Unfortunately, the Xtralis VESDA VHX-0210 has been officially discontinued without any replacement due to Modem Capabilities being obsolete. There is no replacement from any other manufacturer.You CAN utilize the VHX-200 that has NO Modem Capability, but that would require you to connect your devices directly to your computer source if that is even possible, depending on your situation.We apologize that there is no other solution! We’ve reached out to Xtralis regarding this on many occasions.