Thanks for your tips,
I have set up my OBi110 to not answer the LINE port and connect the LINE port to the PHONE port of the same Obi and it works perfectly. It's a possible option when I move the other Obi to the other site.
The PBXes problem with SP1 was in fact "for security reasons ...", but I don't have tested yet the work around, because first I need to solve the problem of the drop call.
I tried to troubleshoot the other PBXes problem by calling into the AA from other than my mobile and calling out to the speed dial, but the result is the same as the callback. The call drop in the same second as the connection to the PBX is established.
OBi110 Call History :
Call 1 01/08/2012 22:33:30
Terminal ID AA1 SP1
Peer Name
Peer Number SP1(MyAcount@pbxes.org)
MyAccount@pbxes.org Direction Outbound Outbound
22:33:30 New Call
22:33:31 New Peer: SP1(+351918888888) Transfer Target, Continue At Ref:23678
22:33:38 Call Connected
22:33:38 End Call
Call 2 01/08/2012 22:32:34
Terminal ID SP1 AA1
Peer Name
Peer Number +351918888888
Direction Inbound Inbound
22:32:34 Ringing
22:33:04 Call Connected
22:33:31 Call Transferred Transfer to SP1(MyAccount@pbxes.org)
PBXES Call Monitor :
Date Time Caller ID Number Destination IP Trunk Context App Duration
2012-01-08 22:33:39 MySP2 00351211234567p0911234567# /77.72.169.129 12Voip from-internal-cont Dial 00:00:19
2012-01-08 22:33:38 "Anonymous" <+351309999999> 100 pbxes.org ext-local Dial (00:00:19)
2012-01-08 22:33:30 MySP2 00351211234567p0911234567# /77.72.169.129 12Voip from-internal-cont Dial 00:00:00
2012-01-08 22:33:30 "Anonymous" <+351309999999> 100 pbxes.org ext-local Dial 00:00:00
What is strange is that, in the PBXES the connections are duplicated in this case and, in the case that I start a call directly from the Phone connected to the Obi110 and it works, I do not have duplicated call in the PBX side.
I have add the extra "#" in the number, as suggested, and it seems to be a little faster.