Specifications

3.6 Brouters
Network Modules 3–59
3.6 Brouters
Digital has an interoperable family of flexible, full- function local, and wide area
network multiprotocol brouters. The following modules are available for use in the
DEChub platforms or as standalone devices.
• DECbrouter 90T1
• DECbrouter 90T2
• DECbrouter 90T2A
3.6.1 DECbrouter 90T1, 90T2, and 90T2A
The DECbrouter 90T provides a multiprotocol internetworking solution for linking
small and medium sized Ethernet networks. The module provides full-featured
remote routing of the most widely implemented communication protocols. The
DECbrouter T also supports concurrent bridging and bidirectional protocol
translation between TCP/IP, X.25 and Local Area Transport Environments. Figure
3–19 shows the DECbrouter 90T1 and DECbrouter 90T2 network modules.
The software supports leased line, circuit switched, or packet switched networks
such as X.25, Switched Multimegabit Data Service (SMDS) or Frame Relay. The
module is well suited for remote applications between branch offices and district or
regional offices. Three variants of the DECbrouter 90T are available. They support a
wide range of Serial line standards as shown in Table 3–1.
Table 3–1 Comparison of Supported Serial Line Standards
DECbrouter 90T1 DECbrouter 90T2 DECbrouter 90T2A
EIA-530A EIA-530A
RS-232/V.28 RS-232/V.28 RS-232-V.28
RS-449/RS-422/V.11 RS-449/RS-422/V.11
RS-449/RS-422/V.10 RS-449/RS-422 /V.10
V.35 V.35
V.36 V.36
X.21 Leased Lines X.21 Leased Lines X.21 Leased Lines