We currently have 2 G450's and a HP server providing service to about 200 customers. We are looking at buying a S8300 card for local survivability for the gateways. Am I going to need another set of licenses for the S8300? What am I going to need to look for in our current setup to enable SLS? We mostly use the system for Pots and Digital phone use. We have a Pri on V1 of gateway 1 and a SIP trunk on V1 on gateway 2. The SIP trunk isn't being used at this time.