So let's talk a little bit more about Spark Hybrid scenarios. If you remember, Spark Hybrid has the Cisco Spark cloud, but it has West's cloud capabilities joined together in a hybrid scenario, along with whatever you have as a customer on your premises.
Now, the way this works is there's a key piece of technology that joins together the West cloud, the customer prem, and what's in the Spark cloud, and that's something called Expressway. So we have this technology here called Expressway, which really is from Cisco. It joins together basically the firewall traversal technology that's going to join together the West VoiceMaxx CE System and the Cisco Spark cloud. So Expressway is going to sit between these two, and it's also going to route things out to the customer premises. So it's going to basically be the way you talk to your exchange server, the way you talk to your active directory server, that sits on your prem.
What this enables is all the best of the Cisco Spark cloud services, basically messaging and meeting. But you can use West and VoiceMaxx CE for your calling, and then you can use your on-prem exchange and active directory services. So you can integrate in with messaging in your email system as well as your active directory, which has all the information about all your different employees and how you'd want to populate those into Spark rooms. So that's how the Spark Hybrid scenario comes together. The key technology that brings it all together is Cisco Expressway, and we host that as part of the West cloud.