For a TDM PSTN trunk, Cisco's example routes calls through loop-back SIP dial-peers using translation rules that add and strip call routing tags A1A and A2A, so the Webex-facing leg stays SIP-to-SIP.

Checked 2026-10-02

Uses regular expressions defined in rules to add or remove call routing tags
Vendor
Cisco
Product
Webex Calling Local Gateway
Subsystem
tdm-pstn
Deployment
multi-tenant
Region
not restricted
Release range
current as of 2026-10-02
Checked
2026-10-02

Sources

Cite this note

APA

WarmTransfer. (2026, October 2). Webex Calling Local Gateway IOS XE command reference: source note webex-lgw-ios-xe-command-reference-tdm-loopback-tags. WarmTransfer. https://warmtransfer.net/knowledge/claims/webex-lgw-ios-xe-command-reference-tdm-loopback-tags

BibTeX

@misc{warmtransfer-claim-webex-lgw-ios-xe-command-reference-tdm-loopback-tags,
  title  = {Webex Calling Local Gateway IOS XE command reference: source note webex-lgw-ios-xe-command-reference-tdm-loopback-tags},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/webex-lgw-ios-xe-command-reference-tdm-loopback-tags},
  note   = {Source note webex-lgw-ios-xe-command-reference-tdm-loopback-tags, checked 2026-10-02}
}

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