Circuit for the Phone

[asimzaeem]

Can anyone guide me where can I find the circuit of this phone?
I have this phone in my store room and it came from UK many years ago
Unlike normal phone this phone has a plug that goes into wall socket and it takes current from there, I don’t have that circuit that this phone uses. From where can I find the circuit so that I can utilise this phone in Pakistani settings?
I am living in Islamabad, any place in Islamabad or Rawalpindi from where I can find it?

Pictures attached

[TypeA]

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[asimzaeem]

I have reposted pictures

[TypeA]

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[asimzaeem]

That sound very techie stuff, where can I find that rj11 cable with box? Any idea?

[nfssaad]

literally every shop that sells electrical parts bobs and ends..

tell them you want a telephone wali dibbi, and telephone ki tar

[margallar]

if it had an adapter for wall socket, just find out if it was ac/dc and what voltage and get a matching adapter from college road pindi