Chapter 9: WebRTC with Verto | FreeSWITCH Users Manual

Publisher

SignalWire

URL

https://developer.signalwire.com/freeswitch/users-and-endpoints/verto/

Published

unknown

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

SignalWire documentation site terms; no open licence stated on page; no-redistribution; short excerpts and locators only

Source notes citing this source

• Verto WSS takes a single combined PEM file via the secure-combined parameter, typically $${certs_dir}/wss.pem; DTLS-SRTP media uses a separate dtls-srtp.pem. in context
• Verto is a FreeSWITCH signalling protocol of JSON-RPC over WebSocket that lets browser and other WebRTC endpoints register with FreeSWITCH and make and receive calls without a SIP stack. in context
• Verto authenticates users against the existing FreeSWITCH directory XML user database. in context
• Verto needs mod_rtc and mod_verto both loaded in modules.conf.xml, with mod_rtc listed first; it is configured in verto.conf.xml. in context
• The standard Verto profile is named default-v4 and conventionally listens for plain WebSocket on port 8081 and secure WebSocket (WSS) on 8082; a bind-local marked secure="true" makes a WSS binding. in context
• Verto uses the same core media engine (mod_rtc plus switch_core_media) as SIP over WSS, so both share the same DTLS-SRTP and ICE media path. in context

Cite this source record

APA

WarmTransfer. (2026, September 24). Chapter 9: WebRTC with Verto | FreeSWITCH Users Manual. WarmTransfer. https://warmtransfer.net/knowledge/sources/signalwire-fs-manual-verto

BibTeX

@misc{warmtransfer-signalwire-fs-manual-verto,
  title  = {Chapter 9: WebRTC with Verto | FreeSWITCH Users Manual},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/signalwire-fs-manual-verto},
  note   = {SignalWire, accessed 2026-09-24}
}