Hi Fahim,
Yes, it is possible to configure notifications and to get the topology view using PCA
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucme/bacd/configuration/guide/cme40tcl/40bacd.html
Accessing the Unified CM or VCS Cluster Topology
To access the Unified CM Topology View, choose . Click on a Unified CM cluster name, and then go to the Topology tab.
To access the VCS Topology View, choose . Click on a VCS cluster.
You can also view the Topology tab from Device 360 View of Unified CM or VCS. Click the Cluster ID value in the Device 360 View. This launches the Cluster View page for that cluster. Now click Topology to launch the Topology View.
http://www.cisco.com/c/en/us/td/docs/net_mgmt/prime/collaboration/10-6/assurance/advanced/guide/Cisco_Prime_Collaboration_Assurance_Guide_Advanced_10_6/Cisco_Prime_Collaboration_Assurance_Guide_Advanced_10_6_chapter_011011.html#concept_A0267CA66D5241619A1A2835C1CDC077
Manish