
Model Descriptions
Figure 1 illustrates the front panel of the AT-8516F/SC  switch.
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| Port LEDs | System LEDs | |
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 | PORT ACTIVITY L/A LINK / ACTIVITY | D/C FULL DUP HALF DUP/ COL | 
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 | STATUS | |
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| TX | 1 | RX | D/C | TX | 2 | RX | D/C | TX | 3 | RX | D/C | TX | 4 | RX | D/C | TX | 5 | RX | D/C | TX | 6 | RX | D/C | TX | 7 | RX | D/C | TX | 8 | RX | D/C | FAULT | 
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 | L/A | MASTER | 
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 | RPS | 
| TX | 9 | RX | 
 | TX | 10 | RX | 
 | TX | 11 | RX | 
 | TX | 12 | RX | 
 | TX | 13 | RX | 
 | TX | 14 | RX | 
 | TX | 15 | RX | 
 | TX | 16 | RX | 
 | PWR | 
| D/C | D/C | D/C | D/C | D/C | D/C | D/C | D/C | 
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| Module Expansion Slots | ||
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 | Terminal Port | 
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 | RPS INPUT | 
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| AC Power Connector | RPS Connector | 
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Figure 1. AT-8516F/SC  Switch Front and Back Panels
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