Allied Telesis AT-FS238a/2 - Manual (Page 27)

AT-FS238a/x and AT-FS238b/x Series Installation Guide
15
❑
Refer to Table 4 for the cabling specifications for the fiber optic port
operating in full-duplex mode.
Note
Refer to “Fiber Optic Port Specifications” on page 29 for additional
information on the fiber optic port.
Selecting a Site
Be sure to observe the following guidelines when selecting a site for your
bridging converter.
❑
Select a site that is dust-free and moisture-free.
❑
Select a site that will allow you to easily access the data cables and
power cord.
❑
Use dedicated power circuits or power conditioners to supply reliable
power to the device.
❑
Use the power sources as described in “External Power Supply” on
page 3.
❑
For 12-50VDC version, provide regulated DC power only from SELV
sources per IEC 60950, such as regulated power supplies.
Note
Use only power sources that are UL Listed (QQGQ or EPBU), TUV
Licensed or other Safety Agencies approved, suitable for country of use.
Table 4 100Base-FX Fiber Optic Cabling Specifications (Full-duplex)
Model Cable Type
Maximum
Operating
Distance
1
1. Maximum distance for 100 Mbps optical datalinks is dependent on the following factors: quality of fiber optic,
duplex mode of both end-nodes, and maximum optical loss budget for the optical fiber at each optical wavelength.
Maximum
Allowable Loss
Budget
AT-FS238a/1 9/125 micron SMF Simplex 15 km (9.3 mi) 6 dB at 1310 nm
AT-FS238b/1 9/125 micron SMF Simplex 15 km (9.3 mi) 6 dB at 1310 nm
AT-FS238a/2 9/125 micron SMF Simplex 40 km (24.8 mi) 16 dB at 1310 nm
AT-FS238b/2 9/125 micron SMF Simplex 40 km (24.8 mi) 16 dB at 1310 nm