I have not touched on any on OBi110 except the few parameters to make it work with asterisk. My set up as follow:
PSTN in OBi110 --> Forward to SP2{1002} (1002 is an IVR extension in my asterisk) --> Key in to dial out or other service.
Dial out or other service work without any problem,. Echo test ok. But when dial out again via my 2b line, I can hear the other party voice but he or she can't hear mine.