TG2SIP is a Telegram<->SIP voice gateway. It can be used to forward incoming telegram calls to your SIP PBX or make SIP->Telegram calls.

Your SIP PBX should be comaptible with L16@48000 or OPUS@48000 voice codec.

1. Obtain binaries in one of convenient ways for you.

   • Build them from source.
     Requires C++17 supported comiler, which may be a trouble for old linux distros.
   • Download prebuild native binaries for one of supported distros.
     Prebuild binaries requires OPUS libraries (libopus0 for Ubuntu, opus for CentOS, etc).
   • Download universal AppImage package.
     More information of what is AppImage can be found here https://appimage.org/

2. Obtain api_id and api_hash tokens from this page and put them in settings.ini file.

3. Login into telegram with gen_db app

4. Set SIP server settings in settings.ini

5. Run tg2sip

SIP->Telegram calls can be done using 3 extension types:

1. tg#[\s\d]+ for calls by username
2. \+[\d]+ for calls by phone number
3. [\d]+ for calls by telegram ID. Only known IDs allowed by telegram API.

All Telegram->SIP calls will be redirected to callback_uri SIP-URI that can be set in from settings.ini file.
Extra information about caller Telegram account will be added into X-TG-* SIP tags.

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