Source note · Setting up TLS and SRTP on CUBE

When transport tcp tls is configured under sip-ua without a version, CUBE negotiates TLS 1.2 and 1.3; from IOS XE 26.1.1, TLS 1.0 and 1.1 are excluded from that default.

Checked 2026-09-30

Vendor: Cisco
Product: Cisco Unified Border Element
Subsystem: SIP TLS
Deployment: on-premises
Region: not restricted
Release range: IOS XE 26.1.1 and later for the exclusion of 1.0 and 1.1
Checked: 2026-09-30

Sources

Cisco Unified Border Element Configuration Guide - Cisco IOS XE 17.6 Onwards - SIP TLS Support — Cisco · tier 2 current vendor documentation · SIP TLS Support > Global SIP-UA configuration > TLS version modes (Default)

Cite this note

APA

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

BibTeX

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

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