Source note · International phone number requirements
For Cisco Calling Plans, an Emergency Service Address is mandatory in PSTN setup and applies by default to all numbers at the location; per-number ESA customisation is only available when the user is in the US or Canada.
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Webex Calling - Cisco Calling Plan
- Subsystem
- emergency service address
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-25
- Checked
- 2026-09-25
Sources
- Get Started with the Cisco Calling Plans — Cisco Systems, Inc. (Webex Help Center) · tier 2 current vendor documentation · Emergency Service Address section
Cite this note
APA
WarmTransfer. (2026, September 25). International phone number requirements: source note international-number-requirements-cisco-esa-mandatory. WarmTransfer. https://warmtransfer.net/knowledge/claims/international-number-requirements-cisco-esa-mandatory
BibTeX
@misc{warmtransfer-claim-international-number-requirements-cisco-esa-mandatory,
title = {International phone number requirements: source note international-number-requirements-cisco-esa-mandatory},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/international-number-requirements-cisco-esa-mandatory},
note = {Source note international-number-requirements-cisco-esa-mandatory, checked 2026-09-25}
}