The multichannel DS1/PRI port adapter (PA-MC-2T1, PA-MC-4T1, and PA-MC-8T1 versions) is now supported on the Cisco 7100 series routers. The PA-MC-2T1, PA-MC-4T1, and PA-MC-8T1 provide a single-wide module that integrates channel service unit (CSU) functionality, data service unit (DSU) functionality, and DS0 channel support into the Cisco router. The PA-8DSX-1 version integrates DS1 data service unit (DSU) functionality and DS0 channel support into the Cisco router.