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E1 Automatic Protection (Failover) Switch
Product Overview – E1
Protection (Failover) Switch - 4 E1 Links (12 E1 Ports)
 Valiant's 12 Port E1 (4 E1 Links) Protection / Redundancy (Failover)
Switch allows the user to connect upto four E1 lines from the telephone company to
"active", as well as to "standby" E1 terminal(s), such as data servers
/ routers etc. at the customer premises.
In the event of the failure of the data server(s) /
equipment connected to the "A / active" ports, the E1 Protection (Fail-Over)
Switch shall automatically switch and connect the E1 line(s) from the telephone company to
the data server(s) / router equipment connected to "B / standby" ports. This
ensures minimum downtime -that would have otherwise occurred due to equipment failure.
Enhances the efficiency of that network.
Features:
Allows the users to connect upto 4 E1 lines from the
Telephone Company to 4 active and 4 standby E1 terminals
User configurable. May be used for a single E1 link and
scaled upto 4 E1 links though user configuration
Independent, user configurable switching parameters for each
E1 link
Built-in real-time clock / real-time logging maintains a
history of all events
Remotely accessible over a TCP-IP networks. Allows the user
to access and carry out maintenance, or and E1 switch the links remotely, if required.
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Benefits:
Allows the users to create and maintain
active/standby/duplicate customer premises routers, data networks/data servers, without
requiring to bear the recurring $$ expense of leasing additional expensive E1s lines from
the telephone company
Automatically switches the E1 link(s) from the Telephone
Company between the "active" and "standby" E1 equipment at the
customer premises, according to the customer-defined criterion
Improves security. Allows the user to co-locate the
"backup"/" standby" equipment in a different room/building and prevent
data loss
User programmable switching criterion independent for each
E1 link
Increases the reliability of the customer data/IT networks
without the recurring additional cost of leasing additional E1 lines from the telephone
company. The equipment may be used to create secondary/backup systems at the customer
premises to provide virtually uninterrupted service.
Application Note: The E1/T1 Fail-Over
Switch should be used when the customer is using a single E1/T1 link to provide protection
equipment to the customers premises by using one E1/T1 ACTIVE and one E1/T1 STANDBY
equipment (such as a ROUTER or a PBX). The E1/T1 Failover Switch will automatically switch
the E1/T1 that is being received from the telephone company between the ACTIVE E1/T1
equipment and the STANDBY E1/T1 equipment. Should the ACTIVE E1/T1 equipment go bad or be
removed from service, the E1/T1 link from the telephone company automatically gets
switched to the STANDBY E1/T1 equipment without any customer or user intervention.
Application Note: 8/16
E1/T1 Links (24/48 E1/T1 Ports), 1+1 Automatic Protection Switching Equipment: This
equipment is to be used when the customer wants to use two different E1/T1 links of the
network to establish a 1+1 redundant path to ensure continued E1/T1 service bewteen two
points even if one of the network E1/T1 link fails. Example - the customer may want to use
E1/T1 Optical Fiber and an E1/T1 Radio link and to provide an ACTIVE and a STANDBY link
between a BSC and a BTS so that when the E1/T1 Optical Fiber (ACTIVE) link goes down the
STANBY / REDUNDANT E1/T1 Radio link automatically gets connected to provide
continued connectivity and service between the BSC and the BTS.
Applications:
- User programmable criterion for switching between
Active and Standby E1 Links at the customers premises:
| Loss Of E1 Signal (LOS) |
The Loss of Signal condition in a
E1 may occur due to: a) The failure of the E1 Port of
the customer premises equipment.
b) Or due to loss of power to the customer premises
equipment.
c) Or due to the disconnection of the E1 cable between the
protection Switch and the E1 Port of the customer premises equipment.
The cause of LOF is framing error.
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| Loss Of Frame (LOF) |
This Alarm is also known as Blue
Alarm. This Alarm indicates unframed all ones being detected in the incoming signal on the
receiver of E1 Protection Switch. |
| Alarm Indication Signal
(AIS) |
This Alarm indicated that E1 link
has occured.
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| Remote Alarm (RA) |
When Framed: Alternating eight
ones/eight zeros have been detected in the Datalink. A Yellow Alarm is typically
transmitted to indicate a failure on the receive side of the Failed end.
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| CRC ERROR |
This parameter is the number of
CRC-6 errors (Cyclic Redundancy Check Errors) that occurred during the test period. CRC-6 errors are only counted while the Telco E1 framing is selected
as (Extended Superframe). The CRC-6 can be monitored either on In-Service or
Out-of-Service E1 Spans. Since the expected value of the CRC pattern can be anticipated,
the received data can be compared to the expected results. Whenever the expected value
does not equal the actual value a CRC error event is counted. |
Technical Specifications
Network Interface
| Number of Interfaces |
4 Telco E1 Links (common
link/Telco E1s) 4 Active E1 Links (for Equipment-A)
4 Standby E1 Links (for Equipment-B) |
| Line Rate |
E1 - 2.048 Mbps
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| Line Code |
HDB3
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| Frame Structure |
As per ITU-T G.704 / or Un-Framed
E1 (User Selectable)
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| Bit Rate |
2048 Kbps ± 50 ppm
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| Jitter Tolerance |
As per ITU-T G.823
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| Output Jitter |
< 0.05 UI (in the frequency
range of 20 Hz to 100 KHz)
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| Nominal Line Impedance |
120 Ohms Balanced RJ-45
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| Nominal Pulse Width |
244 ns
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| Pulse Mask |
As per ITU (CCITT) Rec. G.703
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| Loss and recovery of frame
alignment |
As per clause 3 of ITU (CCITT)
G.732
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| Loss and recovery of multiframe
alignment |
As per clause 5.2 of ITU (CCITT)
G.732
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AC Power Supply Specifications
| Output voltage of AC
Adapter |
100 - 240 Volt AC |
| Range of input AC
voltage |
100 V to 240 V AC,
50Hz / 60Hz |
| 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% |
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 |
Mechanical Specifications
| Rack mounting |
Standard 19-Inch. DIN
Rack |
| Height |
44.00 mm |
| Depth |
260.00 mm. |
| Width |
477.00 mm. |
| Weight |
4.00 kg. |
Management Ports (COM Port)
Serial Port: 9.6Kbps (Async).
ASCII/VT100/HyperTerminal
10BaseT Ethernet: Telnet
Command Language
Command Line Interface (English text commands)
Temperature
| Operating |
00C to 500C |
| Humidity |
5% to 95% Non-Condensing |
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