Cisco states a single registration-based Local Gateway supports up to 250 concurrent calls, and certificate-based connectivity can support more, up to 6500 depending on connectivity type and SBC model.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Local Gateway
- Subsystem
- interconnect
- Deployment
- on-premises
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- Prepare to migrate from Unified CM to Webex Calling — Cisco Systems, Inc. (Webex Help Center) · tier 2 current vendor documentation · Prepare to migrate > PSTN connectivity
Cite this note
APA
WarmTransfer. (2026, September 24). Unified CM and Webex Calling coexistence during a migration: source note cucm-webex-calling-coexistence-lgw-reg-capacity. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-webex-calling-coexistence-lgw-reg-capacity
BibTeX
@misc{warmtransfer-claim-cucm-webex-calling-coexistence-lgw-reg-capacity,
title = {Unified CM and Webex Calling coexistence during a migration: source note cucm-webex-calling-coexistence-lgw-reg-capacity},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-webex-calling-coexistence-lgw-reg-capacity},
note = {Source note cucm-webex-calling-coexistence-lgw-reg-capacity, checked 2026-09-24}
}