STM-1 155Mbit/s services are normally delivered via singlemode fibre from the core SDH network. The presentation of STM-1 to the user by the Service Provider can be BNC, to avoid the need to use an expensive singlemode fiber interface on the router.

If the user equipment has a multimode fiber interface, then conversion from multimode to BNC, again, is cheaper than either a G703 or multimode fiber interface on the user equipment.

The FC4X00 from Metrodata offers solutions to these and other application opportunities. Service provision of STM-1 on BNC connectors, singlemode fiber delivery is made possible by the FC4100 for shorthaul, and the FC4200 longhaul, whilst multimode fiber equipment interfaces can connect to G703 STM-1 with the FC4000.

Where presentation of SDH bandwidth needs to be, or is BNC at 155Mbit/s, the Metrodata FC4X00 range of fiber converters offer low cost easily installable solutions. Here is a clear opportunity to support high speed services from SDH cores via fiber at the interface desired and at lower cost.

Front: FC4X00 STM-1/OC-3 Fiber Converter

Rear: FC4000 Multimode Fiber to STM-1/OC-3

As the demands for on-site communication increase, certainly in the IP arena, fiber cable becomes the attractive solution in capacity, cost and quality. The FC4X00 is designed to need minimal installation in a desk-top or rack situation, and have integral power supply, and so are self-contained – just connect the fiber, BNC connectors and power and the FC4X00 transports data at STM-1 rate of 155Mbit/s.

The FC4X00 provides a clear STM-1/OC-3 path over the fiber, which means that the signal can be either framed or unframed and all protocols are transported transparently.

All Metrodata fiber converters are supplied as standard with SC connectors operating at a nominal wavelength of 1300nm. Other wavelengths are available on request, e.g. 850nm, 1550nm, 1550/1300 WDM. Other connectors are also available on request, e.g. ST, FC.

The FC4X00 range can easily be rackmounted in either a 1U two unit rackmount kit, 1U quad (4 x FC4X00) box or in a 6U eighteen unit rackmount kit .

Also available in modular form for our 4U 12 slot managed centralised management option - MetroRack.

Product Features

• Low cost 155Mbps fiber to BNC
• Ideal for connecting 2 ATM switches on an SDH network
• Converts optical signals to BNC electrical for transmission over an SDH network
• Transparent Payload
• Clear Channel - Framed/Unframed signal
• External Alarm relay ports
• Short Haul & Long Haul Single mode and Multi mode fiber interfaces
• Compact unit with integral power supply
• Easy to install & maintain
• Rack mounting kits for 2 or 18 units available
• Quad option available - 4 FC4x00 fiber converters in 1U box

Application Diagram

FC4X00 Application Diagram: Multimode Fiber to Singlemode Fiber via an STM-1/OC-3 link

FC4000: Connecting a Multimode-Interfaced router to BNC-presented STM-1

FC4000: Connecting an ATM switch with Multimode interface to a BNC STM-1 service

FC4100: Remote connection of a router via a campus network to a BNC-presented STM-1 service

Specifications

STM-1 Electrical Interface
Port	G.703
Interface	Dual BNC (75ohm)
Line Coding	CMI
Bit Rate	155 Mbps +/- 15ppm
Barrier	Fully barrieres per EN41003
Cable Lengths	RG59 = 70m
	UR202 = 80m

Multimode Fiber Interface
Port	G.957
Interface	Dual SC Multimode 62 5/125um
Bit Rate	155 Mbps +/- 15ppm
Tx Power	-14 to -19 dBm
Max Rx Power	-14 dBm
Rx Sensitivity	-14 to -30 dBm
Optical loss budget	-19 - (-30) = 11 dB

Singlemode Short Haul Fiber Interface
Port	G.957
Interface	Dual SC singlemode 8/125um
Bit Rate	155 Mbps +/- 15ppm
Tx Power	-8 to -15 dBm
Max Rx Power	-8 dBm
Rx Sensitivity	-8 to -31 dBm
Optical loss budget	-15 - (-31) = 16 dB

Singlemode Long Haul Fiber Interface
Port	G.957
Interface	Dual SC singlemode 8/125um
Bit Rate	155 Mbps +/- 15ppm
Tx Power	0 to -5 dBm
Max Rx Power	-8 dBm (may need an attenuator)
Rx Sensitivity	-8 to -34 dBm
Optical loss budget	-5 - (-34) = 29 dB

Compliance & Approvals
Safety	EN60950
EMC	EN55022, EN50082

Environment
Temperature	0 - 45 deg C
	0 - 95% RH, non condensing
Pressure	86 - 106 KPA

Power Supply Options
-48 VDC	-40 to -72 DC, 200 - 100 mA
AC Mains	100 - 250v AC, 50 - 400Hz, 65 - 25mA IEC connector
Power Consumption	4.5 watts approx when operating

Packaging
Type	Modem, 1U high without feet

Dimensions W x D x H (mm)
Rackmount	202 x 132 x 44 (without feet)
Tabletop	202 x 132 x 48 (with feet)

Ordering Information

	Part Number
Product	AC Mains: 100 - 250 VAC	DC Power: - 48 VDC
FC4000 Multimode to STM-1/OC-3	80-05-915	80-21-915
FC4100 Singlemode shorthaul to STM-1/OC-3	80-05-916	80-21-916
FC4200 Singlemode longhaul to STM-1/OC-3	80-05-917	80-21-917
2 Unit Rackmount Kit	80-05-256	80-05-256
18 Unit Rackmount Kit	80-05-250	80-05-255
Quad 1U FC4000	80-405-915	80-421-915
Quad 1U FC4100	80-405-916	80-421-916
Quad 1U FC4200	80-405-917	80-421-917