Two way audio not working

Hi all,

I recently had the following set up installed:

• Acusense DS-2CD2386G2-ISU/SL(2.8mm) x2
• Colorvu DS-2CD2347G1-LU(2.8mm) x2
• Hikvision NVR DS-7608NI-K2/8P

I have updated the firmware for the NVR and cameras to the latest available versions. I have configured the cameras to play and save audio from all four cameras, this is working as expected.

However, I can't seem to get the two-way audio working. I am using the Hik Connect app (version 4.7.1.0818). When I...

Two way audio not working