -- Matthew S. Crocker President Crocker Communications, Inc. PO BOX 710 Greenfield, MA 01302-0710 http://www.crocker.com P: 413-746-2760