Cisco's Integrated Services Router 4451, branded as ISR4451-X, has two enhanced service-module (SM-X) slots that will deliver up to 2 Gbps of aggregate throughput. Also, this router supports two DDRM types: data plane and control/service plane, making management easy. This model belongs to the Cisco 4451-X integrated services router series. This model has passed through several safety and EMC certifications and standards.