Help to identify the pins and LCD protocol of a Gigaset A400 phone

Hello, I'm new to the forum and today I'm writing to ask for help. It turns out that I have a Gigaset model A400 wireless phone which stopped working the base, but the screen still works.

I would like to know if anyone has already reused this lcd.

I for the time being the only thing I could measure with the mutimetro is the following:

C39363-A510-B75 OPTO0739GF
110401.W07222.CAS V3.1

[b]PIN              V[/b]
1               2.33v
2               -5.4v
3               2.33v
4                0v  
5               2.63v
6               1.79v
7               1.79v
8                0v  
9               1.79v
10              1.79v
11              1.79v

SPI or I²C? If anyone can give me a hand I would appreciate it.

Thank you