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<div>We struggled with this and eventually integrated our switch with Speedeon Data. They have a disconnected number scrubbing API. We sell it as an additional feature to customers who are interested in knowing when numbers are disconnected. <br>
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On Oct 20, 2015, at 7:39 PM, Alex Balashov <<a href="mailto:abalashov@evaristesys.com">abalashov@evaristesys.com</a>> wrote:<br>
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<div>ýHello,</div>
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<div>Are there ISUP cause codes for disconnected numbers? And if so, do there exist established mappings for them to SIP?</div>
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<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 ýby a rather generic SIP negative final response and reason. However,
I'd be remiss not to ask!</div>
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<div>Thanks!</div>
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<div>--<br>
Alex Balashov | Principal | Evariste Systems LLC<br>
303 Perimeter Center North, Suite 300<br>
Atlanta, GA 30346<br>
United States<br>
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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>
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Sent from my BlackBerry.</div>
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