Allied Telesis AT-PBC18 - Manual (Page 71)

PowerBlade PBC18 Installation Guide
71
Link Test
Back-to-back/
Standalone
Button
The Link Test Back-to-back/Standalone (LT BB/LT SA) button on the
AT-PB1000 Series Media Converters is used together with the Link
Test/MissingLink feature when performing a link test on the media
converter. You use the LT BB/LT SA button to configure the module to
match the topology in which you installed the module. The two possible
network topologies for the media converter, back-to-back and
standalone, are described in
Network Topologies on page 49. The LT
BB/LT SA button must be set correctly in order for a link test to be
performed accurately. To perform a link test, refer to
Troubleshooting on
page 99.
Caution
AT-PB1000 Series Media Converters will not pass network traffic
when a link test is being performed, thus possibly disrupting
network operation. Only when the LT/ML button or switch is in the
ML position will the media converter pass network traffic.
Cable
Specifications
Table 25 lists the cabling specifications for the AT-PB1000 Series Media
Converters.
Table 25 Fiber Optic Port Cabling Specifications
Model Cable Maximum Distance
1000Base-SX Port
All Models 62.5/125 µm multimode fiber 275 m (902 ft)
50/125 µm multimode fiber 550 m (1,804 ft)
1000Base-LX Port
AT-PB1001/1 62.5/12 5 µm multimode fiber 550 m (1,804 ft)
50/12 5 µm multimode fiber 550 m (1,804 ft)
10/125 µm single-mode fiber 10 km (6.2 mi)
AT-PB1001/2 10/125 µm single-mode fiber 25 km (15.5 mi)
AT-PB1001/3 10/125 µm single-mode fiber 40 km (24.8 mi)
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1. For maximum performance of Gigabit Optical Datalinks when greater than 40 km (24.8 mi) and operating within the 1550 nm
optical spectrum, it is mandatory that the Single Mode Fiber (SMF) be rated as “non-dispersion-shifted,” “dispersion shifted,”
or “non-zero dispersion shifted.”
AT-PB1001/4 10/125 µm single-mode fiber 70 km (43.4 mi)
1