Chapter 42: Call-Setup Failures

Publisher

SignalWire (FreeSWITCH documentation)

URL

https://developer.signalwire.com/freeswitch/troubleshooting/call-setup/

Published

unknown

Updated

unknown

Accessed

2026-10-02

HTTP status

200

License

FreeSWITCH documentation terms (not confirmed); no-redistribution; short excerpts and locators only

Source notes citing this source

• FreeSWITCH documentation says that when an upstream provider answers an INVITE with 404 the fix lies upstream, as the 404 is a number the provider does not recognise. in context
• FreeSWITCH maps a received SIP 404 Not Found to hangup cause UNALLOCATED_NUMBER rather than NO_ROUTE_DESTINATION. in context
• FreeSWITCH maps a received SIP 484 Address Incomplete to hangup cause INVALID_NUMBER_FORMAT. in context

Cite this source record

APA

WarmTransfer. (2026, October 2). Chapter 42: Call-Setup Failures. WarmTransfer. https://warmtransfer.net/knowledge/sources/signalwire-freeswitch-call-setup-failures

BibTeX

@misc{warmtransfer-signalwire-freeswitch-call-setup-failures,
  title  = {Chapter 42: Call-Setup Failures},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/signalwire-freeswitch-call-setup-failures},
  note   = {SignalWire (FreeSWITCH documentation), accessed 2026-10-02}
}