Model No. Port Density Connectivity Power Supply Form Factor Internal Modem Cellular Region 40 Port Model No. DSM-40DCNM-E Port Density 40 RJ45 Connectivity Dual Ethernet Power Supply 48V DC Form Factor 19” 1U Internal Modem Cellular Option Cellular Region   Model No. DSM-40DCNM Port Density 40 RJ45 Connectivity Single Ethernet Power Supply 48V DC Form Factor 19” 1U Internal Modem Cellular Option Cellular Region   Model No. DSM-40DC-E Port Density 40 RJ45 Connectivity Dual Ethernet Power Supply 48V DC Form Factor 19” 1U Internal Modem Dial-Up Cellular Region   Model No. DSM-40DC Port Density 40 RJ45 Connectivity Single Ethernet Power Supply 48V DC Form Factor 19” 1U Internal Modem Dial-Up Cellular Region  

"Best part is it just works out of the box. The serial ports work great with the Cisco gear with no config changes from the factory default."

Jack Kinney — Lincare Network Operations