AW: fixes for mncc-harald branch

If anyone wants to look further into this, I'm happy to record some PCAP files with some example RTP/RTCP dumps. If you want, even combined with the TCP connection to the BSC, so you have a correct timeline and know what the BSC told the BTS when, and how the BTS reacted to that.

i would like to see some of this payload, but without any BSC traffic. when i see in the future, i see that a bts directly forwards rtp data to remote sip phone or media gateway or other bts. therefore it must be a standard. i think it is gsm audio coded.