Intercom handset replacement

Frances requested 3 quotes from Security Alarm Installers in Bronte

we live in an apartment building, and would like just the handset of our intercom replaced. it is audio only, with a button to unlock the front door.

Doorbell repair
Panacom doorbell not working. I think the front unit may be water damaged

Terraneo intercom not working, poss water prob, ext intercom fallen off wal
there could be water damage in the external parts? intercoms also not working...

Replace panels and handsets for audio intercom
Replace 5 entry panels, 5 transformers and replace 25 handsets for unit block...