The call data and hardware cache for a dial-up access concentrators caches the hardware device setup and the communication connection data created for a call connection for use in the next successively received incoming call. The call data and hardware cache for dial-up access concentrators enables the existing physical hardware connection that comprises the call connection in the dial-up access concentrator, the call processing and call connection resources to remain available for use in the next successively received incoming call. This step also retains the communication connection data comprising the call setup and call management data in the shelf controller and the call processing data in the call signal processor card for possible reuse. If the next received incoming call is substantially similar in characteristics to the last terminated call, then the existing "on-hold" signal processing card and shelf controller data as well as the TDM connections therebetween can be reused with minor modifications to serve the incoming call. This reduces the time required to setup a communication connection for the received call and reduces the need for CPU resources.