Show HN: A minimal demo of SIP ↔ WebRTC

#1

Post by techyKerala » Thu, Oct 09, 2025, 12:06 PM UTC

A minimal demo of SIP ↔ WebRTC. This example shows how a WebRTC browser client can register, call, and communicate through a SIP signaling server.

Show HN: A minimal demo of SIP ↔ WebRTC
github.com

Re: Show HN: A minimal demo of SIP ↔ WebRTC

#2

Post by Sean-Der » Thu, Oct 09, 2025, 3:03 PM UTC

Nice job on this :)

I think it’s really fun how it’s all the same underlying protocols. Makes it easy to bridge these two protocols you would assume are dramatically different!

Re: Show HN: A minimal demo of SIP ↔ WebRTC

#3

Post by techyKerala » Thu, Oct 09, 2025, 5:14 PM UTC

Sean-Der wrote: post #2

Nice job on this :) I think it’s really fun how it’s all the same underlying protocols. Makes it easy to bridge these two protocols you would assume are dramatically different!

Yes, both share the same base protocol, I just wanted to play around with it for fun.

I noticed that in SIP, when a device sends an offer with sendrecv, the gateway responds correctly, but if I try sendonly or recvonly, it doesn’t seem to work only sendrecv works. I’m not sure why yet, so I’ll need to dig into it more.

Re: Show HN: A minimal demo of SIP ↔ WebRTC

#4

Post by techyKerala » Thu, Oct 09, 2025, 5:16 PM UTC

techyKerala wrote: post #3

Sean-Der wrote: post #2

Nice job on this :) I think it’s really fun how it’s all the same underlying protocols. Makes it easy to bridge these two protocols you would assume are dramatically different!

Yes, both share the same base protocol, I just wanted to play around with it for fun. I noticed that in SIP, when a device sends an offer with sendrecv, the gateway responds correctly, but if I try sendonly or recvonly, it doesn’t seem to work only sendrecv works. I’m not sure why yet, so I’ll need to dig into it more.

I am testing with Polycom app IOS may be it wont handle it