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Description
Comarra offers its Ethernet over DS3 Switch (Ethernet to
DS3 Switch) packaged in a 19-inch rack-mountable chassis.
Comarra Ethernet over DS3 Switch (Ethernet over DS3 Switch) provides
a four 100BaseT Ethernet and 100Base-FX optical ethernet interfaces on
the user side which may be used to transport Ethernet traffic over a
DS3 link. Both ethernet interfaces may be used simultaneously. The
Switch provides a simple and cost effective method to convert and
transport ethernet data over an DS3 link.
Ethernet to DS3
Switch - Data Sheet
Features and Highlights
- Ethernet interface to DS3 45 Mbps converter
- 4x100BaseT full duplex fast ethernet
interface in accordance with IEEE802.3
- 3x + 1x100Base-FX full duplex
optical ethernet
interface
accordance with IEEE802.3
- Framed and un-framed DS3 options
available
- Local and Remote access and
monitoring with either RS232 or 10/100BaseT for remote management
over TCP-IP network
- Power Supply: - 48 V DC or 110 V 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.
Why we are
better:
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Our Ethernet over DS3 equipment offers the
following necessary features that similar equipment from the other
manufacturers do not offer or support...
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 DS3
interface of the equipment to a Framed DS3 network interface,
the network is likely to show an error on the DS3 interface.
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 DS3
converter simply interconnects two LANS over a DS3 link. The Ethernet
Over DS3 converter does not do any routing function. It simply provides
a bridge to inter-connect two LANs over a DS3 link.
Note: The equipment should always be installed and used in pairs
- with each unit to be installed at either end of the DS3 link. |
Applications
Indications and Alarm
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 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 and monitoring by using
CLI text commands
- Easy to use programming using Windows based GUI.
Status Monitoring
Ethernet Interface
|
Interface Types |
100BaseT and 100Base-FX optical |
|
Standards Compliance |
IEEE 802.3-2002
RFC1662
RFC2615
X.86
RMII |
|
Interface Rate |
100BaseT limited to DS3 transmission rate |
|
Protocol |
HDLC/X.86 (LAPS) Encapsulation |
DS3 Interface
|
Bit Rate |
44.736
Mbps |
|
Bit Rate
Tolerance |
± 20ppm |
|
Line Code |
B3ZS |
|
Framing
options |
Meets
ANSI T1.404
M13 (M23)
C-Bit
Un-framed |
|
Pulse
Shape |
Meets
ANSI
T1.102-1993 and
Bellcore GR-499-CORE |
|
Connectors |
BNC,
Co-axial
Un-balanced |
|
Impedance |
75 Ohms |
|
Signal Level to declare Loss
of Signal condition |
<
20mV |
|
Signal Level to clear Loss
of Signal condition |
>
90 mV |
Application Diagram
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 of AC Adapter |
100 - 240 Volt
AC |
| Range of input
AC voltage |
100 V to 240 V
AC |
| System Input
voltage |
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
- 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
Number of Ethernet Interface
|
10/100BaseT (Electrical) |
4 |
|
10/100BaseT Electrical + 100Base FX Optical |
3 Electrical and 1 Optical |
100BaseT Interface (Electrical Ethernet)
| Interface Types |
100BaseT |
| Standards Compliance |
IEEE 802.3-2002,
RFC1662,
RFC2615,
X.86,
RMII |
| Interface Rate |
100BaseT limited to DS3
transmission rate |
| Protocol |
HDLC/X.86 (LAPS)
Encapsulation |
| Connectors |
RJ-45 (100 BaseT Electrical) |
100BaseT-FX Interface (Optical Ethernet)
| Interface Types |
100BaseT-FX |
| Standards Compliance |
IEEE 802.3-2002,
RFC1662,
RFC2615,
X.86,
RMII |
| Interface Rate |
100BaseT-FX optical limited
to DS3 transmission rate |
| Protocol |
HDLC/X.86 (LAPS)
Encapsulation |
| Connectors |
SC |
Clock
| Internal |
System Internal
Clock |
| Loop-Timed |
Timed from DS3
Interface |
Management and
Control
- Serial Management Port - RS232 Interface
- 10/100 BaseT for Remote Management over a LAN
- 10/100 BaseT 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 and 100Base-TX Activity, Full/half duplex |
|
Management |
Internal web server, SNMP (read only), Serial login, Telnet login |
|
EMI compliance |
- Radiated and conducted emissions - complies with
Class B limits of EN55022:1998
- Direct and 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
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Technical specifications are subject to
change without notice.
All brand names and trademarks are the property of their respective owners.
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