Source note · Calls that drop after about 30 seconds

The CUBE 'session refresh' command under voice service voip / sip adds a Session-Expires header to outbound INVITEs when the inbound INVITE did not carry one.

Checked 2026-09-25

Vendor: Cisco
Product: Cisco Unified Border Element
Subsystem: session timer
Deployment: on-premises
Region: not restricted
Release range: as documented 2018-10-18
Checked: 2026-09-25

Sources

Troubleshoot Session Refresh on CUBE — Cisco · tier 2 current vendor documentation · Configuration section on session refresh

Cite this note

APA

WarmTransfer. (2026, September 25). Calls that drop after about 30 seconds: source note sip-calls-drop-30-seconds-cube-session-refresh-cmd. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-calls-drop-30-seconds-cube-session-refresh-cmd

BibTeX

@misc{warmtransfer-claim-sip-calls-drop-30-seconds-cube-session-refresh-cmd,
  title  = {Calls that drop after about 30 seconds: source note sip-calls-drop-30-seconds-cube-session-refresh-cmd},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/sip-calls-drop-30-seconds-cube-session-refresh-cmd},
  note   = {Source note sip-calls-drop-30-seconds-cube-session-refresh-cmd, checked 2026-09-25}
}

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