Source note · Trunks route groups and dial plans in Control Hub
A certificate-based trunk address must resolve from the public internet through a DNS A record or a DNS SRV record; an FQDN must resolve to an A record and not to a CNAME, an SRV service type must carry the prefix _sips._tcp, and Cisco prefers a time to live of 300 seconds or higher on all record types.
Checked 2026-09-15
- Vendor
- Cisco
- Product
- Webex Calling
- Subsystem
- Trunks
- Deployment
- not restricted
- Region
- not restricted
- Release range
- not restricted
- Checked
- 2026-09-15
Sources
- Configure trunks, route groups, and dial plans for Webex Calling — Cisco Systems, Inc. (Webex Help Center) · tier 2 current vendor documentation · Add a certificate-based trunk to a location, Before you begin, DNS configuration
Cite this note
APA
WarmTransfer. (2026, September 15). Trunks route groups and dial plans in Control Hub: source note wxtrk-certificate-trunk-dns-record-rules. WarmTransfer. https://warmtransfer.net/knowledge/claims/wxtrk-certificate-trunk-dns-record-rules
BibTeX
@misc{warmtransfer-claim-wxtrk-certificate-trunk-dns-record-rules,
title = {Trunks route groups and dial plans in Control Hub: source note wxtrk-certificate-trunk-dns-record-rules},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/wxtrk-certificate-trunk-dns-record-rules},
note = {Source note wxtrk-certificate-trunk-dns-record-rules, checked 2026-09-15}
}