Turing off encryption would avoid this but I'm wanting to make sure security / privacy of calls isnt compromised.
It all depends on your company's requirements. If you have people taking credit card payments over the phone or some other sensitive information I would say to leave on encryption and use an SRC. If not you should be fine disabling the encryption.
My recommendation is to use an SRC, but not everyone has the money for the extra costs.
jrg0852, just a note, I have a redbox voice recorder going through a SRV, so you can do it.