3Com 3C10200 NBX Installation Guide - Page 51

Figure 23 Analog Terminal Adapter - Rear View NBX Cards and Devices 51 24 VDC IOIOI POTS LAN PC The ATA is a Class 3 PoE device. It meets the IEEE 802.3af standard for Power over Ethernet. It can also accept power from an AC power adapter plugged into a wall socket. The ATA has an RS232 DB9 connector that allows a technician to access a command line interface for the device. Only qualified 3Com service personnel should use the serial diagnostic port. The Analog Terminal Adapter has these lights and connectors: ■ Power Light - The light below the icon for power indicates that the ATA is receiving power. ■ POTS Status Lights (S1, S2, S3) - The POTS (Plain Old Telephone Service) status lights indicate the status of the Analog Port. S3 is on when the analog device is in use. S2 blinks briefly every 10 seconds when an analog device is connected to the ATA. If no analog telephone is connected, S2 is always off. S1 is reserved for future use. ■ PC Link Light - On indicates that there is an external network device connected to the ATA. ■ LAN Link Light - On indicates that the ATA is connected to the network. ■ 10101 - Serial port for diagnostics. ■ POTS - A connection for an analog telephone or fax machine. ■ PC - A connection for a network device. ■ LAN - A connection to the network.