DSLAMs and T1/E1 Multiplexers
ForeFront FF2500 Series Ethernet over DS3 (IP-over-TDM) Bridging Gateway

This device enables Ethernet to be Transported (Bridged) over a DS3 line. Like an Ethernet over DS3 Media Converter, 10/100BaseT Ethernet is converted to DS3 and then back to Ethernet on the other side.

• Ethernet Over DS3 - Bridges Ethernet over DS3 at 44.736 Mbps. Framed and un-framed DS3 (configurable) options.
• 4 Ethernet Ports - 4 x 100BaseT full duplex fast ethernet interfaces (IEEE802.3). Supports Jumbo Frames up to 8192 frames with a maximum frame size of 1936 bytes. Prevents any data overflows, or loss of packets in the event of a data burst.
• Clocking - Supports two clock synchronization modes, Internal clock and Network clock (Loop-Timed clock).
• Configuration & Management - Local and Remote access and monitoring with either RS232 or 10/100BaseT for remote management over TCP-IP network or via a Windows based GUI.
• Status Monitoring - DS3 Loss of signal, Loss of DS3 frame (in framed DS3 mode), Loss of incoming signal at 100 BaseT Ethernet, Loss of ethernet packets, errored ethernet, packets, over-sized ethernet packets and undersized ethernet packets log. Also includes Configuration Error Alarm, Clock Status, +3 Volts & -48V DC power present and Configuration Error indicators.
• Flexible Power - 48V DC or 110V AC power supply options available with dual -48V DC (1+1) power input optional.

The FF2500 Ethernet over DS3 (IP-over-TDM) Bridging Gateway enables Ethernet to be transported (bridged) over a DS3 line.  Like an Ethernet over T1 Media Converter 10/100BaseT Ethernet is converted to DS3 and then back to Ethernet on the other side.

The unit supports four (4) x Ethernet ports and is packaged in a 1U High, 19-inch rack-mountable chassis.  The converter provides a simple and cost-effective method to convert and transport Ethernet data over a DS3 link.

The unit functions as an Ethernet extension device using TDM telecom infrastructure (of leased lines, SDH rings, microwave links presenting DS3 interfaces ).  

It simply Bridges two Ethernet LANs over an existing DS3-based telecom network.  It accomplishes this by converting the Ethernet data into a TDM frame format for transmission over the existing DS3 links and then re-converting it back into Ethernet data at the far-end.

Clocking modes include Internal clock and Network clock (Loop-Timed clock).  The device supports Jumbo Frames and accommodates up to 8192 frames with a maximum frame size of 1916 bytes. 

Configuration and Management can be performed via a Windows based GUI, using a local serial RS232 Port or via one of the 10/100BaseT Ethernet ports for either local or remote management over IP.