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Description

Comarra offers its Ethernet to E3 Switch (Ethernet over E3 Switch) packaged in a 19-inch rack mountable chassis.

Comarra Ethernet to E3 Switch (Ethernet over E3 Switch) provides a 100BaseT data interface on the user side which may be used to transport Ethernet traffic over a E3 link. The converter provides a simple and cost effective method to convert and transport 100BaseT ethernet data over a E3 link.

Ethernet to E3 Switch - Data Sheet

Comarra offers its Ethernet to E3 Switch (Ethernet over E3 Switch) packaged in a 19-inch 1U (44mm) high rack-mountable chassis.

Comarra Ethernet to E3 Switch (Ethernet over E3 Switch) provide a 100BaseT data interface which may be used to transport Ethernet traffic over an E3 link. The converter provides a simple and cost effective method to convert and transport 100BaseT ethernet data to an E3 stream. The converter may be accessed by the user for configuration and monitoring through a Windows based GUI that is shipped with the system. It may be also accessed remotely over a TCP/IP network.

Why we are better:

Our Ethernet over E3 equipment offers the following necessary features that similar equipment from the other manufacturers do not offer or support.

  • 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 Switch simply interconnects two LANS over a E3 link. The Ethernet over E3 Switch 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.

Features & 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 Autonegotiation
  • Provides framed and un-framed E3 option
  • 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
  • Ethernet frame size: 2016 bytes (max)
  • Supports Jumbo Frames
  • Accommodates up to 8192 frames with a maximum frame size of 2016 bytes
  • Prevents any data overflows, or loss of packets in the event of a data burst.

Applications

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

Indications and Alarm Monitoring

  • E3 Loss of Signal
  • Loss of E3 frame (in framed E3 mode)
  • Loss of incoming signal at 100 BaseT Ethernet
  • Loss of ethernet packets, errored ethernet packets, over-sized  ethernet packets and under-sized ethernet packets log.
  • Configuration Error Alarm
  • Clock Status
  • +3 Volts Power Supply
  • -48V DC present
  • Configuration Error

Programmable Features

  • Telnet interface for remote programming by using CLI text commands.
  • Easy to use programming using Windows based GUI.

Status Monitoring

  • Status of alarms on E3 interface
  • Status of alarms on 100BaseT interface.

Ethernet Interface

Interface Types 100BaseT
Standards Compliance IEEE 802.3-2002
RFC1662
RFC2615
X.86
RMII
Interface Rate 100BaseT limited to E3 transmission rate
Protocol User Programmable HDLC And LAPS mapping

E3 Interface

Bit Rate 34.368 Mbps
Bit Rate Tolerance +/- 20ppm
Line Code HDB3
Frame Structure As per G.751
Interfaces As per G.703
Connectors BNC, Co-axial
Un-balanced
Impedance 75 Ohms

Application Diagrams

Technical Specifications

DC Adapter Power Supply Specifications (DC Option)

Power Supply -48V DC (-40V DC to -60V DC)
Input DC voltage -48V DC ( nominal)
Range of input -40V to -60V DC
Output voltages +3.3V
Full Load Output Current 2A at +3.3V
Input Voltage Reversal Protection Provided in the Card
Over Current Protection  2A for +3.3V
Short Circuit Protection Current limit - 3A. Recovers on removal of short
Under Voltage < 3.17V
Over Voltage 3.5V
Efficiency at full load >90%
Ripple at full load <5mVrms
Spike at full load <50mV

AC Adapter Power Supply Specifications (AC Option)

Input AC voltage 100 - 240 Volt AC
Range of Input Voltage 100 V To 240 V AC
Output voltages  7.5 V DC to 9.0 V DC DC input polarity protection.
Maximum Full Load Output Current 2.5 A at 7.5 V DC / 9.0 V DC
Input Voltage Reversal Protection Provided in the Card
Efficiency at full load >86%

Chassis

1U High (42 mm)
19-inch rack-mounting shelf.

Power Supply

Power Supply: -48V DC (-40V DC to -60V DC) (Optional)*
Power Supply:  AC Input (Optional)*
* Please specify the Power Supply Option (AC or DC) which is required before placing the order.
Please see ordering information in this data sheet for details.

Power Consumption

Power Consumption: 9 Watts

100BaseT Interface

Number of Interfaces One
Interface Types 100BaseT
Standards Compliance IEEE 802.3-2002
RFC1662
RFC2615
X.86
RMII
Interface Rate 100BaseT limited to E3 transmission rate
Protocol User Programmable HDLC And LAPS mapping
Connectors RJ45 (100BaseT Electrical)

E3 Interface

Number of E3 Interfaces 1
Bit Rate 34.368 Mbps
Bit Rate Tolerance +/- 20ppm
Line Code HDB3
Frame Structure As per G.751
Interfaces As per G.703
Connectors BNC, Co-axial Un-balanced
Impedance 75 Ohms
Permissible Attenuation 12dB @ 17184 KHz
Signal Level to declare Loss of Signal condition -35dB (maximum)
Signal Level to clear Loss of Signal condition -15dB (minimum)

Clock

Clock
Internal
AT&T TR62411, Telcordia GR-1244-CORE, Stratum 3, Stratum 4, Enhanced and Stratum 4, ETSI ETS 300 011, ITU-T G.813 Option 1
Loop-Timed Timed from E3 Interface.
External 75 Ohms - 1.544 MHz (TTL levels)

Management and Control

  • Serial Management Port - RS232 interface
  • 10/100BaseT for Remote Management over a LAN.
  • 10/100BaseT Telnet over a TCP-IP Network.

Command Language

Command Line Interface (english text commands)
Windows based GUI (optional).

NMS (with Telnet) XPort Specifications

Network Interface RJ-45 Ethernet 10BaseT or 100BaseT-TX (auto sensing)
Compatibility Ethernet Version 2.0 IEEE802.3
Protocols Supported ARP, UDP/IP, TCP/IP, Telnet, ICMP, SNMP, DHCP, BOOTP, TFTP, Auto IP, SMTP and HTTP
LEDs 10Base-T & 100Base-TX Activity, Full/half duplex.
Management  Internal web server, SNMP (read only), Serial login, Telnet login
EMI Compliance
  • Radiated & conducted emissions - complies with Class B limits of EN55022:1998
  • Direct & Indirect ESD - complies with EN55024:1998
  • RF Electromagnetic Field Immunity - complies with En55024:1998
  • Electrical Fast Transient/Burst Immunity - complies with EN55024:1998
  • Power Frequency Magnetic Field Immunity - complies with EN55024:1998
  • RF Common Mode Conducted Susceptibility - complies with EN55024:1998

Others Links:

  Multiplexers
  STM SDH Multiplexers
  E1 VoIP-GSM Gateways
  VoIP SS7 and C7 Solution
  Echo Cancellers and VQE Solutions
  GSM Gateways / GSM Channel Banks
  E1 and T1 over Ethernet (TDM over IP)
  Digital Access Cross Connect Switch (DACS)
  E1, T1, E3, DS3, Ethernet Converter (IP over TDM)

Technical specifications are subject to change without notice.
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