Source note · Emergency callback numbers in Webex Calling
933 is a North American emergency test number that tests 911 configuration without reaching a PSAP, and many PSTN providers answer it with an IVR that reads back the ECBN and emergency service address.
Checked 2026-09-25
Many PSTN providers provide an IVR that repeats the ECBN and Emergency Service Address.
- Vendor
- Cisco
- Product
- Webex Calling
- Subsystem
- emergency-calling
- Deployment
- multi-tenant
- Region
- us and canada
- Release range
- current as of 2026-09-25
- Checked
- 2026-09-25
Sources
- Emergency Callback Number (ECBN) in Control Hub — Cisco Systems, Inc. (help.webex.com) · tier 2 current vendor documentation · 'Configure a user's number as ECBN' (933 note)
Cite this note
APA
WarmTransfer. (2026, September 25). Emergency callback numbers in Webex Calling: source note webex-calling-ecbn-933-ivr-readback. WarmTransfer. https://warmtransfer.net/knowledge/claims/webex-calling-ecbn-933-ivr-readback
BibTeX
@misc{warmtransfer-claim-webex-calling-ecbn-933-ivr-readback,
title = {Emergency callback numbers in Webex Calling: source note webex-calling-ecbn-933-ivr-readback},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/webex-calling-ecbn-933-ivr-readback},
note = {Source note webex-calling-ecbn-933-ivr-readback, checked 2026-09-25}
}