Graphic of active calls

Hello,

Looking at Observium resources I could identify that CISCO-VOICE-DIAL-CONTROL-MIB isn't implemented. I have in my device plant a Cisco 2801 Router that I'm using for the voice part and I have identified that through OID 1.3.6.1.4.1.9.9.63.1.3.8 I can pull the information regarding the show call active voice command. And through the more specific OID 1.3.6.1.4.1.9.9.63.1.3.8.2 the amount of calls (https://community.cisco.com/t5/ip-telephony-and-phones/snmp-oid-for -monitoring-number-of-sip-calls-on-cube/ td-p/1596401).
By means of the attachments it is possible to implement a graph that shows the amount of connections for the routers that have that active part?

Thank you