You have no COS signal from the receiver. You will have to use VOX. Sent via smoke signal (AT&T) On Feb 8, 2017 11:23 AM, kb1mcu@gmail.com wrote: Hi Everyone, I could really use some help here. I don’t know if this is a wiring issue or a configuration issue. It’s probably a configuration issue. I’m trying to build a Simplex Node using an HT. I purchased a URI and made a cable going from the URI to the TRRS Jack on my Vertex VX-150 HT. It will only transmit or receive. And this is dependent on whether the “carrierfrom=” setting is set to “usb” or “usbinvert” When the simpleusb.conf is setup with “carrierfrom=usbinvert”, my HT will transmit call sign and time and stuff like that but it does not recognize any DTMF Commands I send using a different radio on the same frequency. If it is set to “carrierfrom=usb” my Pi2 will receive DTMF commands but the HT will not transmit anything. Thanks In Advance, -Jamie / KB1MCU ------------------------------ [image: Avast logo] <https://www.avast.com/antivirus> This email has been checked for viruses by Avast antivirus software. www.avast.com <https://www.avast.com/antivirus>