Cisco documents that TDM ISDN circuits are supported with Webex Calling through a Cisco IOS XE Local Gateway with a TDM PSTN trunk.

Checked 2026-09-24

TDM (Time Division Multiplexing) ISDN circuits remain common and are fully supported by Webex Calling.
Vendor
Cisco
Product
Webex Calling Local Gateway
Subsystem
TDM PSTN trunk
Deployment
multi-tenant
Region
not restricted
Release range
current as of 2026-09-24
Checked
2026-09-24

Sources

Cite this note

APA

WarmTransfer. (2026, September 24). PRI and TDM gateway interworking: source note legacy-pri-tdm-wxc-tdm-supported. WarmTransfer. https://warmtransfer.net/knowledge/claims/legacy-pri-tdm-wxc-tdm-supported

BibTeX

@misc{warmtransfer-claim-legacy-pri-tdm-wxc-tdm-supported,
  title  = {PRI and TDM gateway interworking: source note legacy-pri-tdm-wxc-tdm-supported},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/legacy-pri-tdm-wxc-tdm-supported},
  note   = {Source note legacy-pri-tdm-wxc-tdm-supported, checked 2026-09-24}
}

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