How to join this list?

First you should read the following document: Towards interchangeable Radio Units.

In order to start integration, we will require:

1. root access to the RU
2. commitment to provide access to RU's m-plane source code (we do not require open source)
3. if possible, no dependency on any proprietary code running on BBU/DU/CU except Amarisoft OR access to the source code of any dependency running on the BBU/DU/CU 

We enforce those requirements for two reasons: (1) cyber security (2) quality assurance of m-plane integration.

if you agree with this, then the next step will be to test your RU. We will come on site with our CPRI (Split 8) BBU/DU/CU for a test session. We also support eCPRI (Split 8). We will the ensure that s-plane and u-plane can be configured. It should usually take between 15 minutes and 4 hours. About 66% RU vendors fail this test due to inability to adapt IQ mapping or other reason. Please read the following document for the test procedure: 

RU Integration Test Procedure: 

• Requirements
• Preparation
• Procedure (sync plane and user plane)
• Procedure
• Verified supported CPRI Specs

Then we will send a questionnaire: 

If RU supports Netconf as M plane:

• Netconf/ORAN Yang model (CPRI) requirements
• DHCPv6 dnsmasq configuration verification (private link)
• Netconf verification (private link): connection, config sending, notification subscription

Else, we need to analyse the the M plane document

Then we will integrate your RU completely.

The complete process takes between 3 months and 12 months. It will require effort on both sides, mainly on Rapid.Space side actually.