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OSU 300
Multiport Optical Service Unit
Product Features
■ Multiport OSU (Optical
Service Unit)
■ Single and multi-mode
fiber optics
■ For distances up to 40 km
on single-mode fiber and
2 km on multi-mode fiber
■ Four user-configurable
data ports
■ Built-in HSSI (High Speed
Serial Interface)
■ Optional HSSI module
■ Optional high-speed V.35
interface options
■ Optional Bridge
module for high-speed
LAN-to-LAN connectivity
■ Automatic or manual
remote configuration
■ Embedded SNMP and
Telnet via Ethernet or
SLIP/PPP
■ Detailed performance
monitoring (local and
remote)
■ VT100 menu structure
simplifies configuration
■ DC powered with optional
AC adapter available
■ Industry-leading five-year
North American warranty
The ADTRAN
®
OSU 300
™
is a cost-effective
point-to-point fiber product that supports
data rates up to 44.2 Mbps, providing users
up to four DTE data ports. This multiport
OSU provides access to private single-mode
and multi-mode fiber and allows users
to share the bandwidth between multiple
applications. The single-mode version
has a 1310 nm laser with SC type connectors
and a maximum range of 40km, while
the multi-mode version has a 1310 nm
LED, a maximum range of 2km and ST
type connectors.
The OSU 300 has one HSSI (High Speed
Serial Interface) port built into the chassis.
Expansion slots for up to three additional
DTE interfaces accept optional field-upgrade-
able interface modules. The modules can be
either HSSI, high-speed V.35, or an Ethernet
Bridge module. The HSSI ports support rates
from 75 kbps to 44.2 Mbps, while the high-
speed V.35 ports support rates from 75 kbps to
10 Mbps; both in 75 kbps increments. The
Bridge module provides four auto-sensing
10/100 Base-T Ethernet ports. Up to three
modules can be supported in a single chassis.
The Quad Bridge module provides LAN-to-
LAN connectivity using bridging over the
WAN. Additionally, this module acts as a LAN
switch to provide Layer 2 Ethernet switching
between each of the ports on the module. The
OSU 300 offers complete configuration, diag-
nostic, and performance monitoring through
a VT100 terminal, SNMP, or Telnet.
A series of front panel LEDs indicate the
status of the network connection, along with the
state of each of the four DTE ports. SNMP traps
notify SNMP management platforms of alarm
conditions. External alarm contacts provide
connection to a visual or audible alarm.
The OSU 300 includes VT100 terminal inter-
faces on both front and rear panels. Inband
remote configuration to a remote unit across
the fiber can be performed manually by the user,
or automatically by the host OSU 300 unit.
Time-of-day automatic reconfiguration allows
customers to assign or reallocate bandwidth to
applications based on the time of day, ensuring
that the broadband circuit is always optimized.
Embedded SNMP and Telnet are available
via either the 10BaseT Ethernet port or SLIP/PPP.
The OSU 300 can be configured, monitored,
and diagnosed using standard SNMP network
management programs.