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1992-05-16
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HP Fiber-Optic Hub Plus, Technical Data
Product Number 28682A
The HP Fiber-Optic Hub Plus is a multiport, fiber-optic repeater for use
in Ethernet and IEEE 802.3 local area networks. It is a "plug and play"
8-port hub that gives you a fully manageable, scalable, and flexible
networking solution for 10-Mbit/s fiber-optic connections. The
HP Fiber-Optic Hub Plus conforms to the IEEE 802.3 FOIRL standard for
fiber-optic inter-repeater links.
The HP Fiber-Optic Hub Plus is well suited to both backbone
applications and direct system connections. Choose fiber-optic
networking for high data security, noise immunity, long distance, and
future expansion. Choose the HP Fiber-Optic Hub Plus for HP reliability
and the confidence you need for your network applications.
The HP Fiber-Optic Hub Plus is part of the HP EtherTwist family of
network components. These LAN components - hubs, bridges, adapter cards,
and transceivers - provide your network with high performance in a
low-cost hardware solution. Easily racked together and connected with a
thin coaxial cable between their integrated BNC ports, the hubs merge
with one another along a virtual extended backplane. This gives you full
cardcage-like functionality without the expense and limitations of a
cardcage design. Using only a few different hardware components, each
designed for optimum price/performance, you can build a network that
ranges from a few nodes to thousands.
Features
o Provides eight fiber-optic ports using ST connectors. The built-in AUI
port can be converted into a ninth fiber-optic port using a
fiber-optic transceiver (HP 28683A).
o Complies with IEEE 802.3 FOIRL standard.
o Supports 10-Mbit/s link speed.
o Supports both 62.5/125 +m and 50/125 +m optical fiber.
o Supports 1 km of fiber-optic cable. Greater distances are possible
depending on network configuration.
o Includes BNC and AUI ports for simultaneous connection to both thin
coaxial cable and (via transceiver) thick coaxial, fiber-optic, or
twisted-pair cable.
o Supports both IEEE 802.3 and Ethernet 1.0 and 2.0 standards.
o Isolates network faults by automatically segmenting ports disturbing
the network.
o Includes LEDs for a quick visual check of port status, collisions,
activity, and power.
o Provides console (RS-232) port, which allows users to read network
statistics and configure ports in the hub. This port connects to a
terminal or terminal emulator either directly or via modem.
o Includes diagnostics for checking port functionality and loopback test
for trouble-shooting cable problems.
o Is transparent to network operating system software.
o Follows simple design rules for maximum topological flexibility.
o Supports SNMP/IP-based network management. Specifically, the hub can
be managed from a centralized network management station on the LAN
using HP OpenView Hub Manager (HP 28686D).
o Mounts on wall (flat or on end) or mounts in 19-inch Telco rack with
cables facing front or back.
5
Fiber-Optic LAN Solutions
Networking applications for fiber-optic cabling have evolved from
primary uses as a backbone between buildings in a campus setting to
include building backbones and, with increasing frequency, direct
connection to systems at the desk.
Backbone applications
Acting as an active star repeater, the HP Fiber-Optic Hub Plus is ideal
for use in campus or building backbones.
[Figure: HP Fiber-Optic Hub Plus, caption: none]
By supporting eight fiber-optic segments of up to 1 km, backbones from a
single hub can span a 2-km distance. To increase the segment count, one
more fiber-optic port can be added to the hub by simply plugging an
HP Fiber-Optic Transceiver into the AUI port. Alternatively, more hubs
can be added by multi-dropping them from a coaxial backbone cable.
System connections
A fiber-optic connection can be made directly to a system through a
fiber-optic transceiver (HP 28683A) attached to the AUI port of the
system's LAN adapter card. Each fiber-optic port on the HP Fiber-Optic
Hub Plus will support one node. The hub's AUI port can be transformed
into an additional fiber-optic port by attaching a fiber-optic
transceiver. For larger networks, multiple hubs can be multi-dropped or
cascaded to increase the port count.
