Mobile & Remote Access (MRA)

Cisco Unified Communications Mobile and Remote Access (MRA) is part of the Cisco Collaboration Edge Architecture. It allows endpoints such as Cisco Jabber to have their registration, call control, provisioning, messaging and presence services provided by Cisco Unified Communications Manager (Unified CM) when the endpoint is outside the enterprise network. The Expressway provides secure firewall…

Expressway Zone

When a call reaches Expressway, Expressway classifies it based on source and destination address and port.Based on classification, the call is sent to a specific «zone».Except for the Local Zone , the other zones connect to remote systems as in the case of a SIP Trunk on CUCM Different policies can be applied per zone,…

Components of Expressway Media Traversal

Proxy Default component used for media traversal Back-to-back user agent(B2BUA) B2BUA is an application invoked by the Proxy that fully terminates a call leg and establishes a new call leg. The call legs are then bridged together and count as different calls. Component used when media encryption policy other than “auto” is applied.B2BUA are of…

Business-to-Business using Expressway

Whats a Business to Business call ? When user place a call outbound from the enterprise to an external video service/customer or receive a call from external video service/customer over the internet its a business-to -business call. How can we make it working? Using Expressway servers we can make this working. Expressway C and E…

Using ACME on Expressway-E

The below is from Cisco Expressway configuration guide. I will be testing this on my lab and will share the screenshots. From X12.5 the Cisco Expressway Series supports the ACME protocol (Automated Certificate Management Environment) which enables automatic certificate signing and deployment to the Cisco Expressway-E from a certificate authority such as Let’s Encrypt. The…