A phone system you can hold in one hand.

Desk phones, browsers, trunks, voicemail, queues and call records, from a single binary with no database to install and no restarts. Ever.

Install it Read the code

$ docker run -d --network host -v sidetone-data:/data ghcr.io/enetideas/sidetone
$ docker logs sidetone

Admin API token (shown once, store it now):

    sidetone_…

time=09:22:14 level=INFO msg="sip listening" network=udp addr=[::]:5060
time=09:22:14 level=INFO msg="api listening" addr=127.0.0.1:8080

That is the whole install. The first start creates the database and prints an administrator's token once; the console is at http://127.0.0.1:8080/ on the same listener. Prefer a plain binary? There are three ways to run it.

The console

Everything it does, curl can do.

The web console is part of the binary. It is only a client of the REST API, with no build step and nothing loaded from anywhere else, so there is nothing it can do that a script cannot.

The sidetone console: a dashboard of calls in progress, phones online, queues, voicemail and trunks, with a sidebar of every section — The dashboard of a running server. A new server starts in test mode, and says so above every page, until an operator says the telephones are in service.

The same dashboard in the console's dark theme — The dashboard of a running server. A new server starts in test mode, and says so above every page, until an operator says the telephones are in service.

Three things

Small enough to understand. Real enough to rely on.

Kamailio, OpenSIPS, Asterisk and FreeSWITCH are powerful and heavy. If you want phones to call each other, reach a trunk and leave a record, most of that is unused cost. sidetone is the part you use.

A phone system you can hold in one hand.

Everything it does, curl can do.

Small enough to understand. Real enough to rely on.

It is one file

It is a real phone system

It changes while it runs