68 Chapter 4 Installing option cards and DIMMsNN46110-318 02.01Installing and replacing option cardsThe VPN Router 2750 has four slots for option cards (Figure 22 on page 66). Thissection provides instructions about adding new option cards to the gateway or, ifnecessary, replacing an existing card. Table 16 lists the option cards that you caninstall in the VPN Router 2750.Table 16 Supported option cards for the Nortel VPN Router 2750 2750Option cardMaximumnumber RestrictionsSSL VPN Module 10001 1 Install this card in slot 1 only.VPN Router 2750 Security Accelerator 2 110/100BASE-TX Ethernet interface 41000BASE-T (1000 GT) Ethernetinterface341000BASE-T (1000 MT) interface(copper) 4 2Install two 1000BASE-T (1000 MT) (1000 MT)cards, two 1000BASE-SX cards, or one card ofeach type. (But see Table 17 on page 69.)1000BASE-SX interface (fiber) 556/64K channel service unit/digitalservice unit (CSU/DSU) WAN interface 64Asymmetric digital subscriber line(ADSL) WAN interface 74Integrated Services Digital Network(ISDN) BRI S/T or U interface84T1 CSU/DSU WAN interface(full-height) 4 For E1 support, you must install the half-heightinterface card.T1/E1 CSU/DSU WAN interface(half-height)4Quad T1/E1 CSU/DSU WAN interface 9 3V.90 modem interface10 4 If an SSL VPN Module 1000 is in slot 1, do notinstall the V.90 modem interface card in slot 2.Single V.35/X.21 WAN interface(full-height)4Single V.35/X.21 WAN interface(half-height) 114HSSI WAN interface12 2 Do not install in slot 4; install in slot 3 or 1 ifpossible. If an SSL VPN Module 1000 is installed,you can install only one HSSI WAN interface card.
