Allied Telesis AT-FS237 Specifications Download Page 2

AT-FS237

Fast Ethernet Single Strand Fiber Media Converter

STATUS INDICATORS

System LEDs:
Power 

Indicates power is applied to the converter

Per Fiber Port:
Link 

Indicates a valid receive link exists

Duplex 

Indicates full or half-duplex operation

Collision 

Indicates collision during packet
transmission on the port

Per Copper Port:
Link 

Indicates a valid receive link exists

Speed 

Indicates either 10 or 100Mbps operation

Auto 

Indicates port is set for auto-negotiation

FD/Collision 

Indicates collision during packet
transmission on the port.
Indicates full-duplex or half-duplex 
operation.

OPERATIONAL CHARACTERISTICS

Per fiber port:
Duplex 

Selects either full- or half-duplex operation

Per copper port:
Auto 

Selects auto-negotiation mode or manual 
setting

Duplex 

Forces port to full- or half-duplex 
operation (Auto setting = manual only)

Speed 

Forces port to 10 or 100Mbps operation
(Auto setting = manual only)

OPERATIONAL MODE

Missing Link (ML)
Smart Missing Link

TM

(SML)

Link Test

Packet Buffer 

28k per port

MAC address table  8k addresses
Forwarding/filtering rate 

148,880pps for 100Mbps
14,880pps for 10Mbps

Latency 

14.3µsec
(64 byte packet, 100Mbps full-duplex)

FIBER OPTIC PORT SPECIFICATIONS

Fiber Optic Transmitter

Fiber optic

Fiber Diameter

Optical

Launch Power (dBm)

2

Model 

Type

1

(Microns) 

Wavelength Min.

Avg.

3

Max.

AT-FS237s13/1 SMF 9/125 

1310nm -15.0 -11.0 

-8.0

1. SMF = Single-mode fiber.
2. Launch power is measured at one meter from the transmitter.
3. Launch power (Avg.) is power coupled into a Single-mode fiber.

Fiber Optic Receiver

Fiber optic

Fiber Diameter Optical  Receiver Sensitivity (dBm)

Model 

Type

1

(Microns)  Wavelength Max.

Avg. Saturation

AT-FS237s13/1 SMF  9/125 

1310nm  -30.0  n/a 

-8.0

1. SMF = Single-mode fiber.

Fiber Optic Datalink

Minimum Minimum Minimum

Fiber Power/Link 

Operating 

Operating

Model 

Type

1

Budget 

Distance

2

Distance

3

AT-FS237s13/1 

9/125 SMF 6.0dB 

15km (9.4mi)

1. SMF = Single-mode fiber.
2. The recommended mimimum range is stated in all cases where the maximum
transmitter output power exceeds the receiver’s saturation level. This is to prevent
blinding or burning out of the optical receiver on the far-end mode.
3. Distance is calculated based on ideal situations without any other loss factor.

Fiber Optic Loss Specification (Benchmark)

Fiber optic 

Optical

Typical

Fiber Type

1

Diameter 

Wavelength Loss Factor Bandwidth

SMF 9/125(microns) 1310nm

0.4dBm

n/a

1. SMF = Single-mode fiber.

POWER CHARACTERISTICS

Input supply voltage 12vDC or 12-50vDC
Rated currents .5A max.
Power consumption 24W max.

ENVIRONMENTAL SPECIFICATIONS

Operating Temp.

0°C to 40°C (32°F to 104°F)

Storage Temp.

-25°C to 70°C (-13°F to 158°F)

Relative humidity  (Operating) 5% to 90% non-condensing
Relative humidity  (Storage) 5% to 95% non-condensing
Operating & Storage Altitude 

Up to 3,048m (10,000ft)

PHYSICAL CHARACTERISTICS

Dimensions 

10.5cm x 9.5cm x 2.5cm
(4.12” x 3.75” x 1.0”)

Weight 

294g (10.4 oz)

ELECTRICAL/MECHANICAL APPROVALS

CE 

IEEE 802.3, IEEE 802.3u

Safety 

UL60950 (cULus)
EN60950
EN60825 (TUV)

Emission 

FCC Part 15 Class B
EN55022 Class B

Immunity EN55024

ORDERING INFORMATION

AT-FS237s13/1-xx

2-port single strand fiber media converter,
10/100TX (RJ-45) to 100FX (SC)
(1310nm TX/1310nm RX)
with 12vDC power supply and distances up to 15km

AT-PWR237-11

12vDC power supply with screw terminals

AT-EN237

Weatherproof enclosure

Where xx  = 10 AC power supply, US power cord

= 20 AC power supply, European power cord
= 30 AC power supply, UK power cord
= 40 AC power supply, Australian power cord

ABOUT ALLIED TELESYN

Allied Telesyn was founded in 1987 with the goal of producing reliable, standards-based 
networking products. Focused on Ethernet/IP solutions geared to applications, Allied Telesyn
offers access-edge products like switches, fiber/copper MAPs, and CPE.We’re also a leading
global manufacturer of media converters, unmanaged switches, and NICs. Our customer-driven
approach has made Allied Telesyn the ideal choice for IT professionals looking for high-quality,
feature-rich network solutions at a lower price. Allied Telesyn – It’s Our Network,Too.

www.alliedtelesyn.com

© 2004 Allied Telesyn International Corp. All rights reserved. Information in this document is subject to change without notice.
All company names, logos, and product designs that are trademarks or registered trademarks are the property of their respective owners.

617-00519-00 Rev. C

USA Headquarters

19800 North Creek Pkwy, Suite 200, Bothell, WA 98011, USA
Tel 800.424.4284 

Fax 425.481.3895 

European Headquarters

Via Motta 24, 6830 Chiasso, Switzerland    

(Corporate)

Tel (+41) 91 697.69.00 

Fax (+41) 91 697.69.11

(European Sales)

Tel (+39) 02 414.112.1 

Fax (+39) 02 414.112.61

FAST ETHERNET SINGLE STRAND FIBER MEDIA CONVERTER

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