voice service voip allow-connections h323 to h323 allow-connections h323 to sip allow-connections sip to h323 allow-connections sip to sip supplementary-service h450.12 no supplementary-service sip refer fax protocol cisco
When the issue happens if you do a "Show isdn Status" do you see the layer 2 in Multi Frame Established or its TEI_ASSIGNED. In case that its going into TIE Assign you can run a "Debug isdn q921" to see if its the Telco that for some reason change something in the connection.
I had seen this kind of issues in the pass, what I would like to recommend its to put the "debug isdn Q921" to run in the routers buffer and with we will have more the information.
These are the steps to enable the debugs to run at the routers buffer.
If you are able to make outbound calls at the time, then you can run a debug isdn q931 and see the outbound calls going through.
If you can make outbound, but when you make an inbound call you do not see an RX SETUP message then the problem is almost certainly SP related - the circuit is working one way, but the call just isn't hitting your router inbound.
If you do see an RX SETUP message, and then you see the call being rejected by the router, then the problem may be with your kit... post back the debugs when this happens.
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These are the paths to get to each CCX logs through CLI. They may be helpful if you are having issues accessing RTMT or downloading logs through it.
If you want to download them you have to prefix "file get " and you can add one of the options (re...