Control access to essential coherent line card interface capability with Cisco ESS-TXP-RTU. Built for service-provider optical transport environments, this RTU supports a disciplined procurement model where capability is matched to deployment need, not padded for unused headroom. For infrastructure teams managing dense transport networks, that matters. It helps standardize how coherent line card functionality is provisioned across sites, simplifies commercial planning, and keeps expansion aligned with actual service demand. Instead of paying for broader platform capability than the rollout requires, teams can activate the specific entitlement tied to the line card interface. Cisco’s optical portfolio is often selected where uptime, planning accuracy, and lifecycle control matter more than headline specs. This RTU fits that model. It is suited to organizations that want predictable service activation, cleaner asset management, and a procurement path that supports phased network growth. Use it when you need to formalize entitlement for coherent line card interface deployment in a Cisco optical transport environment and maintain tight control over what is enabled, where, and when.