... board for AR2240, SRU40 and SRU80 (Service and Router Unit). SRU40 can provide 2Mpps packet forwarding performance ... various interface cards, including Ethernet interface cards, E1/T1/PRI/VE1 interface cards, synchronous/asynchronous interface cards, ... cardsCopper cableSupport for various interfaces, including xDSL interfaces, E1/T1 interfaces, serial ports, and ISDN interfaces, protecting customers ...