SRTP pass-through is triggered only when the inbound INVITE carries an m= line with RTP/SAVP, and CUBE passes the crypto attributes, including suites it does not itself support, to the other leg unchanged.

Checked 2026-09-30

Vendor
Cisco
Product
Cisco Unified Border Element
Subsystem
SRTP pass-through
Deployment
on-premises
Region
not restricted
Release range
IOS XE 17.6 onwards book
Checked
2026-09-30

Sources

Cite this note

APA

WarmTransfer. (2026, September 30). Setting up TLS and SRTP on CUBE: source note cube-tls-srtp-setup-passthru-savp-trigger. WarmTransfer. https://warmtransfer.net/knowledge/claims/cube-tls-srtp-setup-passthru-savp-trigger

BibTeX

@misc{warmtransfer-claim-cube-tls-srtp-setup-passthru-savp-trigger,
  title  = {Setting up TLS and SRTP on CUBE: source note cube-tls-srtp-setup-passthru-savp-trigger},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/cube-tls-srtp-setup-passthru-savp-trigger},
  note   = {Source note cube-tls-srtp-setup-passthru-savp-trigger, checked 2026-09-30}
}

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