Question

An engineer reviews a Cisco UCM deployment and notices that several route patterns for international dialing (9.011!) were configured but left in the <None> partition. Gateway devices and some phones have a Calling Search Space that does not explicitly list any partitions. During a security audit, calls from these phones are successfully reaching international destinations even though the intended dial plan should restrict them. What is the root cause of this behavior?

Accepted Answer

Any device, regardless of its Calling Search Space, can reach patterns placed in the <None> partition, so the international route pattern is universally accessible

Answer

Devices with an empty Calling Search Space automatically inherit the Standard Common Device Configuration CSS, which includes all partitions

Answer

The <None> partition is evaluated last, so it only matches when no other partition contains a closer match, meaning these calls should have been blocked

Answer

Route patterns in the <None> partition require an explicit Route Class of 'International' to be reachable, which was applied by default