Supports IEEE 802.3af Power over Ethernet (PoE)
Can be powered via PoE or optional 48VDC adapter
Can be configured for either local or remote (off-site) operation
Uses a G.711 codec in its "local" mode of operation and a G.726 codec in its "remote" mode
Can use DHCP to obtain an Ip address or statically programmed
Remote ip phones automatically uses DHCP to obtain an IP address and default gateway
Complies with IEEE 802.1q and 802.1p (VLAN) Layer 2 switching and prioritization
Complies with differentiated services (DiffServ, RFC 2475) Layer 3 Quality of Service (QoS)
Remote Ip Phones 
ESI now offers the ability to connect telephone stations in any location anywhere in the world. Imagine sitting in a branch office in St. Louis or Seattle, using a phone that is an actual extension from your home office in Dallas.
For businesses that need more than just an extension outside of headquarters, our technology can connect the ESI phone systems (and, with the appropriate hardware, even non-ESI phone systems) at up to 100 branch offices. These multiple branch offices, as well as remote users, instantly communicate together, effectively creating one large system. As a result, each of these individual locations offers virtually all of the same features as the extensions sitting in the main office, without distance limitations. Additionally, each of the phone systems can function independently, taking full advantage of ESI's unique, robust features.
The future is now. Imagine the possibilities - and then let your imagination become reality.
