Cisco Unified Border Element Configuration Guide - Cisco IOS XE 17.6 Onwards: SIP Enhanced 180 Provisional Response Handling

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/cube/ios-xe/config/ios-xe-book/m_voi-sip-enhance180-prov.html

Published

2026-04-25

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

Cisco documentation terms; no-redistribution; short excerpts and locators only

Source notes citing this source

• On a Cisco gateway or CUBE, a 183 with SDP from a far end that then sends no audio will likely leave the caller with silence rather than local ringback, because the 183 always gets cut-through and 180-based local ringback is not triggered. inferred in context
• On Cisco IOS/IOS XE gateways and CUBE, a 180 response without SDP gets local ringback, and the Enhanced 180 feature does not change that. in context
• On Cisco IOS/IOS XE gateways and CUBE, early media cut-through is the default treatment for a SIP 180 response that carries SDP. in context
• On Cisco IOS/IOS XE gateways and CUBE, a 183 response with SDP always gets early media cut-through; the disable-early-media 180 setting does not affect it. in context

Cite this source record

APA

WarmTransfer. (2026, April 25). Cisco Unified Border Element Configuration Guide - Cisco IOS XE 17.6 Onwards: SIP Enhanced 180 Provisional Response Handling. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-cube-enhanced-180-handling

BibTeX

@misc{warmtransfer-cisco-cube-enhanced-180-handling,
  title  = {Cisco Unified Border Element Configuration Guide - Cisco IOS XE 17.6 Onwards: SIP Enhanced 180 Provisional Response Handling},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-cube-enhanced-180-handling},
  note   = {Cisco Systems, accessed 2026-09-24}
}