OPTICAL SYSTEMS DESIGN
DOC ID: 10115303
OSD2251P OPERATOR MANUAL
PAGE 5
1
TECHNICAL SUMMARY
1.1
BRIEF DESCRIPTION
1.1.1
OVERVIEW
The OSD2251P is a 4-port industrial switch with redundant ring Gigabit Ethernet and PoE++ Source providing
simple network management with real-time monitoring. It has two 10/100/1000Base-T RJ45 copper ports and
two SFP ports for the ring.
The OSD2251P incorporates redundant ring technology providing maximum reliability on critical networks. In
the event of device or fiber failure the data path will automatically switch to a secondary path in less than 2ms
per hop to maintain ring network integrity.
The OSD2251P has Power over E+ (PoE++) function and operates as a Power Source Equipment (PSE).
The OSD2251P PoE++ can provide up to 60W to each RJ45 from PSE. The unit will operate on either
singlemode or multimode fiber. Operation over a network of hundreds of kilometers is possible by use of the
appropriate optical devices. It normally requires two fibers but is optionally available for one fiber operation.
A major benefit of the OSD2251P is its reliable and consistent performance over the -20°C to +75°C temperature
range that allows it to be used in uncontrolled environments such as roadside cabinets, mine sites and factories.
1.1.2
APPLICATIONS
▲
Any network utilising a mix of copper
and fiber
▲
Industrial IP communications
▲
Self-healing Gigabit Ethernet backbone
networks
▲
Networks using Power over Ethernet
devices such as cameras, intercoms, access
control, telephones, etc.
1.1.3
FEATURES AND BENEFITS
▲
Complies with IEEE802.3i/802.3u/ 802.3ab
10/100/1000Base-T, IEEE802.3u 100Base-Fx,
IEEE802.3z 1000Base-Lx/Sx standards
▲
Has a total of four ports: two fixed copper ports
for 10/100/1000Base-T and two SFP ports for
the fiber ring (100Base-Fx or 1000Base-X)
▲
A network diameter of hundreds of kilometers
is practical
▲
Ring reconfiguration in the case of cable or
switch failures takes less than two milliseconds
per hop
▲
OSDview Lite Network Management System
for ring version only
▲
MDI/MDIX Crossover: no need for crossover
cables
▲
Can be used with either singlemode or
multimode fiber over a variety of link budgets
▲
Available for operation over 1 or 2 fibers
▲
Auto-Negotiation for half or full duplex
operation
▲
Supports IEEE802.af/at Alternative A, and B
cable wiring
▲
Complies with the IEEE802.3af/at standard
including compliant powered device (PD)
signature detection and classification.
▲
Provides up to 60W to each RJ45 port
▲
Powered by either one or two non-critical 46 to
57V
DC
supplies
▲
Operates over the temperature range of -20°C
to +75°C
▲
Compatible with the OSD2244 and OSD2254
Gigabit Ethernet switches
▲
DIN rail Mounting
▲
Available for operation in ring or point to point
configuration
▲
SFP module sold separately
▲
Supports 10KB jumbo frames