Source note · Unified CM SIP trunks and security profiles
When the Local Gateway and the PSTN gateway are on the same device, Unified CM needs two trunks to it with different SIP listening ports, so it can tell Webex traffic from PSTN traffic and apply a different class of service to each.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Webex Calling Local Gateway (IOS XE) with Unified CM
- Subsystem
- LGW and Unified CM coexistence
- Deployment
- hybrid
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- Configure Local Gateway on Cisco IOS XE for Webex Calling — Cisco Systems, Inc. (Webex Help Center) · tier 2 current vendor documentation · Configure Local Gateway with an existing Unified CM environment (introductory paragraph)
Cite this note
APA
WarmTransfer. (2026, September 24). Unified CM SIP trunks and security profiles: source note cucm-sip-trunks-lgw-two-trunk-rationale. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-sip-trunks-lgw-two-trunk-rationale
BibTeX
@misc{warmtransfer-claim-cucm-sip-trunks-lgw-two-trunk-rationale,
title = {Unified CM SIP trunks and security profiles: source note cucm-sip-trunks-lgw-two-trunk-rationale},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-sip-trunks-lgw-two-trunk-rationale},
note = {Source note cucm-sip-trunks-lgw-two-trunk-rationale, checked 2026-09-24}
}