Hi there
CUBE is convenientorg if you want to peer directly with another org. if dont have anything with DNS zones, looks up etc (like SIP URI dialing etc). Just a dial peer to the PSTN world. More deterministic call routing
Expressways more with traversal, different search rules easy to configure. flexible and allow room for expansion and more additional capabilities.
CUBE is simple in terms of cost reasons.
Advantages of Exp
As its primary features and benefits, Cisco Expressway:
- Offers proven and highly secure firewall-traversal technology to extend your organizational reach
- Deployment flexibility - deploy virtually or as an appliance
- Supports a wide range of Cisco IP phones, Cisco Collaboration Desk endpoints, and Jabber for smartphones, tablets, and desktops
- Complements bring-your-own-device (BYOD) strategies and policies for remote and mobile workers
- Is standards-based and highly secure
Hope this Helps
Cheers
Rath!
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