3Com SuperStack II User Manual

Also see for SuperStack II: User guide Using User guide User guide Supplement sheet

Contents

3Com SuperStack II User Manual Manual pdf 13 page image

1 USING THE SUPERSTACK IIBRIDGE/ROUTER IN YOURNETWORKThis chapter provides an overview of the networking capability providedby the LAN, WAN, and serial ports on the SuperStack II NETBuilder SIbridge/router.Ethernet LAN Ports The SuperStack II NETBuilder SI bridge/router provides connection to twoEthernet LANs using either 10BASE-T or 100BASE-TX Ethernet. Boundaryrouter models have one port disabled. If you upgrade to full routersoftware, the second port will be functional.Leaf node Boundary Routing® is not available on the model 5xxbridge/routers.WAN Port The WAN port can be an ISDN S/T (model 43x and 53x — no integratedNT1), ISDN U (model 44x and 54x — integrated NT1), 56/64 Kbps CarrierService Unit/Data Service Unit (CSU/DSU) (model 45x and 55x), orT1/Fractional T1 CSU/DSU (model 46x and 56x) port, depending on theinterface module installed.For boundary routers, only one serial or WAN port can be active at a time.The remaining ports are used for back-up only.ISDN Port (Model 43x,53x, 44x and 54x)The ISDN port provides a basic rate interface (BRI). The BRI delivers twobearer (B) channels and one delta (D) channel. Each B channel cantransmit up to 64 kilobits per second (kbps); the D channel transmitsinformation about the call to computers at the switching system at a rateof 16 kbps. You can use both B channels together for a combined datarate of 128 kbps, or use each 64 kbps B channel separately.Some ISDN lines support up to 56 Kbps per B channel. For moreinformation, contact your ISDN service provider.HWBook Page 13 Friday, June 19, 1998 3:42 PM