[Freeswitch-users] Understanding a dial string returned by group_call

When I execute a group_call command I get responses like this [^^:sip_invite_domain=example.com:presence_id=1010@example.com ]sofia/external/sip:1010@192.168.56.1:59527 ;ob;fs_nat=yes;fs_path=sip%3A1010%40192.168.56.1%3A59527%3Bob Are there any decent resources that would help me understand this better? As I understand it the [...] at the beginning means, apply variables to the channel, but what does the ^^ mean? And what does the bit after the address do/mean? i.e. in this specific case the bit ;ob;fs_nat=yes;fs_path=sip%3A1010%40192.168.56.1%3A59527%3Bob Thanks Mark