Frequently Asked Questions (FAQ)

Q1. What is the maximum Ethernet frame size in bytes, that this product will support over a E3 link?
A1. The maximum Ethernet frame size in bytes for the Ethernet over E3 is 2016 bytes.

Our Ethernet over E3 solution supports Jumbo Frames: Our equipment is equipped with a Committed Information Rate controller (CIR) which manages any data overflows through its 100MHz SDRAM controller which interfaces to a 32-bit wide 128 Mbit SDRAM. The SDRAM is used to buffer the data from the Ethernet and WAN ports for transport. It can accommodate up to 8192 frames with a maximum frame size of 2016 bytes to prevent any data overflows, or loss of packates in the event of a data burst.

Q2. Can this product utilize an unframed E3?
A2  The product provides both unframed E3 and framed E3, which is user selectable.

• We offer the option of Framed E3 as well as Un-Framed E3 option. The framing option is user programmable and use may select the E3 interfaces as Framed E3 or Un-Framed E3.
  
  Note: Enabling the Framing option becomes essential when you inter-connect and use the equipment over an Sonet/SDH network. If you connect an Un-Framed E3 interface of the equipment to a Framed E3 network interface, the network is likely to show an error on the E3 interface.

• Our equipment allows the user to connect to, configure and manage the equipment remotely over a TCP-IP network. Most of   the equipment being offered by the competition does not offer this feature.

• Our equipment supports efficient handling of data, even during data bursts. Our product design provides a very large buffer data storage capacity to allow for and handle any data bursts very efficiently.

• Supports Jumbo Frames: Our equipment is equipped with a Committed Information Rate controller (CIR) which manages any data overflows through its 100MHz SDRAM controller which interfaces to a 32-bit wide 128 Mbit SDRAM. The SDRAM is used to buffer the data from the Ethernet and WAN ports for transport. It can accommodate up to 8192 frames with a maximum frame size of 2016 bytes to prevent any data overflows, or loss of packets in the event of a data burst.
  
  Flow control is a part of basic ethernet communication protocol and the TCP-IP flow control protocol ensures that an optimum flow control is maintained at all times.
  
  Note # 1: It is essential that the two routers / servers be operating in the same IP domain (subnet), since the Ethernet Over E3 converter simply interconnects two LANS over a E3 link. The Ethernet Over E3 converter does not do any routing function. It simply provides a bridge to inter-connect two LANs over a E3 link.
  
  Note: The equipment should always be installed and used in pairs - with each unit to be installed at either end of the E3 link.

• 100 BaseT Ethernet to E3 Conversion (100BaseT over an E3 interface)
• Ethernet over DS3 converter - Remote LAN application
• Ethernet over E3 converter - Remote LAN over wireless E3 application

Features and Highlights

• G.703 E3 34 Mbps to Ethernet interface converter
• 100BaseT full duplex fast Ethernet in accordance with IEEE802.34, RJ-45.
• 100 Mbit/s full duplex – Auto-negotiation
• Provides framed and un-framed E3 options
• Stratum 3 Clock
• Local &Remote access and monitoring with either RS232 or 10/100BaseT for remote management over TCP-IP network
• Power Supply: -48V DC or AC power supply options available

Equipment Maintenance and Management

• Serial Management Port (RS232) – COM Port
• TCP/IP - 10/100 BaseT for remote management over a LAN / TCP/IP network
• SNMP V2 (MIB File provided with the equipment)
• Telnet - CLI (Command Line Interface)
• Graphical User Interface (GUI)
• Network Management System (to monitor multiple units from a single central location).

Indications and Alarm Monitoring

• E3 Loss of Signal
• Loss of incoming signal at 100 BaseT Ethernet
• Configuration Error Alarm
• Clock Status
• +3 Volts Power Supply
• -48V DC present

• Configuration Error

Application Diagrams

Application 1: Remote LAN Connections

Application 2: Remote LAN Connections over Wireless E3

10/100BaseT Interface

E3 Interface