E1 Automatic Protection (Fail-Over) Switching equipment

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E1 Automatic Protection (Failover) Switch

Product Overview – E1 Protection (Failover) Switch - 4 E1 Links (12 E1 Ports)

E1 Protection (Fail Over) 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.
 

 

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:

Valiant's 12 Port E1 (4 E1 Links) Protection / Redundancy (Fail-Over) Switch

Application 1

Automatic switch-over

Automatically restore to main link

  • 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.

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.
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.

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
Line Code HDB3
Frame Structure As per ITU-T G.704 / or Un-Framed E1 (User Selectable)
Bit Rate 2048 Kbps ± 50 ppm
Jitter Tolerance As per ITU-T G.823
Output Jitter < 0.05 UI (in the frequency range of 20 Hz to 100 KHz)
Nominal Line Impedance 120 Ohms Balanced RJ-45
Nominal Pulse Width 244 ns
Pulse Mask As per ITU (CCITT) Rec. G.703
Loss and recovery of frame alignment As per clause 3 of ITU (CCITT) G.732

Loss and recovery of multiframe alignment As per clause 5.2 of ITU (CCITT) G.732


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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