Flexible Cabling
HP's versatile hardware architecture provides the HP Fiber-Optic Hub
Plus with flexible connections to both subnets and backbones. You can
multi-drop several hubs on a thin coaxial "backplane" via their ThinLAN
(BNC) ports. In addition, you can cascade hubs with fiber-optic cabling
using either a direct connection between fiber-optic ports on each hub
or using a fiber-optic to AUI connection through a fiber-optic
transceiver (HP 28683A).
Maximum Reliability Through Diagnostics and Fault Isolation
To ensure network integrity for critical backbone applications, an
HP Fiber-Optic Hub Plus automatically identifies any segment disturbing
the network and disconnects it from the rest of the network
(autosegmentation). Once the problem is corrected, the hub automatically
reconnects the segment.
Visual diagnostic LEDs on the hub aid in troubleshooting the network.
Status LEDs indicate power, data activity, faults, and collisions; and
port LEDs indicate normally functioning ports. If a port has been
autosegmented, its status is communicated via a flashing port LED and a
fault LED.
Control of Your Network With Hub Management
The HP Fiber-Optic Hub Plus supports SNMP/IP and can communicate over
the LAN with HP OpenView Hub Manager for DOS (HP 28686D). From a single
network management station, a network administrator can monitor and
control any hub - an HP EtherTwist Hub Plus or an HP Fiber-Optic Hub
Plus - on the network. The HP OpenView Bridge Manager product allows
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similar monitoring and control of HP bridges on the network. These
device manager programs continuously update HP OpenView Windows'
graphical network map to display the current state of the network and
notify the network administrator of network events. Configuring,
monitoring, and controlling the entire network is made easy with the
HP OpenView network managers.
Basic hub management features are also available through the hub's
out-of-band console (RS-232) port either locally or remotely via modem.
Management features available through the console port include enabling
and disabling of ports, reading of port status and counters, link test,
hub reset, loopback test, and Internet protocol (IP) configuration.
Coupled with HP OpenView Resource Manager, HP Fiber-Optic Hubs are
capable of providing instrumentation-like functions across your network.
This will eliminate the need for a LAN analyzer per segment. HP EASE
(Embedded Advanced Sampling Environment) is a breakthrough technology
that allows HP EtherTwist devices to do protocol analysis. This will
identify top talkers, heavy users, errors, communications pairs.
Specifications
Environmental Characteristics
Operating Temperature: 0 degrees C to 55 degrees C (32 degrees F to 131
degrees F)
Relative Humidity: 15% to 95% at 40 degrees C (104 degrees F)
noncondensing
Optical Characteristics for 62.5/125 +m Fiber
Wavelength: 820 nm
Optical budget: 10 dB
Transmitter power:
- 12 dBm nominal
- 17 dBm minimum
Receiver sensitivity:
- 30 dBm nominal
- 27 dBm minimum
Optical Characteristics for 50/125 +m Fiber
Wavelength: 820 nm
Optical budget: 6 dB
Transmitter power:
-16.5 dBm nominal,
-21 dBm minimum
Receiver sensitivity:
-30 dBm nominal,
-27 dBm minimum
Physical and Electrical Characteristics
Dimensions: 42.55 cm by 23.50 cm by 4.37 cm (16.75 in by 9.25 in by
1.72 in)
Weight: 2.72 kg (6.0 lb)
Power Consumption:
ac Voltage 100-120 V 220-240 V
Current 0.5 A max 0.4 A max
Frequency 50/60 Hz 50/60 Hz
7
Standards
Communications:
IEEE 802.3 FOIRL
IEEE 802.3 Type 10BASE2
Emissions:
FTZ 1046/84
VCCI Class 1
FCC Part 15 Class A
CISPR-22 Level A
Safety:
UL 1950
IEC 950/EN60950
CSA 220
CSA 950
Radiated Emission Immunity: IEC 801-2.3.4
Warranty
The HP 28682A Fiber-Optic Hub Plus is warranted for one year against
defects. Check with your local Hewlett-Packard Sales and Support Office
or your Authorized HP LAN Dealer for more information.
Ordering Information
HP 28682A Fiber-Optic Hub Plus
From HP Networking Communications Specification Guide,
5091-3821E, 9205, p 550
Associated files: A3821550.DOC, la3821gz.plt, la3821gz.gal
HP Fiber-Optic Hub Plus, Technical Data