The recvonly status is for that particular connection. This is usually not an issue with the DSP hardware. So, resetting will most likely not help.
couple of things to check are:
1. Ip connectivity for the xcode devices. (use the fast ethernet interface, not the gigE). Can you ping the phones or GW, as the case may be?
2. are dsp packets going up in both directions.. tx and rx? If they are not going up in a particular direction, then try to do a "debug mediacard all" to see if there are any problems. A "debug ip rtp pack" might also help - caution, very verbose.
3. Make sure you have the latest version of CMM software. There have been some major fixes in the latest version.
Thanks!