The Cisco 8-Port T1/E1 Multiprotocol Service Module (MPSM) is an 8-port T1 or E1, single-height service module for use in the Cisco MGX 8800 Series switches and the Cisco MGX 8200 Series edge concentrators. The MPSM delivers connectivity from DS-0 to T1/E1 speeds. It supports the same functions as the 8-port Frame Relay service modules (FRSMs), ATM user service modules (AUSMs), and Circuit Emulation service modules (CESMs) currently deployed and is meant to be a replacement for these cards.