The way that SipBroker works involves:
You dial: *9562 88800001#
It transforms it to:
88800001@sip.aba12.com
It Dials
If for some reason the server at sip.aba12.com is not accepting inbound SIP calls from third parties then this will not work...
One way to test is to call
88800001@sip.aba12.com without involving SipBroker ... what I usually do to test is go to GizmoCall.com, login, paste in
88800001@sip.aba12.com, and press call...
If it doesn't work there either chances are the trouble is at sip.aba12.com