Specifications

RADring
Installation & Operation Manual Functional Description
3/11/98 12:33 Access Modules Functional Description 2-23
TL-2/EDU
Module for Unshielded Twisted Pair (UTP) providing
RJ-45 connection. This version is intended for use with
common UTP cabling systems such as AT&T PDS
SYSTIMAX 1010, 1061 & 2061 cables, IBM Type 3 and
compatible 100Ω unshielded twisted pair cable. Each
lobe incorporates a media filter, complying with RFI and
impedance matching requirements. A RAD MF-3 media
filter should be used at the workstation end, if the
adapter card does not have an integrated media filter.
TL-2/EDSU
Module for Screened Twisted Pair providing shielded
RJ-45 connection. This module is compatible with 100W
screened UTP. A 150W version is available upon special
request
TL-2/F Two-port
Fiber-optic Lobe
Access Module
The TL-2/F provides a fiber-optic interface for connection of stations or
satellite hub/access units to the ring over fiber optic cable. Fiber-optic
cabling ensures future upgradability to high speed technologies together
with noise immunity, security and greater distances.
The TL-2/F operates in conjunction with the Token Ring fiber-optic
converters such as the TFC/SA or TFC/PC, which are located at the station
end of the fiber lobe. The various configurations supported by the TL-2/F are
shown in Figure 2-17.
Lobe Distances of up to 3 km can be achieved over multimode fiber cables.
The TL-2/F supports 50, 62.5 and 100 micron fibers, and either SMA
(default) or ST connectors. A special option is also available for a single mode
1300 nm version.
The lobe circuit of the TL-2/F is bypassed unless the remote equipment
requests access to the ring by transmitting an activate 'key'. In the case of
either cable link (TX or RX) being faulty, access is not granted and the lobe
circuit remains in bypass. If the attached equipment requires to exit the ring
it transmits a 'break' key to the TL-2/F causing the lobe circuit to revert to
bypass.
The TL-2/F can be used as a ring terminator when located at the right-hand
end of a RADring card group. This feature eliminates the need for the use of
Trunk I/O cards, allowing the RADring card group to operate as a completely
closed network.
The TL-2/F operates at a data rate of 4 or 16 Mbps at a wavelength of
850nm, and has a transmission range of 3 km/1.9 miles. The single mode
version operates up to 20 km.