3Com V3000 ANALOG, Installation Manual

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108 C
HAPTER
2: I
NSTALLING
S
YSTEM
H
ARDWARE
C
OMPONENTS
4 Connect the AC power adapter to the AC power connector on the ATA.
If you are using a powered Ethernet cable instead of the AC adapter, see
“Using Power over Ethernet with an ATA” next.
5 Plug the AC power adapter into a wall outlet.
6 Use the Auto Discover feature to configure the ATA. For more
information about Auto Discover, see
“Using Auto Discover for Initial
System Configuration” on page 111 .
7 If the ATA is connected to a fax machine, configure the port for fax
usage:
a Open the NBX NetSet utility and click Telephone Configuration > ATA .
b Click the extension to open the Modify page.
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.