Victure pc530

I have a victor pc530 camera and it’s working fine when I talk through it (perfect) but only have interference on my phone and can’t hear anyone talking back how can I rectify this please

Hi, welcome to the forum!

Does the camera work fine when using it directly, so without HA in between?
Maybe it’s not a bad idea to change the topic title to something more revealing, that might get you more help.