Iam a newbie to the expressways.
recently while reading through about Expressway setups.
I saw a picture which had
Expressway- C (In the inside of the Firewall)
Expressway- E (In the DMZ)
The expressway C then runs a SIP trunk to the CUCM.
As I understand Few years back in deployments . I see that there was only a
VCS- Control
VCS- Expressway
After cisco acquiring tandberg, Later CUCM versions could register all tandberg endpoints eliminating VCS-Control
What are the function & capabilies of Expressway C & Expressway E?
Does both need to be involved in a typical set up for firewall traversal?
I also read that Expressway C is the traversal Client & E is the traversal server. what does this mean ?
Does expressway C deal with call routing and registeration of endpointss aswell ?
Looking to understand.
