<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div></div><div>For what it's worth, here's the RFC that maps the codes:</div><div><br></div><div><a href="https://tools.ietf.org/html/rfc3398">https://tools.ietf.org/html/rfc3398</a></div><div><br></div><div><br></div><div><br>On Oct 20, 2015, at 21:38, Alex Balashov <<a href="mailto:abalashov@evaristesys.com">abalashov@evaristesys.com</a>> wrote:<br><br></div><div><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><style> body { font-family: "Calibri","Slate Pro","sans-serif"; color:#262626 }</style> <div>Hello,</div><div><br></div><div>Are there ISUP cause codes for disconnected numbers? And if so, do there exist established mappings for them to SIP?</div><div><br></div><div>I've never seen this present from any SIP termination gateway. As far as I know, disconnects are expressed in in-band audio service announcements fed backward via early media, followed by a rather generic SIP negative final response and reason. However, I'd be remiss not to ask!</div><div><br></div><div>Thanks!</div><div><br></div><div style="display:none"></div><div>--<br>Alex Balashov | Principal | Evariste Systems LLC<br>303 Perimeter Center North, Suite 300<br>Atlanta, GA 30346<br>United States<br><br>Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct)<br>Web: <a href="http://www.evaristesys.com/">http://www.evaristesys.com/</a>, <a href="http://www.csrpswitch.com/">http://www.csrpswitch.com/</a><br><br>Sent from my BlackBerry.</div>
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