IP Services for 3750 E 48 ports, upgrade from IP Base 3750E-IPB-LIC-QTY IP Base for 3750 E (the default license) 3750E-IPSLCB-QTY IP Services for 3750 E 24 ports, upgrade from IP Base L-3750E-IPSLCB-QTY E-Delivery IP svcs for 3750E 24 ports, upgrade from IP base L-3750E48-IPSLCB-Q E-Delivery IP Svcs for 3750E 48 ports, upgrade from IP base C3K-PWR-750WAC= Catalyst 3750-E/3560-E/RPS 2300 750WAC power supply spare C3K-PWR-1150WAC= Catalyst 3750-E/3560-E/RPS 2300 1150WAC power supply spare PWR-RPS2300 Cisco Redundant Power System 2300 and Blower,No Power Supply ACC-RPS2300= Spare Accessory Kit for Cisco Redundant Power System 2300 BLNK-RPS2300 Bay Insert for Cisco Redundant Power System 2300 BLNK-RPS2300= Spare Bay Insert for Cisco Redundant Power System 2300 CAB-RPS2300 RPS 2300 Cable for Devices other than E-Series Switches CAB-RPS2300= Spare RPS2300 Cable for Devices other than E-Series Switches CAB-RPS2300-E RPS Cable for Cat 3K-E, 2960 PoE Switches and ISR G2 Routers CAB-RPS2300-E= Spare RPS Cable for Cat 3K-E, 2960 PoE Switches and ISR G2 BLWR-RPS2300= Spare 45CFM Blower for Cisco Redundant Power System 2300 C3K-PWR-750WAC= Catalyst 3750-E/3560-E/RPS 2300 750WAC power supply spare C3K-PWR-1150WAC= Catalyst 3750-E/3560-E/RPS 2300 1150WAC power supply spare CVR-X2-SFP Cisco TwinGig Converter Module CVR-X2-SFP= Cisco TwinGig Converter Module