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C613-03087-00 Rev E Hardware Reference Contents Introduction ...................................................................................................... 4 Models Covered By This Reference .................................................................... 4 Where To Find More Information ...................................................................... 4 AR700 Series Routers ........................................................................................ 5 AR725 Router ................................................................................................... 6 Hardware Features ..................................................................................... 6 Power Supply ............................................................................................. 7 AR725 LEDs and what they mean ............................................................. 10 AR745 Router ................................................................................................. 11 Hardware Features ................................................................................... 11 Power Supply ........................................................................................... 13 AR745 LEDs and what they mean ............................................................. 15 AR750S Router ............................................................................................... 17 Hardware Features ................................................................................... 17 Power Supply ........................................................................................... 18 AR750S LEDs and what they mean ........................................................... 19 AR750S-DP Router .......................................................................................... 20 Hardware Features ................................................................................... 20 AT-PWR03 Power Supplies ........................................................................ 21 AR750S-DP LEDs and what they mean ..................................................... 23 AR770S Router ............................................................................................... 24 Hardware Features ................................................................................... 24 Power Supply ........................................................................................... 26 AR770S LEDs and what they mean ........................................................... 27 Online Documentation .................................................................................... 28 To Access Documentation ......................................................................... 28 AT-TFTP Server ................................................................................................. 29 Using Windows Terminal and Hyperterminal ................................................... 30 Router Start-up ............................................................................................... 33 Memory .......................................................................................................... 37 Random Access Memory (RAM) ................................................................ 37 Battery-Backed RAM (AR725, AR745, AR770S only) ................................. 39 Onboard Flash Memory ............................................................................ 39 CompactFlash (AR725, AR745 only) ......................................................... 41 Expansion Options .......................................................................................... 43 AR740 RPS Redundant Power Supply (AT-AR725, AT-AR745 only) ............. 43 SFP Ports (AR770S only) ............................................................................ 46 PICs and NSMs ......................................................................................... 46 PCI Accelerator Cards (PACs) .................................................................... 47 Asynchronous Interfaces ....................................................