Agree. 503 has become badly misused. On Oct 20, 2015, at 22:48, Alex Balashov <abalashov at evaristesys.com> wrote: ?Thanks. And I'm guessing the best one can hope for from a SIP termination provider is an ambiguous 404, or, more likely, a 503, which seems to have become misused an opaque, catch-all epithet for any and all completion failures? -- Alex Balashov | Principal | Evariste Systems LLC 303 Perimeter Center North, Suite 300 Atlanta, GA 30346 United States Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/ Sent from my BlackBerry. _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops