slight issue with two (or more) UC500s connected via VPN - All internal calls work fine between systems, as do external from each to local PSTN.
The problem I am finding is when an ephone-dn is forwarded to a mobile(cell) phone for example Internal number 3401 call-forward all 907555XXXXXX ( 9 is used to diect via ISDN in the UK) if the call originates from another UC500, then the call is made from "source" UC500 when I actually want the call made from the "destination" UC500.
This is not an issue with two systems in the same country, since they will generally have a route out in the same manner, but when an International UC500 (for example Singapore) tries to call internal 3401, the source UC500 in SIngapore attempts to dial the exact number "807555xxxxxx" instead of letting the destination UC500 route the call.
Calls inbound via ISDN or Private VPN SIP from say a Mitel PBX work correctly, only Cisco to Cisco where we have the problem.
Can someone suggest a way of doing this? Note I do not want to translate calls from singapore to International nummber eg "+447555xxxxx" I want the destination PBX to route the call and have toll charges.