Source note · SIP 503 and trunk out-of-service failures
CUBE marks a dial peer busyout only when every destination in the dial peer (for example every target in its server group) has a heartbeat failure.
Checked 2026-09-25
a dial-peer is marked as busyout, only if all the destinations in the dial-peer have a heartbeat failure.
- Vendor
- Cisco
- Product
- CUBE
- Subsystem
- SIP trunk monitoring
- Deployment
- on-premises
- Region
- not restricted
- Release range
- IOS XE 17.6 onwards
- Checked
- 2026-09-25
Sources
- Cisco Unified Border Element Configuration Guide - Cisco IOS XE 17.6 Onwards - SIP Trunk Monitoring — Cisco · tier 2 current vendor documentation · SIP Trunk Monitoring chapter, server group and DNS SRV subsections
Cite this note
APA
WarmTransfer. (2026, September 25). SIP 503 and trunk out-of-service failures: source note sip-503-trunk-failures-cube-busyout-all-dest. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-503-trunk-failures-cube-busyout-all-dest
BibTeX
@misc{warmtransfer-claim-sip-503-trunk-failures-cube-busyout-all-dest,
title = {SIP 503 and trunk out-of-service failures: source note sip-503-trunk-failures-cube-busyout-all-dest},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-503-trunk-failures-cube-busyout-all-dest},
note = {Source note sip-503-trunk-failures-cube-busyout-all-dest, checked 2026-09-25}
}