What TelcoBridges has in common with aircrafts, communications satellites, global positioning systems and various military systems?

What TelcoBridges has in common with aircrafts, communications satellites, global positioning systems and various military systems?

Aircrafts, communications satellites, global positioning systems, and military systems, are critical systems that need to be as robust and reliable as possible. In fact, these systems are often referred to as examples of “zero downtime” systems. TelcoBridges' high availability products bring a similar “zero downtime” approach to the telecommunications industry.

High availability product designs seek to maximize the up time of a product, system, or network thereby minimizing any unscheduled downtime.  Unscheduled downtime can arise from physical events, such as hardware or software failures, power outages, temperature anomalies, logical or physical severed network connections, or security breaches. 

Availability is typically expressed as a percentage of up time in a given year. The following table illustrates the concept of availability and correlates it with the allowable system downtime for a year, month or week.


Availability %

Downtime per year

Downtime per month*

Downtime per week

90% ("one nine")

36.5 days

72 hours

16.8 hours

99% ("two nines")

3.65 days

7.20 hours

1.68 hours

99.9% ("three nines")

8.76 hours

43.8 minutes

10.1 minutes

99.99% ("four nines")

52.56 minutes

4.32 minutes

1.01 minutes

99.999% ("five nines")

5.26 minutes

25.9 seconds

6.05 seconds

99.9999% ("six nines")

31.5 seconds

2.59 seconds

0.605 seconds

99.99999% ("seven nines")

3.15 seconds

0.259 seconds

0.0605 seconds


At TelcoBridges our gateways already achieve 99.999% ("five nines") availability BEFORE considering any redundancy schemes. Once redundancy is factored in our gateways surpass "five nines" reliability, bringing our systems closer into the realm of zero-downtime systems.

Adding redundancy to a system is more than just adding more hardware. More hardware means more potential points of failure. Redundancy hardware needs to be properly integrated into a product's functionality, as well as the system. Most analysts and technology experts agree that “highly-available” systems should adhere to a simple architecture, with high quality, multi-purpose physical systems that provide failover capabilities through integrated hardware redundancy.  

"Systems like our gateways that exhibit truly continuous availability are rare," said Eric Morin, Director of Engineering at TelcoBridges.  Adding, "Our gateways are designed to minimize or eliminate any single point of failure, and allow for simple, streamlined hardware and software updates, and replacements." 


TelcoBridges' Redundancy Schemes

TelcoBridges’ 1+1, and N+1 schemes answer the need for maximum reliability through a redundant solution that EXCEEDS five-nines reliability. 

  • In a 1+1 solution, each active unit is backed by a secondary standby unit,
  • In an N+1 solution, a group of active units are backed by a single standby unit.

Both configurations can be used to create a redundant system from 1 to 1024 T1/E1s, 1 to 48 DS3s, or 1 to 16 OC3/STM1s.  By doing so, customers are able to maximize availability, through a fault tolerant architecture that enables them to keep calls open by use of a fail-over.      



TelcoBridges provides High Availability through the use of a collection of redundancy features such as: 


Hardware Features:  

From a Hardware perspective, all TelcoBridges products provide the following features to ensure High Availability:  

  • Dual Power supply
  • Dual Control Network
  • Dual VoIP Network
  • Dual TMS Network
  • Host redundancy
  • 1+1 facility protection
  • STM1 Automated Protection Switching (APS)
  • Dual BITS ports for clocking or signaling
  • Multiple clocking sources


What does reliability do for me?

With the TelcoBridges staunch commitment to reliability and quality you can be assured that your system will always be available for your business needs.


To find out more, contact us today.


Meet TelcoBridges...

Photo of Eric Morin telcoBridges Eric Morin is TelcoBridges Director of Engineering, and hardware design veteren.