Just copy telephony.py and resources folder to your project and you can use it.
- A2Billing
- MagnusBilling
- cgrates
- ASTPP
- PyFreeBilling
- FSbilling
- ngbilling
- abills
- Ubilling
- BGBilling
- HyperBilling
- OV500 Open Source Billing
- The list of billing software for FreeSWITCH
- MiRTA PBX
- Thirdlane PBX
- 3CX
- CustomPBX
- PortSIP PBX
- MERA VoIP Transit Softswitch (MVTS) by MERA Systems
- Avaya
- RTU - Retail and Transit Unit
- HIVE
- ZeonPBX
- miniSIPServer
- VodiaPBX
- CommuniGate
- Oracle Communications Converged Application Server
- HERO Hosted PBX
- Ozeki
- Repro
- Cirpack
- Routr
- Flexisip
- NkSIP
- drachtio-server
- Ostel
- XiVO
- CSRP - Canonical SIP Routing Platform
- Bluebox (switch agnostic UI by 2600Hz, no updates)
Other VoIP-related projects can be found here: https://github.com/rtckit/awesome-rtc