Transcript
S-TAU Smart Trunk Access Unit
•
• •
FEATURES
•
• Compatible with IBM Token • • • • • • •
Ring at 4 or 16 Mbps Complies with IEEE 802.5 standard No external power required Lobe insertion LEDs Supports 8 workstations Optional built-in repeaters 1U height for minimal rack space RJ-45 or IBM data connectors
DESCRIPTION
•
S-TAU, Smart Trunk Access Unit, provides direct physical and electrical connection between workstations and the Token Ring network. Functioning as a passive wiring concentrator, S-TAU offers star-shaped ring topology for eight users. For larger networks, several S-TAUs can be linked together by connecting Ring In/Ring Out expansion ports.
•
•
Insert and bypass functions are provided within the unit. Insertion of a workstation into the ring occurs when the workstation's network interface card or adapter provides a DC current across the lobe cable to the lobe port of S-TAU. The station only accesses the ring if the adapter and cable are fully operational. Each lobe is equipped with a status LED indicator, indicating that a station is actively inserted into the ring, thus simplifying diagnostics and troubleshooting. Bypassing of a lobe occurs automatically whenever the lobe cable connection is removed or the station becomes inactive or exits the network. Several options are available for installation at either the Ring In (RI) or the Ring Out (RO) ports. These include: − TFCs, Fiber Optic Converters, which allow fiber connection between adjacent S-TAUs, or enable lobe connection of S-TAU using fiber. − TFRs, Fiber Optic Repeaters, which extend the distance between adjacent S-TAUs to 3 km. − TCRs, Copper Repeaters, which extend the distance between adjacent S-TAUs to 750m on Type 1 cable.
•
S-TAU operates without external power. However, an external power supply is required for each RI or RO option above (see Ordering). S-TAU is installed in a 19" rack mount enclosure. The unit height is only 1U (1.75"), requiring minimal rack space. The standard S-TAU is provided with IBM data connectors for use in an IBM cabling environment. Optionally, RJ-45 connectors can be supplied, for connection of Unshielded Twisted Pair (UTP), while retaining the self-shorting (bypass) feature. To ensure proper operation of S-TAU, a TST pre-installation setup tool should be used. This small universal tool should be ordered separately (see Ordering).
SPECIFICATIONS ELECTRICAL
•
Phantom Circuit Operating voltage: 3.5 to 7 Operating current: 1.0 mA @ 5V DC resistance Tx to Rx*: 4.7 ± 0.2 kΩ Insertion time: 5 sec max Removal time: 50 to 200 msec
•
Insertion Loss (maximum) 0.5 - 4 MHz 4 - 16 MHz 16 - 32 MHz
RI to RO
0.30 dB
0.6 dB
1.2 dB
Tx to Rx*
0.65 dB
1.3 dB
2.6 dB
RI to Rx
0.55 dB
1.1 dB
2.2 dB
Tx to RO
0.55 dB
1.1 dB
2.2 dB
S-TAU Smart Trunk Access Unit •
Crosstalk (maximum) 0.5 - 4 Mhz
Tx to Rx*
4 - 16 MHz
43 dB
37 dB
Bypassed lobe to main path
43 dB
37 dB
Main path to backup path
47 dB
41 dB
•
20 dB
•
40 dB
•
12 - 24 MHz
14 dB
11 dB
Common Mode Rejection (minimum)
1 -6 MHz
•
6 - 12 MHz
6 -12 MHz
• •
•
Return Loss (minimum) RI to any lobe
1 - 6 MHz
& Specify connector type: RJ45 for RJ-45 connector (Default is IBM data connector)
GENERAL Indicators Eight LED indicators, showing activity at each lobe port. Physical Height: 44 Width: 482 Depth: 174 Weight: 2.2
Note: All RI/RO options require PS-115/7.5/800 or PS-230/7.5/800 power supply.
mm / 1.7 in (1U) mm / 19 in mm / 6.8 in kg / 4.8 lb
ACCESSORIES
Environment Temperature: 0 to 50°C/32-122°F Humidity: Up to 90%, non-condensing
* Tx to Rx applies to each lobe.
25 dB
Connectors Standard unit: Ten 4-position data connectors Unit with RJ-45 option: Ten self-shorting RJ-45 connectors Power No AC power required. Each RI/RO option requires an external power supply of 7.5V @ 800 mA (see Ordering).
ORDERING S-TAU/+/$/& Trunk Access Unit + Specify Ring In option: IF16 for TFR Fiber Optic Repeater IC16 for TCR Copper Repeater IT for TFC Fiber Optic Converter $ Specify Ring Out option: OF16 for TFR Fiber Optic Repeater OC16 for TCR Copper Repeater OT for TFC Fiber Optic Converter
PS-230/7.5/800 230 VAC power supply (for all RI/RO options) TST Pre-installation Setup Tool
12 - 24 MHz
28 dB
PS-115/7.5/800 115 VAC power supply (for all RI/RO options)
TST/RJ-45 Pre-installation Setup Tool for S-TAU with adapter cable for RJ-45 connectors Note: One TST tool may be used for any number of S-TAUs.
MF-3 Type-3 Media Filter
APPLICATION
590-100-07/99
1999 RAD Data Communications Ltd.
Specifications are subject to change without prior notice.
