The MIX-enabled T1/E1 port adapter enhances the multi-service solutions enabled by the enhanced digital voice adapters available on the Cisco 7200 VXR Series of routers. By using the TDM capabilities of the Cisco 7200 VXR, the MIX-enabled T1/E1 port adapter can maximize the use of digital signal processor (DSP) resources on the enhanced digital voice adapters. The MIX-enabled T1/E1 port adapter enables the use of the DSP resource pool on the enhanced digital voice adapters. This concept of sharing the DSP resources across the TDM bus on the Cisco 7200 VXR platform is called DSP farming.The MIX-enabled T1/E1 port adapter provides an ideal migration path to multi-service networking. Customers who need to keep existing circuit-switched network interfaces while they migrate to packet-based multi-service solutions can do so in a seamless and structured manner. There is no need go through complete replacement of older, legacy PBX or key communication system equipment when migrating. The MIX-enabled T1/E1 port adapter seamlessly interoperates with other multi-service platforms available from Cisco, allowing the easy creation of a complete end-to-end packet voice solution.