DSLAMs and T1/E1 Multiplexers
ForeFront FF2400 Series Ethernet over T1/FT1 (IP-over-TDM) Bridging Gateway

This device enables Ethernet to be Transported (Bridged) over a T1 line. Like an Ethernet over T1 Media Converter, 10/100BaseT Ethernet is converted to T1 and then back to Ethernet on the other side.

• T1 & Fractional T1 - Supports T1 or Fractional T1/ T1 timeslots can be selected up to 1544 Kbps in steps of N*64 Kbps. Allows for a minimum transmission rate of 64 Kbps and a maximum of 1.544 Mbps.
• 4 Ethernet Ports - . 4x10/100BaseT Ethernet interface in accordance with IEEE802.3.
• Flexible Line Coding & Signaling - User selectable AMI and B8ZS line coding. SF and ESF framing (user selectable) options available. Robbed Bit Signaling option.
• Ethernet - Ethernet frame size up to 1916 bytes (max), Supports Jumbo Frames and accommodates up to 8192 frames with a maximum frame size of 1916 bytes. Prevents any data overflows, or loss of packets in the event of a data burst. Available with MAC address list filtration, learning, and updating functions.
• Clocking - Supports two clock synchronization modes, Internal clock and Network clock (Loop-Timed clock).
• Configuration & Management - Serial RS232 Port for local management. 10/100BaseT for Remote Management over a LAN. 10/100BaseT telnet over a TCP/IP Network (Telnet interface for remote programming and monitoring by using CLI text commands). Supports SNMP V2.
• Indications and Alarm Monitoring - T1 Loss of signal. Presence of incoming signal at 10/100BaseT Ethernet. Loss of Ethernet packets, errored Ethernet packets, over-sized Ethernet packets and under-sized Ethernet packets log. Configuration error alarm. Clock status. DC or 110V AC present. 3.3V DC present.
• Status Monitoring - Status of alarms on T1 Interface. Status of the Ethernet Interfaces. Monitoring data through put speed of the Ethernet Interfaces.
• AC or DC Power - Comes with dual internal -48V DC. External Universal AC Power Adapters available.

The FF2400 Ethernet over T1 (IP-over-TDM) Bridging Gateway enables Ethernet to be transported (bridged) over a T1 line.  Like an Ethernet over T1 Media Converter 10/100BaseT Ethernet is converted to T1 and then back to Ethernet on the other side.

The units support 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 T1 link.

The unit functions as an Ethernet extension device using TDM telecom infrastructure (of leased lines, SDH rings, microwave links presenting T1 interfaces ).  

It simply Bridges two Ethernet LANs over an existing T1-based telecom network.  It accomplishes this by converting the Ethernet data into T1 frame format for transmission over the existing TDM (T1) links and then re-converting the T1 back into Ethernet data the far-end terminal.

Users can select various line coding and signaling options including AMI and B8ZS line coding and Robbed Bit Signaling.  Super-frame (SF) and Extended Super-frame (ESF) is also user selectable) options available.   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 using a local serial RS232 Port or via one of the 10/100BaseT Ethernet ports for either local or remote management over the LAN.  The device supports Telnet for remote programming and monitoring by using CLI text commands) as well as SNMP V2.