CISCO SYSTEMS PVDM4-128= CISCO PVDM4-128 - PLUG-IN MODULE - ON-BOARD MOTHERBOARD OR T1/E1 MODULE SLOT - 1

CISCO SYSTEMS PVDM4-128++= CISCO PVDM4-128 - PLUG-IN MODULE - ON-BOARD MOTHERBOARD OR T1/E1 MODULE SLOT - 1

CISCO SYSTEMS PVDM4-256= CISCO PVDM4-256 - PLUG-IN MODULE - ON-BOARD MOTHERBOARD OR T1/E1 MODULE SLOT - 2

CISCO SYSTEMS PVDM4-256++= CISCO PVDM4-256 - PLUG-IN MODULE - ON-BOARD MOTHERBOARD OR T1/E1 MODULE SLOT - 2

CISCO SYSTEMS PVDM4-128 128-CHANNEL DSP MODULE

Energy-saving feature. The PVDM4 DSPs offer multiple power-saving modes, including a power-saver mode when the module is not in use. In power-saver mode each PVDM4 can save up to 5 watts of power. ...