Allied Telesis AT-FS238B/1 Data Sheet

Page of 2
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 
Per copper port:
Link
Indicates a valid receive link exists 
Speed
Indicates either 10Mbps or 100Mbps
operation
Auto
Indicates port is set for auto-
negotiation
FD/Collision
Indicates collision during packet
transmission on the port
Indicates full or half-duplex operation
Operational Characterisitcs
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 10Mbps or 100Mbps
operation
(Auto-setting = manual only)
Operational Mode
MissingLink (ML)
Smart MissingLink (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)
Power Characteristics
Input supply voltage 
12vDC or 12-50vDC
Rated currents 
.5A max.
Power consumption 24W 
max.
Physical Characteristics
Dimensions 
10.5cm x 9.5cm x 2.5cm
(4.12" x 3.75" x 1")
Weight 
294g (10.4 oz)
Fiber Optic Port Specifications
Fiber Optic Transmitter
Fiber Optic Receiver
Fiber Optic Datalink
Fiber Optic Loss Specification (Benchmark)
Environmental Specifications
Operating temp.
0°C to 40°C (32°F to 104°F)
Storage temp.
-20°C to 70°C (-13°F to 158°F)
Relative humidity 
5% to 90% non-condensing
(operating)
Relative humidity 
5% to 95% non-condensing
(storage)
Operating and 
Up to 3,048m (10,000 feet)
storage altitude
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  
AT-FS238 
| 2 Port Fast Ethernet Single Strand Speed/Media Converting Switch
USA Headquarters 
|
19800 North Creek Parkway 
|
Suite 200 
|
Bothell 
|
WA 98011 
|
USA 
|
T: +1 800 424 4284 
|
F: +1 425 481 3895
European Headquarters 
|
Via Motta 24 
|
6830 Chiasso 
|
Switzerland 
|
T: +41 91 69769.00 
|
F: +41 91 69769.11
Asia-Pacific Headquarters 
|
11 Tai Seng Link 
|
Singapore 
|
534182 
|
T: +65 6383 3832 
|
F: +65 6383 3830
www.alliedtelesis.com
© 2007 Allied Telesis Inc. 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.
617-00520 Rev E
Ordering Information
AT-FS238A/1-10
2 port single strand fiber media converter, 10/100TX
(RJ-45) to 100FX (SC) (1310nm TX/1550nm RX) with
12vDC power supply and distances up to 15km 
AT-FS238A/2-10 
2 port single strand fiber media converter, 10/100TX
(RJ-45) to 100FX (SC) (1310nm TX/1550nm RX) with
12vDC power supply and distances up to 40km 
AT-FS238B/1-10 
2 port single strand fiber media converter, 10/100TX
(RJ-45) to 100FX (SC) (1550nm TX/1310nm RX) with
12vDC power supply and distances up to 15km
AT-FS238B/2-10 
2 port single strand fiber media converter, 10/100TX
(RJ-45) to 100FX (SC) (1550nm TX/1310nm RX) with
12vDC power supply and distances up to 40km 
Associated Products
AT-PWR237-11 
12vDC power supply with screw terminals 
Model
Fiber Type
1
Fiber Optic
Diameter
(Microns)
Optical
Wavelength
Launch Power (dBm)
2
Min.
Avg.
2
Max.
AT-FS238a/1
SMF (SC)
9/125
1310nm
-15.0
-11.0
-8.0
AT-FS238a/2
SMF (SC)
9/125
1310nm
-8.0
-5.0
-2.0
AT-FS238b/1
SMF (SC)
9/125
1550nm
-15.0
-11.0
-8.0
AT-FS238b/2
SMF (SC)
9/125
1550nm
-8.0
-5.0
-2.0
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
Model
Fiber Type
1
Fiber Optic
Diameter
(Microns)
Optical
Wavelength
Receiver Sensitivity (dBm)
Max.
Avg.
Saturation
AT-FS238a/1
SMF (SC)
9/125
1550nm
-30.0
n/a
-7.5
AT-FS238a/2
SMF (SC)
9/125
1550nm
-33.0
n/a
-2.0
AT-FS238b/1
SMF (SC)
9/125
1310nm
-30.0
n/a
-7.5
AT-FS238b/2
SMF (SC)
9/125
1310nm
-33.0
n/a
-2.0
1 SMF = Single-mode fiber
Model
Fiber Type
1
Minimum
Power/Link
Budget
Minimum
Operating
Distance
2
Minimum
Operating
Distance
3
AT-FS238a/1
9/125 SMF 
6.0dB
0
15km (9.4mi)
AT-FS238a/2
9/125 SMF 
16.0dB
0
40km (9.4mi)
AT-FS238b/1
9/125 SMF 
6.0dB
0
15km (9.4mi)
AT-FS238b/2
9/125 SMF 
16.0dB
0
40km (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 Type
1
Fiber Optic
Diameter
(Microns)
Optical
Wavelength
Typical
Loss
Factor
Bandwidth
SMF (SC)
9/125
1310nm 0.4dBm
n/a