Chapter 2: Installation
Planning the Installation
Table 10 contains the cabling specifications for the twisted pair ports.
Table 10. Twisted Pair Cabling and Distances
| | | Maximum |
Model | Speed | Cable Type | Operating |
| | | Distance |
| | | |
| | | |
AT-8524M | 10 Mbps | Category 3 or better | 100 m (328 ft) |
AT-8524POE | | 100-ohm shielded or | |
AT-8550GB | | unshielded twisted pair | |
AT-8550SP | | cable | |
| | | |
| 100 Mbps | Category 5 or Category | 100 m (328 ft) |
| | 5E (Enhanced) | |
| | 100-ohm shielded or | |
| | unshielded twisted pair | |
| | cable | |
| | | |
AT-8550GB | 1000 Mbps | Category 5 and | 100 m (328 ft) |
AT-8550SP | | Category 5E | |
(Ports 49R | | (Enhanced) 100-ohm | |
and 50R) | | shielded or unshielded | |
| | twisted pair cable | |
| | | |
Note
The twisted pair ports on the switch feature auto-MDI/MDI-X. They configured themselves automatically as MDI or MDI-X when connected to an end node. This allows you to use a straight-through twisted pair cable when connecting any type of network device to a port on the switch.
The auto-MDI/MDI-X feature is disabled if you disable Auto- Negotiation on a port and set a port’s speed and duplex mode manually using the AT-S62 management software. A port where Auto-Negotiation has been disabled defaults to MDI-X. Disabling Auto-Negotiation may require that you manually configure a port’s MDI/MDI-X setting or use a crossover cable.
Note
The 10/100/1000Base-T ports, Ports 49R and 50R, on the AT-8550GB and AT-8550SP switches can operate at 1000 Mbps only when set to Auto-Negotiation, which is the default setting. You cannot manually set these ports to 1000 Mbps.
