The Cisco 7500 series MIX-enabled chassis is identical to the current Cisco 7500 series classic chassis plus the addition of a new multiservice capability: the Multiservice Interchange (MIX) backplane. Future voice applications will provide seamless, end-to-end call management in both the packet and digital voice domains. A Cisco 7500 series router with the MIX-enabled chassis and the DSP-farm capabilities of the digital voice port adapters provides a high-density voice and fax gateway solution to connect private branch exchanges (PBX), the public switched telephone network (PSTN) and the WAN to create a multiservice network. In addition, MIX-enabled multichannel port adapters will combine digital voice channels with packet channels on a channelized access link to achieve access cost savings, without requiring a separate time-division multiplexing (TDM) multiplexer. This will allow DS0 channels to be switched from a channelized WAN link to interfaces connecting to PBX, video CODEC, or other TDM-oriented devices. These multiservice capabilities give customers a manageable migration path to robust, cost-effective, multiservice networks.The Route Switch Processor 16 (RSP16) is the newest and highest-performance main system processor for the Cisco 7500 Series Router. The RSP16 supports up to 1 GB of program memory, allowing customers to significantly increase their route tables. The RSP16 provides significant performance enhancements, increasing switching performance by 20 percent and 55 percent compared the RSP8 and RSP4+, respectively.