Specifications

3-3
TOKEN RING DEVICES AND APPLICATIONS
Media Flexibility and Conversion
Token Ring networks can be wired with different types of media.
Cabletron Systems series of Token Ring Port Interface Modules (TPIMs),
shown and listed in Figure 3-2, provide a method to interchange port
interfaces supporting different media types for devices that support TPIM
installation.
Figure 3-2. TPIMs
TPIM specifications are listed in Table 3-1. Conversion products such as
the TRFOT-2, a twisted pair-to-fiber optic converter, enable you to connect
cabling of certain media types to a device supporting another media type.
Switches and Bridges
Token Ring bridges and switches are used to link separate rings, even if
they are operating at different speeds. The TRBMIM-T, for example, is a
Source Routing bridge that provides connections between two Token
Ring/802.5 networks. The Token Ring network connected at the
TRBMIM-T front panel is linked to the Token Ring network operating on
the FNB within the MMAC. The TSX-1620 is a standalone switch that
provides a method to link as many as sixteen Token Ring networks.
Table 3-1. TPIMs and Media Types
TPIM Media Type Connector Type
TPIM-T1 Shielded Twisted Pair DB9
TPIM-T2 Unshielded Twisted Pair RJ45
TPIM-T4 Shielded Twisted Pair RJ45
TPIM-F2 Multimode Fiber Optic ST
TPIM-F3 Single-Mode Fiber Optic ST
TPIM-T1TPIM-F2/F3 TPIM-T2/T4