Avaya 1110 Fundamentals page 531

ATA USB power limitations
• The Algo 4900 USB ATA can only accept power from a USB source and is classified as
a high power USB device (exceeds the 100mA limit of the IP Phone USB port).
• For Avaya 1120E/1140E/1150E IP Deskphones, you must connect the Algo 4900 USB
ATA to an externally powered USB hub, which is then connected to the IP Phone USB
port. If you connect the Algo 4900 USB ATA directly to the IP Phone USB port, the IP
Phone shuts down service to the USB port
• For Avaya 1165E IP Deskpone, if the IP Phone is local AC powered, you can connect the
ATA directly to the phone. However, if the IP Phone is POE powered, you must connect
the Algo 4900 USB ATA to an externally powered USB hub which is then connected to
the IP Phone USB port.
IP Deskphones Fundamentals
USB audio support
February 2013 531