1, can't join the club. It is preliminarily judged that the old platform and the new terminal can't join the club due to algorithm compatibility problems, so they can join the club directly after reducing the DH algorithm version.

Step: Log in to the terminal Web and select System Configuration-Conference Parameters-change DH algorithm to DH 1536 and below.

2. For Bar300 series, you also need to log in to the terminal Web and select System Configuration->; Security, change digest authentication mode and TLS encryption mode to compatible mode.

Root sound

The encryption algorithm protocol of SMC 1.0 platform is quite different from the current terminal, which leads to the failure of negotiation between the platform and the terminal.

Suggestions and summary

When pulling a new terminal from the old platform, it is necessary to change some encryption algorithm modes of the new terminal to compatible modes and change the algorithm of the terminal to a lower version to adapt to the old platform.