Source note · Troubleshooting calls that drop on hold or transfer
midcall-signaling block blocks all mid-call media-related signaling to the SIP trunk, rejects video escalation and T.38, and Cisco says to configure it only when basic calling is the focus and mid-call signaling can be consumed.
Checked 2026-09-30
- Vendor
- Cisco
- Product
- Cisco Unified Border Element
- Subsystem
- midcall-signaling
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Cisco IOS XE 17.6 onwards
- Checked
- 2026-09-30
Sources
- Cisco Unified Border Element Configuration Guide - Cisco IOS XE 17.6 Onwards - Mid-call Signaling — Cisco Systems · tier 2 current vendor documentation · Mid-call Signaling Block
Cite this note
APA
WarmTransfer. (2026, September 30). Troubleshooting calls that drop on hold or transfer: source note sip-reinvite-call-drops-cube-block. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-reinvite-call-drops-cube-block
BibTeX
@misc{warmtransfer-claim-sip-reinvite-call-drops-cube-block,
title = {Troubleshooting calls that drop on hold or transfer: source note sip-reinvite-call-drops-cube-block},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-reinvite-call-drops-cube-block},
note = {Source note sip-reinvite-call-drops-cube-block, checked 2026-09-30}
}