Cast is the protocol used into the conversation between the webcam and your IP Phone.
It uses TCP/4224 in both direction ( easy to implement if you are firewalling your networks).
Pay also attention that the communication is only between the IP Phone and the webcam . CUCM is not involved at all in that “conversation” except for the TFTP config download.
In order to your DHCP to give the TFTP address to your phones , the common configuration is to use the option 150 which is the main and the more expanded concept used for providing your TFTP. It can provide an IP Address as well an array of IP Address.
This is also the code which you are using under IOS configurations.
But in some old implementation , you can find also the option 66 to give the TFTP to the phones . Option 66 is different in the meaning that you must provide a server name so you need to have DNS enabled . Also you can only pass one parameter!!!
So don’t be too disturbed if you see this option 🙂
Real-Time Monitoring Tool (RTMT) runs as a client-side application and uses HTTPS with TCP to monitor device status,system performance,device discovery and CTI Applications in the cluster
For call processing under the CUCM , you can find 2 types of traces :
- System Diagnostic Interface (SDI) : SDI informations are traces from services and logs from run-time event.
- System Diagnostic Layer (SDL) : SDL informations are traces from services as CUCM , CTI Manager and it stores logs state transitions between the node.
Most of the time , SDI traces will be the traces where you can find all stimuli and all interesting call processing traces regarding your phones. With a little knowledge ,it is not very difficult to read these traces
SDL traces are the transition states between the nodes and they are used more by Cisco TAC
Just a little reminder to say that the logical decision to route a call is based on the following order:
Route Pattern => Route List => Route Groups => Gateway .
But take also in mind that the configuration order is the reverse path.
As reminder , don’t forget that in pattern expression , * and # are valid expressions.
So in fact you have 0,1,2,3,4,5,6,7,8,9,*,#