MTLS using built in device cetificate

[tonipamies]

Hi,

I'm trying to set my web server and phones to do mutual certificates exchange on HTTPS provisioning.
I'm using Centos 8.2, apache, mod_ssl and openssl
It works fine for Yealink T23G, T27G but it does'nt work with Yealink W60B and T46G
I'm using the Yealink certificates provided by my reseller (I have attached them)
I trying to configure openssl with:

1. Systems defaults: SECLEVEL=2, the error is: Error (66): EE certificate key too weak
2. SECLEVEL=1, the error is: Error (68): CA signature digest algorithm too weak
3. SECLEVEL=0, the error is: Error (7): certificate signature failure
   

can anybody to help me?