Enables the copper LAN port on E3Switch converters to accept gigabit 1000Base-T Ethernet in addition to 100Base-Tx. This option is usually unnecessary and adds slightly to power consumed, but will reduce latency of incoming packet processing which can reduce VoIP latency. Not necessary if purchasing SFP-GbE upgrade. Availability: Usually ships the next business day GbEup$100.00 Copyright (c) 2011, E3Switch LLC, all rights reserved.