Ericsson R290 Satelite telephone backside connectors!

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Posted by lts
Hello!

I've just bought a used Ericsson R290 Satelite phone to use in a remote area, this phone has 3 connectors on the back, which i would guess could be used to connect an external antenna. BUT, i cannot find ANY documentation or people who can answer me how these connectors are used. Can anyone here help me? Does anyone know where i can find a service manual for this phone?

Thanks in advance,
LT