Something

[general]
context=default
bindport=5060                   
bindaddr=0.0.0.0                
srvlookup=yes 


[grandstream]
username=grandstream
secret=hello
type=friend                    
context=ata               
host=dynamic             
canreinvite=yes             
allow=ulaw                     
allow=alaw

[linksysata]
username=linksysata
context=ata
canreinvite=yes
type=friend
host=dynamic
allow=ulaw
allow=alaw

[username]
username=username
canreinvite=yes
type=friend
host=dynamic
context=ata
allow=ulaw
allow=alaw

[linksys]
username=linksys
canreinvite=yes
secret=wifi
context=ata
type=friend
host=dynamic
allow=alaw
allow=ulaw

[linksys2]
username=linksys2
canreinvite=yes
secret=wifi2
context=ata
type=friend
host=dynamic
allow=alaw
allow=ulaw