Product UPC: 032664730924 Cisco offers a 56 64 KBPS CSU DSU WAN Interface Card. The 4 wire 56k CSU DSU implements switched 56k and DDS leased line operation. The hardware feature set is identical to the 4 wire 56 64k CSU DSU for the Cisco 2524 and Cisco 2525 the Cisco IOS configuration is also the same. It supports DDS leased line operation AT T Pub. 62310 , supports DDS loop rates 2.4, 4.8, 9.6, 19.2, 38.4, 56, and 64 kbps, supports switched 56 operation at 56 kbps AT T Pub. 41458, Sprint TS 0046 . Receiver sensitivity is 4...