SNOM messaging server

This project contains a proof-of-concept messaging-server for SMS-like communication between SNOM DECT-handsets.

This project has been developed against a M700 basestation (FW 0450.13), a M65 (FW 450.13) handset and a M70 (FW 450.11) handset. This project will probably work with other handsets, too.

This project uses the proprietary messaging-server interface provided by the M700 Basestations (see Webinterface -> Management -> Text Messaging). The protocol is completely reverse-engineered by wild guessing.

How to use it

I assume you have a working M700 setup (either multicell or not) with a few handsets configured and running. SNOM uses the primary extension assigned to a handset to route messages so you also need SIP configured and working.

Start the server on a machine that can be reached by the Basestations. The server will bind to 0.0.0.0:1300 (sorry, no IPv6 here!).

Now setup Text-Messaging in your M700:

• Text Messaging: "Enabled", Not "Enabled without server"(!)
• Text Messaging and Alarm Server: IP of the machine running our server.
• Text Messaging Port: 1300 (default)

Additionally (for development) I have set the following values. These seem to increase the rate of status updates. But your messaging will also work without it.

• Text Message Keep Alive: 1
• Text Messaging Response: 10
• Text Messaging TTL: 5
• Terminal Keep Alive: 1

Afterwards you need to reboot your DECT basestation (or for multicell all basestations in your chain).

The basestations will now start to send status messages to your server.

What it does

This project currently only implements messaging:

• Accept text messages from a phone and sent a confirmation to the sending phone.
• Accepted text messages are queued for delivery.
• Regularly the queue is checked for messages to deliver.
• If a message can not be delivered it is kept and resend later on.

What comes next

This project is meant as a platform to implement more functionality that is made available using this proprietary interface!

For example:

• SNOM's marketing claims the M70 can track bluetooth beacons. Is this information exposed using this interface?
• Also: SNOM's marketing claims that you can build automation on top of the alarm functionality of their devices, like opening doors. I bet this is also implemented using this interface ;)