You found 216 products in Expansion Modules

StarTech.com (PCI2S1P) Expansion Module
PCI Interface, Cabling: Parallel, Serial
6 store offers from £20 - £27

Cisco WIC-1T (WIC1T) Expansion Module
WIC Interface, Cabling: Serial RS-232, Serial RS-449, Serial RS-530, V.35, X.21
6 store offers from £161 - £200

Hewlett Packard (J8434A) Expansion Module
Cabling: Fiber, Ethernet 10GBase-CX4
6 store offers from £739 - £940

Cisco - Voice interface card - plug-in module - Expansion Slot - E1 (VWIC-1MFT-E1=) Expansion Module
RJ-48 Interface, Cabling: Network
6 store offers from £438 - £599

Cisco Line Card (WS-X4548-GB-RJ45=) Expansion Module
1000 Mbps, Plug-In Module, Cabling: Ethernet 1000Base-T, Ethernet 100Base-TX, Ethernet 10Base-T
4 store offers from £1917 - £3854

APC SmartSlot Interface Expander AP9607 Expansion Module

5 store offers from £76 - £88

Cisco CP-7914= Expansion Module
Cabling: Phone
5 store offers from £159 - £191

Avocent Server interface module - Expansion module - serial (0636430017020) Expansion Module
RJ-45 Interface, Cabling: Serial
5 store offers from £54 - £65

Cisco (WIC-2T) Expansion Module
Serial WAN Interface, Cabling: Serial, V.35, X.21 DCE, X.21 DTE
5 store offers from £294 - £325

Cisco (WIC-2A/S=) Expansion Module
Serial WAN Interface, Cabling: Serial
5 store offers from £202 - £270