We have a call manager and about 270 users running for about 1 month now, however we have a problem with dialing certain numbers. All routes are in place on the call manager and the gateway is configured correctly. We can dial 1026 (South African time enquiry), however when dialling 1023 / 1024 the call just rings until it times out. Because the 1026 is working, I know my routing and gateway config is correct, but cannot figure out why or where these 1023 / 1024 numbers are going as when calling them, an IVR should answer the call on the other side. So either the call is getting to where it is meant to be going, or somehow it is sending a "false" ringing indicator to the phone I am calling from.
Has anyone heard or experienced this problem or have any ideas? The call manager is sending the cisco gateway the right digits and according to debugs the call should be going where it is meant to.