Dear 3cx.com,
in my country it was very popular that public institutions had to buy PBXes by Siemens Enterprise which is now called Unify years ago. We are one of them with nearly 3000 phones of Openstage SIP (20/40/60/80) phones.
Our software release of the Siemens Enterprise "Openscape Voice" is version 4. It consists of 2 cluster members running in an active / passive configuration.
Software support for that software release ended years ago. Also the fax server is outdated. No unifed communication, only CTI is running.
I am here to ask whether 3cx has ever evaluated Openstage SIP phones to make it work with 3cx PBX?
According to Unify phase out date for Openstage SIP is 2022-06-30. End of development support is 2020-06-30.
We talked with Unify about an upgrade and they recommend their successor phones. And they even gave us a quote for their whole Unified software solution. Of course for our whole 3000 phones plus licenses plus servers plus support contract the the price they want is ridicoulos high. 3cx PBXes looks like a bargain. The only reason we haven't started evaluating 3cx is missing support for Openstage SIP devices, i.e. including support for CTI.
Openstage phone support uaCSTA,i.e.
https://wiki.unify.com/wiki/File:White_Paper_uaCSTA_for_OpenStage_SIP.pdf#file
Hint: 3cx really could earn money with supporting Openstage devices (if those phones work with their given firmware and API support. In my country we are talking about xxxxxx Openstage phones in government environments which need a new PBX within the next 1-3 years.
Of course those phones are not what you think of when you talk about opensource phones. Of course people have to change phones once. But if you can start with 3000 old phones and replace those ones step by step with a new one... This is a key argument, not only for us.
Back to "open"source. Openstage phones have kind of Asterisk support:
https://wiki.unify.com/wiki/SIP_Devices_and_Asterisk
"Common telephony features are supported out of the box, such as
call transfer,
call forwarding,
consultation,
voicemail, and many more. To add more functionality in order to build a feature-rich communication system, two additional interfaces can be used by developers:
- The OpenStage_WPI (WorkPoint Interface) provides an open, XML-based provisioning interface to support mass deployment and to enable automated updates and configuration"
https://wiki.unify.com/images/c/c7/OpenStage_Provisioning_Interface_Developer's_Guide.pdf
https://wiki.unify.com/images/9/96/White_Paper_uaCSTA_for_OpenStage_SIP.pdf
Perhaps you can think about kind of support those phones as much you can.