Automatic Protection Swithing
T1 Failover Switch

VCL Products > Automatic Protection Switch > T1 Failover Switch
T1 Failover Switch
T1 Failover Switch
T1 Failover Switch
T1 Failover Switch
T1 Failover Switch
T1 Failover Switch

T1 Failover (T1 Automatic Protection) Switch

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Valiant's T1 Fail-Over (T1 Protection) Switch (12 T1 Ports - 4 Links) allows the user to connect a single T1 line from the telephone company to an "active", as well as to a "standby" T1 terminal, such as data server / router etc. at the customer premises.

How it works ? - In the event of the failure of the data server / router connected to the "A / active" port of the T1 Protection (Fail-Over) Switch, it shall automatically switch and connect the T1 line from the telephone company to the data server / router on the "B / standby" port. 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.

E1 Protection Fail-Over Switch 12 T1 Ports 4 Links

Features & Highlights

  • Allows the user to connect a T1 line from the Telephone Company and to switch it automatically between an "active" and a "standby" T1 terminal at the customer premises. The user programmable switching criterion may be Loss Of T1 Signal, AIS and Loss Of T1 Frame.
  • Can accomodate upto four T1 lines - may be used switch between "active" and "standby" T1 terminals connected to upto four (or fewer) T1 lines.
  • Independent switching for each of the four T1 lines.
  • User programmable switching criterion - independent for each T1 line.
  • 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 T1 line(s) between the "active" and "standby" T1 terminals, remotely, if required.
  • 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 T1 lines from the telephone company.
  • Automatically switches the T1 line from the Telephone Company between the "active" and "standby" T1 equipment at the customer premises, according to the customer-programmed 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 T1 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 T1 Fail-Over Switch should be used when the customer is using a T1 line to connect to and install "active" T1 equipment and "standby" T1 equipment (such as a ROUTER or a PBX) at the customers premises.
  • The T1 Failover Switch shall automatically switch the T1 line from the telephone company between the ACTIVE T1 data server / router and the STANDBY T1 data server / router. Should the ACTIVE T1 data server / router fail or be removed from service, the T1 line from the telephone company automatically switches to the STANDBY T1 data server / router without requiring any customer or user intervention.
  • 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.

Network Interface

Number of Interfaces 4 Telco T1 Links (common link/Telco T1s)
4 Active T1 Links (for Equipment-A)
4 Standby T1 Links (for Equipment-B)
Line Rate T1 - 1.544 Mbps
Line Code B8ZS, AMI (User Selectable)
Frame Structure SF, ESF (User Selectable)
Bit Rate 1544 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 100 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 - 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.
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
  • H x D x W : 44 x 260 x 477 mm.
  • Weight : 4.00 kg.

Command Language

  • Command Line Interface (English text commands)

Management Ports (COM Port)

  • Serial Port: 9.6Kbps (Async). ASCII/VT100/HyperTerminal
  • 10BaseT Ethernet: Telnet

Temperature

  • Operating : 0°C to 50°C
  • Humidity : 5% to 95% Non-Condensing

Application #1: Telco T1 Link Connected to Equipment - A


Telco T1 Link Connected to Equipment

User programmable criterion for switching between Active and Standby T1 Links at the customers premises.



Application #3: Equipment - A recovers - Telco T1 automatically switches to Equipment - A


Telco T1 automatically switches to Equipment

Application #2: Equipment - A Fails - Telco T1 automatically switches to Equipment - B


Telco T1 automatically switches to Equipment