3Com 3C10200 NBX Installation Guide - Page 109

Connecting Cards and Devices 109 c Enable the check box labeled Fax Machine, then click Apply. Configuring an ATA port for fax operation optimizes the performance for inbound and outbound faxes. If you make a voice call using the ATA device (for example, if you use the telephone portion of the fax machine), the quality of the audio may be affected. If you make a VTL call using the ATA device, the audio may be unusable. If you configure the port for fax operation, expect lower quality voice calls on that port. If you configure the port for voice calls, the performance is not optimized for faxes. Using Power over Ethernet with an ATA The 3C10120B requires the use of a splitter device to accept Power over Ethernet (PoE). The 3C10400B ATA can accept power over the Ethernet cable. It meets the IEEE 802.3af standard for Power over Ethernet. See Table 22 for power connection instructions. The 3C10400B ATA is a Class 3 PoE device. The 3C10400B ATA can also accept power from an AC power adapter plugged into a wall socket. If you supply power to the ATA using an AC power adapter and then also supply power on the Ethernet cable, the ATA uses the Ethernet power source. If you supply power to the ATA over the Ethernet cable and then also connect the AC power adapter, the ATA continues to use the Ethernet cable power source. If you connect both power sources to the ATA and later remove the Ethernet cable, the ATA switches to use the AC power adapter. Table 22 Connecting Power to an NBX Analog Terminal Adapter Power Source AC power adapter NBX ATA Model 3C10400B 3C10120B Connection Details Any NBX ATA can accept power from an AC power adapter. Use the power adapter that comes with your ATA. On all NBX devices, the power connector is labeled with the DC power symbol: