Allied Telesis AT-FS238b/2 - Manual (Page 31)

AT-FS238a/x and AT-FS238b/x Series Installation Guide
21
Table 4 lists the cabling specifications for the fiber optic port when operating
in full-duplex mode. For information on the fiber optic port, refer to “Fiber
Optic Port Specifications” on page 39.
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, moisture-free, and has easy access the
data cables and power cord.
❑
Use dedicated power circuits or power conditioners to supply reliable
power to the device.
❑
Use one of the power sources described in “External Power Supply” on
page 9. For the 12-50VDC version, provide regulated DC power only
from a SELV power source 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, and that are suitable for
country of use.
Table 4 100Base-FX Fiber Optic Cabling Specifications (Full-duplex)
Model Cable Type 1
1. The fiber optic strand can be non-dispersion-shifted, dispersion-shifted, or non-zero dispersion-shifted single-
mode cable.
Maximum
Operating
Distance
2
2. 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 operating optical
wavelength.
Maximum
Allowable Loss
Budget
AT-FS238a/1 9/125 micron single-mode simplex 15 km (9.3 mi) 6 dB at 1310 nm
AT-FS238b/1 9/125 micron single-mode simplex 15 km (9.3 mi) 6 dB at 1310 nm
AT-FS238a/2 9/125 micron single-mode simplex 40 km (24.8 mi) 16 dB at 1310 nm
AT-FS238b/2 9/125 micron single-mode simplex 40 km (24.8 mi) 16 dB at 1310 nm