I need to clarify the difference between the 3925-Vsec/K9 bundle and the 3925-Sec/k9 bundle.  A vendor is telling me that a 3925-Sec/k9 router will not allow an IP phone connected thru an etherswitch mod to work off that router and I must order a VSEC bundled unit.  The router doesn't need to act as a gateway, only needs to have an IP phone endpoint on it.  This doesn't sound right to me so I want to validate this due to the price difference.  Thanks!