Source note · Setting up Zoom Phone local survivability with Zoom Node

The ZPLS service uses TCP 9443 toward other ZPLS nodes and the Call Bridge for signalling, media and data synchronisation between nodes and node groups.

Checked 2026-10-01

Vendor: Zoom
Product: Zoom Phone Local Survivability
Subsystem: firewall
Deployment: hybrid
Region: not restricted
Release range: current as of 2026-10-01
Checked: 2026-10-01

Sources

Firewall requirements for Zoom Phone Local Survivability — Zoom Communications · tier 2 current vendor documentation · Firewall rules table - TCP 9443 row and asterisk note

Cite this note

APA

WarmTransfer. (2026, October 1). Setting up Zoom Phone local survivability with Zoom Node: source note zoom-phone-local-survivability-setup-fw-call-bridge. WarmTransfer. https://warmtransfer.net/knowledge/claims/zoom-phone-local-survivability-setup-fw-call-bridge

BibTeX

@misc{warmtransfer-claim-zoom-phone-local-survivability-setup-fw-call-bridge,
  title  = {Setting up Zoom Phone local survivability with Zoom Node: source note zoom-phone-local-survivability-setup-fw-call-bridge},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/zoom-phone-local-survivability-setup-fw-call-bridge},
  note   = {Source note zoom-phone-local-survivability-setup-fw-call-bridge, checked 2026-10-01}
}

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