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.

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