Hi Steve and all; I attempted adding a new node (2424) onto my existing system where I have 2182 and 2248 running. 2182 is a real node using a usbfob; 2248 is my chan_dstar node. I followed the instructions in the ACID admin guide when adding the new node - modified the 4 files as instructed (rpt.conf, iax.conf, extensions.conf and usbradio.conf). That all went fine - got node 2424 setup and reporting to the stats page. I was able to use CLI and connect 2182 to 2424. I then noticed that there was no audio passing from 2182 over to 2424. I then tried issuing DTMF from 2182 and no go - CLI did not show my DTMF! Speaking with Jon (VA3RQ) who recently setup a 2 node system, we edited the rpt.conf and usbradio.conf files such that the 2 nodes specified Radio/usb0 and Radio/usb1 respectively. Similarly, we renamed and edited the usbradio_tune_usb.conf file to reference usb0, and also renamed the file name to usbradio_tune_usb0.conf and usbradio_tune_usb1.conf respectively. No luck - still no audio into the (original) fob. Unfortunately, I'm unable to test audio into the new fob since the mods are not complete! Since I had saved all of the original files, I rolled back to the original 4 files (single node, 2182) and unfortunately, I have the same symptoms - no audio into the fob. In fact when I go into debug mode, I do not even see a carrier from the fob. Audio out of the fob works fine! Is it possible that I've messed up something else when trying to add the second node - i.e., something other than the 4 files mentioned that would have an impact on the fobs ability to sense any of the inputs? Deaf in Toronto.... Ramesh.