Router with VSEC/K9 vs no security

[news2010a]

Hello, imagine I am selecting a router, let's say to be used as a VoIP Gateway (C3945 + PRI ports).

If I order the "Security license" included (bundle C3945-VSEC/K9), what is the benefit of getting the security license for a gateway router?
Today in the organization we don't see an immediate application for the security license, but I would like some feedback on ways that it could benefit the organization if future security policies are implemented in the future.

[Roman Rodichev]

security image will give you:

• firewall feature set if this device is your main internet gateway
• VPN tunnels to other sites