I have 9 SPA504G phones. All of them can receive blind transfers except 1 from our Patten PSTN gateway. If any other phone does a blind transfer to this phone it fails with the following in the logs. Leg L:2418.4[Extn] is terminated: Cause: 406 Not Acceptable/INVITE from 192.168.XXX.XXX:5060 L:2418.1[Line:XXXX<<anonymous] failed to reach Extn:XXXX, reason Not Acceptable HereReason Unknown The configs and firmware for all the phones appear to be the same. Any thoughts? Thanks in advance!