Cabletron Systems W85 Manual Do Utilizador

 

The HSIM-W85 extends the functionality of certain Cabletron Systems 
platforms by providing an interface for Wide Area Network (WAN) DS1 
services. The HSIM-W85 is a High Speed Interface Module (HSIM) used 
to provide WAN services using the SmartSwitch series of products as a 
platform. The HSIM-W85 has 8 physical DS1 interfaces, providing 8 
separate logical DS1 connections. Eight separate T1 circuits can be 
configured, or the circuits can be combined into various Inverse 
Multiplexing (IMUX) groupings, up to a 12 Mbps full duplex data circuit 
within a Layer 2 IMUX group. 

The typical configuration is a head-end WAN aggregation point for up to 
8 T1s into a single WAN physical interface. The HSIM-W85 is able to 
uplink any combination of single T1s or multiple T1 IMUX groups to the 
backbone. Refer to 

The HSIM-W85 has its own i960 HD microprocessor used to process data 
packets, provide simple configuration, Inverse Multiplexer functionality, 
and statistics processing. The SmartSwitch host platform provides the 
required logical IP Host services. The HSIM-W85 is designed to be 
installed in any Cabletron Systems product that supports the High Speed 
Interface Module.

The HSIM-W85 operates in two modes:

 

Switching 

 

IMUX

The first mode, switching, is the default mode. The HSIM-W85 forwards 
data packets received by the host platform out through the logical DS1 
interfaces. It also forwards packets received in the DS1 interfaces to or 
through the host. The default and only layer 2 WAN protocol used with 
the HSIM-W85 is raw HDLC. 

 

The host platform may operate in 802.1D bridging, 802.1Q 
VLAN, or SecureFast mode.