Synway Syn_PBX100 U100, User Manual, Page: 73 / 132

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4.12 Web Extensions
Web Extension is a new feature that makes use of WebRTC technology. You can use any web
browser that supports WebRTC to register an extension number to yourSyn_PBX system without
any plugins.
To register the first Web extensions please follow the steps below:
Step 1 :
Create a Web Extension
To create a web extension, navigate to web menu Advanced->Web Extensions . Click on “ New
User ” button to add a new web extension.

Name : Username of this web extension.

Extension : Extension number of this web extension.

Password : Password for registration of this web extension.

Outbound CID :Only works if the call was placed out through VoIP trunks.

DialPlan : Defines which type of numbers the web extension can dial.

Transport : WS or WSS.

WS : WS (WebSocket) Protocol which is an independent TCP-based protocol providing
full-duplex communication channels over a single TCP connection. The WebSocket protocol
was standardized by the IETF as RFC 6455 in 2011, and the WebSocket API in Web IDL is
being standardized by the W3C.

WSS : WSS (WebSockets over SSL/TLS), like HTTPS, WSS is encrypted and we strongly
recommend the secure wss:// protocol over the insecure ws:// transport. A variety of
attacks against WebSockets are almost impossible if the transport is secured.
Step 2 :
Upgrade Web extension patch
As you can see, web extensions use different protocols for signaling and media (WS/WSS) and
they are not ordinary SIP/IAX2 extension that can use IP phones or softphones to register so must
be treated differently.
Download WebRTC patch from the links below:
U20V2:
http://Synway.com/html/U20_V2.html
U50V2: http://Synway.com/html/U50_V2.html