According to this document:
"Incoming calls received via XOT connections that match a routing entry specifying an XOT destination are cleared. This restriction prevents Cisco routers from establishing an XOT connection to another router that would establish yet another XOT connection."
Does anyone know the reason for such a limitation? Is there any way to overcome this? If I have 2 serial ports in the router connected with a null modem cable, can I then route incoming X25 calls from XOT out on serial0, and when it gets back on serial1, the call would suddenly be fit for XOT destinations again?