E model, if the same customer has the uCPE deployed with just a vRouter enabled, and if there is an urgent need for a firewall, it can be ordered via the portal, and within minutes that firewall can be up and running. Another use-case, with WANx, has the customer with a point-of-sale application that is getting very slow response time. The WANx VNF can be deployed in a matter of minutes and configured to optimize the point of sale flow. This model also allows for new service and business models. An example is a try-and-buy model where the service provider can offer the customer the ability to try a new VF or a new ven- dor within a functional category. Today, if a service provider wanted a customer to trial a WANx physical appliance at a branch site, there is a lot of work involved for this to occur. The device has to be shipped to the site, the customer has to physically install it, which will likely cause the site connectivity to be lost during the install. In the event there is an issue with the WANx hard- ware during the trial and it has to be removed, someone has to be physically there to deinstall the hardware. This is not an attractive model to introduce new functions for both the customer and the service provider. The uCPE can greatly improve this. If the uCPE is installed at the customer site and the cus- tomer would like to try the new WANx, all they have to do is order it from the portal, download the software image on to the uCPE, boot it up, and dynamically service chain on the uCPE. No physi- cal changes are needed, nobody has to be at the site, and the site does not incur any down time. If there is a problem with the WANx trial, or if the customer does not see the value in it, it is a simple software change in the portal to remove it from the service chain and revert the site to what it was before. This can allow customers to almost "play" with VFs at their sites, till they get the combina- tion of functions and the set of vendors that works best for them. Enterprise Networks Finally, the open soft