The FOI-STS1 provides complete electrical isolation for STS-1 SONET communications.
Applications Include:
- SONET Add/Drop Multiplexers (ADMs)
- PDH Equipment
- ATM WAN access routers and switches
The unit can be used in areas of high electrical noise or in and out of RF shielded enclosures. The fiber optic cable is not susceptible to interference caused by impulse noise, crosstalk, or EMI. Privacy of communications is also enhanced because the fiber optic cable does not radiate any emissions.
In addition, fiber optic cable offers much longer transmission distances than copper wiring. Traditional STS-1 coax cabling is limited to a maximum distance of 1100ft (335m), but multimode optics on the unit can extend the distance to 2km, while singlemode optics can further extend the distance to 20km. A typical link consists of two FOI-STS1, one at each end of the network, with a duplex fiber optic cable between them.
Flexible Mounting and Powering Options
The FOI-STS1 is part of the FOI line of products designed for ruggedized mil applications. It is housed in the familiar FOI shielded can enclosure. For standalone applications it can be powered by adding a PSQ‐4909 AC supply or a PSQ‐4920 DC power supply (not included). Optionally, up to 8 FOI units can be mounted on CMA chassis adapters and installed in an RMC‐3101 or RMC‐2101 rack mount chassis. The units are powered redundantly by a common back plane connection.
- E3 communications.
- Satisfies K41 protection specifications for STS-1 systems.
Compliant with:
- Telcordia GR-253-CORE
- ITU-T G.775 for loss of signal
ELECTRICAL SPECIFICATIONS | ||||||
Min
|
Typ
|
Max
|
||||
Power Requirement | Voltage Range (V) |
7
|
9
|
12
|
||
Supply Current (mA) |
-
|
300
|
-
|
|||
Data Rate | 51.84 Mbps | |||||
Line Encoding | AMI (Alternate Mark Inversion) / B3ZS (Binary 3 Zero Substitution) | |||||
Environmental | Storage Temperature (°C) |
-40
|
-
|
85
|
||
OperatingTemperature (°C) |
0
|
-
|
50
|
|||
Interface Connector | BNC | |||||
PHYSICAL SPECIFICATIONS | ||||||
Length
|
Width
|
Height
|
Weight | |||
Case Dimensions | Size 4 |
4.5 in (114 mm)
|
1.453 in (37 mm)
|
2.562 in (65 mm)
|
2 lb (0.9 kg)
|
|
OPTICAL CHARACTERISTICS | ||||||
Fiber
|
Size
|
Max Distance
|
Wavelength
|
Output Power
|
RX Sens | Loss Budget |
Multimode
|
62.5 / 125 μm
|
2 km (10Base) 300m (100Base)
|
820 nm
|
-18 dBm
|
-30 dBm | 12 dB |
Singlemode | 9 /125 μm | 20 km | 1300 nm | -15 dBm | -32 dBm | 17 dB |

Standalone Operation | |
PSQ-4909 | Standalone AC Power Supply |
PSQ-4920 | Standalone DC Power Supply |
WMA-3002 | Wall Mount Adapter |
WMA-2001 | Wall Mount Adapter with ST Optical Patch |
Chassis Mounting | |
RMC-2101 | 2U, 19" Rack Mount Chassis. Holds up to 9 FOI Modules |
CMA-2001 | Chassis Mount Adapter for RMC-2101 Chassis. (1) per FOI Module required |
PSM-2010 | Spare Power Supply for RMC-2101 |
RP2 | 16 Channel Modular Bolt-On Connector Panel for RMC-2101 |
RMC-3101 | 3U, 19" Rack Mount Chassis. Holds up to 9 FOI Modules |
CMA-3002 | Chassis Mount Adapter for RMC-3101 Chassis. (1) per FOI Module required |
PSM-3010 | Spare Power Supply for RMC-3101 |
Industrial Solutions | |
RMC-3700 | Environmental Enclosure for FOI Modules |
CMA-3002 | Chassis Mount Adapter for RMC-3101 Chassis. (1) per FOI Module required |
PSM-3010 | Spare Power Supply for RMC-3101 |