I have 3 PBX’s connected via IAX(trough VPN).
Site-1 extensions 11xx. site-2 extensions 12xx. site-3 extensions 13xx
extension-to-extension dialing between the 3 pbx’s works fine.
All have separate incoming PSTN lines and have IVR on these incoming lines.
IVR setup has “enable direct dial” ENABLED.
External callers can dial anyone’s entension in the PBX they called into. But they cannot dial an extension on another PBX.(the IVR responds: We have not received a valid response)
How do I get this to work?