On some IOS XE releases (reported from 16.12.6 / 17.3.5 / 17.6.1), an outbound dial peer configured with both session server-group and sip options-keepalive is busied out and CUBE answers the caller with 503 instead of sending an INVITE; Cisco tracks this as CSCvx92872.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Cisco Unified Border Element
- Subsystem
- server groups
- Deployment
- on-premises
- Region
- not restricted
- Release range
- affected from 16.12.6 / 17.3.5 / 17.6.1; fixed in 16.12.8 / 17.3.6 / 17.6.3 / 17.7.1 / 17.8.1
- Checked
- 2026-09-24
Sources
- Troubleshoot Busyout Dial Peers on CUBE or IOS Voice Gateway — Cisco Systems · tier 2 current vendor documentation · Problem; Root Cause; Workaround sections
Cite this note
APA
WarmTransfer. (2026, September 24). CUBE dial-peer matching and voice class URI and translation profiles: source note cube-dial-peers-busyout-defect-cscvx92872. WarmTransfer. https://warmtransfer.net/knowledge/claims/cube-dial-peers-busyout-defect-cscvx92872
BibTeX
@misc{warmtransfer-claim-cube-dial-peers-busyout-defect-cscvx92872,
title = {CUBE dial-peer matching and voice class URI and translation profiles: source note cube-dial-peers-busyout-defect-cscvx92872},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cube-dial-peers-busyout-defect-cscvx92872},
note = {Source note cube-dial-peers-busyout-defect-cscvx92872, checked 2026-09-24}
}