DS3 Failover (DS3 Protection) Switch

Description

DS3 Fail Over (DS3 Protection) Switch - Upto 2 x DS3 Links

Valiant's DS3 Protection (Fail Over) Switch allows the user to connect a single DS3 line from the telephone company to an "active", as well as to a "standby" DS3 terminal, such as data server, router etc. at the customer premises. In the event of a terminal equipment failure at the customer premises, the DS3 Protection (Fail-Over) Switch automatically "switches" the DS3 line from the service provider to the standby (working) DS3 terminal.

DS3 Failover (DS3 Protection) Switch

How it works?

In the event of the failure of the data server / router connected to the "A / active" port of the DS3 Protection (Fail-Over) Switch, the DS3 line from the telephone company shall automatically be "switched" to the data server / router on the "B / standby" port of the DS3 Protection (Fail-Over) Switch. This ensures minimum downtime - which would have otherwise occurred due to equipment failure connected to the "A / active" port. This equipment may be used to enhance the reliability and the efficiency of the customer's data network.

Application Note

The DS3 Fail-Over Switch should be used when the customer wishes to connect redundant (active and standby) DS3 equipment (such as Routers) at the customers premises to a single DS3 service line from the telephone company.

The DS3 Fail-Over Switch will automatically switch the DS3 service line from the telephone company between the ACTIVE DS3 data server / router and the STANDBY DS3 data server / router. Should and whenever the ACTIVE DS3 data server / router fail (or be removed from service), the DS3 line from the telephone company automatically switches to the STANDBY DS3 data server / router without requiring any customer or user intervention.

The DS3 Fail-Over Switch may also be accessed remotely by the user to allow forced / manual switching between the two DS3 terminals through user executable software commands using Telnet..

Features and Highlights

  • Allows the user to connect a DS3 line from the Telephone Company and to switch it automatically between an active and a standby DS3 terminal at the customer premises
  • LOS (Loss of DS3 Signal) is the switching criterion between "Active" and "Standby" DS3 Ports
  • Fail-Safe switching to Main (Port A) link in to event of equipment or power failure
  • Available in a single DS3 line and a two DS3 line version
  • Independent switching for each DS3 line (in the 2, DS3 line version)
  • 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 switch the DS3 line between the "active" and "standby" DS3 terminals, remotely, if required
  • Dual AC (1+1 AC) or Dual - 48V DC (1+1 DC) power input.
  • Allows the users to install and maintain active / standby / duplicate customer premises data networks / data servers, without bearing the recurring $$ expense of leasing additional expensive DS3 lines from the telephone company
  • Automatically switches the DS3 link from the Telephone Company between the "active" and "standby" DS3 equipment at the customer premises, according to the customer-defined criterion
  • Improves equipment and data security.
  • Allows the user to co-locate the "backup / standby" equipment in a different room / building and prevent any data loss arising out of conditions of natural calamity such as fire, flooding etc.
  • Increases the reliability of the customer's data / IT networks without having to bear the recurring and additional cost of leasing additional DS3 lines from the telephone company. The equipment may be used to create secondary / backup systems at the customer premises to provide virtually uninterrupted service.

DS3 Switching Parameter

Loss of DS3 Signal (LOS) The Loss of Signal condition in a DS3 may occur due to:
  • The failure of the DS3 Port of the customer premises equipment.
  • Or due to loss of power to the customer premises equipment.
  • Or due to the disconnection of the DS3 cable between the protection Switch and the DS3 Port of the customer premises equipment.
DS3 Switching Time
  • Change over time from Main Link to the Standby Link is user configurable from 10ms to 3000ms
  • Recovery Switching time from Standby Link to Main Link is also user configurable from 10ms to 9999ms.

DS3 (T3) Interfaces

Number of DS3 Interfaces – Telco 1 (in one DS3 line version)
2 (in two DS3 line version)
Number of DS3 Interfaces – Equipment 2 (in one DS3 line version)
4 (in two DS3 line version)
Bit rate 44.736 Mbps
Line code B3ZS
Framing Transparent (M-13 and C-Bit supported)
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 > 90mV

AC Power Supply Specifications

Output voltage of AC Adapter 100 - 240V 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 with DC input polarity protection.
Power Supply Rating - Maximum full load output current 2.5 A at 7.5 V DC/9.0 V DC
Power consumption 14 watts
Input voltage reversal protection Provided in the Card
Efficiency at full load >86%
Feed connectors Dual Feed - 2 AC Inputs

DC Power Supply Specifications

Power supply -48V DC (-40V DC to -60V DC)
Input voltage reversal protection Provided in the Card
Power supply 1+1 Protected Inputs
Power consumption 14 watts
Feed connectors Dual Feed - 2 DC Inputs

Command Language

  • Command Line Interface (English text commands)

System Management and Access

  • Windows XP and Windows 7 compatible GUI
  • Telnet - CLI (Command Line Interface)
  • SNMP V2 (MIB File provided with the equipment)

Monitoring and Control Port

  • Serial Management Port (RS232) – COM Port
  • USB Serial Interface – COM Port
  • 10/100 BaseT for remote management over a LAN
  • 10/100 BaseT Telnet over a TCP-IP network

Ethernet Management Port (Telnet and SNMP) Specifications:

Network Interface RJ-45 Ethernet 10BaseT or 100BaseT-TX (auto sensing), MDI-X.
Compatibility Ethernet Version 2.0 IEEE802.3
Protocols Supported ARP, UDP/IP, TCP/IP, Telnet, ICMP, SNMP
Management SNMP (read only), 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

Clock

  • Synchronized to the network DS3 clock.

Chassis

  • 1U High (44 mm.)
  • 19-inch rack-mounting shelf

Compliance/Regulatory

  • Meets CE emission requirements
  • Complies with FCC Part 68 and EMC FCC Part 15 Class 2
  • Operation ETS 300 019 Class 3.2
  • Storage ETS 300 019 Class 1.2
  • Transportation ETS 300 019 Class 2.3

Application Diagrams

Applicaton # 1

Telco DS3 Line Connected to Equipment - A

DS3 Failover Switch

Upon failure of Equipment - A, the DS3 Telco line automatically switches to standby Equipment - B.

Applicaton # 2

Equipment - A Fails - Telco DS3 automatically switches to Equipment - B

DS3 Failover Switch

Applicaton # 3

Equipment - A recovers - Telco DS3 automatically switches to Equipment - A

DS3 Failover Switch