Intermittent call failure can happen when some of the Media Brokers configured ports are blocked by the firewall

There is no specific documentation for reversing the roles of Client and agent in expert assist. The advanced SDK is documented at https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/remote_expert_mobile/remote_expert_...

The advanced SDK is documented at https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/remote_expert_mobile/remote_expert_mobile_1161/program/guide/Cisco_Remote_Expert_Mobile_11_6_1_10000_7_Advanced_Developers_Guide.pdf...