Source note · Setting up bring-your-own PSTN for Webex Contact Center
Cisco recommends turning off SIP ALG on firewalls in the Webex Calling path because some implementations break firewall traversal.
Checked 2026-09-30
- Vendor
- Cisco
- Product
- Webex Calling Local Gateway
- Subsystem
- Firewall
- Deployment
- on-premises
- Region
- not restricted
- Release range
- current as of 2026-09-30
- Checked
- 2026-09-30
Sources
- Port Reference Information for Webex Calling — Cisco · tier 2 current vendor documentation · SIP ALG note
Cite this note
APA
WarmTransfer. (2026, September 30). Setting up bring-your-own PSTN for Webex Contact Center: source note wxcc-byo-pstn-setup-sip-alg-off. WarmTransfer. https://warmtransfer.net/knowledge/claims/wxcc-byo-pstn-setup-sip-alg-off
BibTeX
@misc{warmtransfer-claim-wxcc-byo-pstn-setup-sip-alg-off,
title = {Setting up bring-your-own PSTN for Webex Contact Center: source note wxcc-byo-pstn-setup-sip-alg-off},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/wxcc-byo-pstn-setup-sip-alg-off},
note = {Source note wxcc-byo-pstn-setup-sip-alg-off, checked 2026-09-30}
}