[asterisk-ss7] Using dynamic DAHDI loop back with Libss7

[Mehdi Shirazi]

Hi
This is my system.conf :
dynamic=loc,1:0,31,0
bchan=1-15,17-31
dchan=16
echocanceller=mg2,1-15,17-31

dynamic=loc,1:1,31,0
bchan=32-46,48-62
dchan=47
echocanceller=mg2,32-46,48-62

and this is my chan_dahdi.conf:
[channels]
signalling = ss7
ss7type = itu       

group = 1
linkset = 1  
context = one
slc=0
pointcode = 1111   
adjpointcode = 2222    
defaultdpc = 2222   
cicbeginswith = 1 
channel=1-15        
sigchan = 16

group=2
linkset = 2
context = two
slc=0    ; same slc=0 because of loop back
pointcode = 2222
adjpointcode=1111
defaultdpc=1111
cicbeginswitch=1
channel=32-46
sigchan = 47

please tell me what is wrong in this configuration?

Regards