Redundancy & High Availability
This article describes TelcoBridges' VoIP Gateway high availability features. The hardware and software are design with the following 2 goals in mind:
- First and foremost, to recover from a system failure to minimize the system down time or instability as much as possible. This is achieve with a fault tolerant and redundancy architecture.
- Secondly, to keep active calls open after a fail-over whenever possible.
TelcoBridges High Availability
TelcoBridges High Availability should be seen as a collection of high availability and redundancy features instead of one single feature. This means that customer can go as little or as far as they want to create a high availability system.
Definitions
Here is a list of terms used in the description of the high availability features:
- Active Calls
- Active/Standby
- Load Sharing
- Master/Slave
- Primary/Secondary
- Resynchronization
- Switchover
- Switchover Period
- Transient Calls
High Availability Features
Hardware High Availability Features
- Dual Power supply
- Networking
- Host redundancy
- Tdm Interfaces (OC3/STM-1 APS)
- Clocking (Multiple clock sources)
TelcoBridges Hardware HA Product Checklist
This checklist provides a quick overview of each Tmedia product and their high availability/redundancy hardware support
| Products | Hardware High Availability Features | |||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TMG800 | TMG3200 Series | TMG7800 | ||||||||||||||||||||||||||||
| Dual Power Supply | {{#switch: Y | Y | YES | y | yes = 
|
N | NO | n | no = 
|
N/A
}} (Optional) |
{{#switch: Y | Y | YES | y | yes =
|
N | NO | n | no =
|
N/A
}} |
{{#switch: Y | Y | YES | y | yes =
|
N | NO | n | no =
|
N/A
}} |
| Control Network Redundancy | {{#switch: | Y | YES | y | yes =
|
N | NO | n | no =
|
N/A
}} |
{{#switch: | Y | YES | y | yes =
|
N | NO | n | no =
|
N/A
}} |
{{#switch: Y | Y | YES | y | yes =
|
N | NO | n | no =
|
N/A
}} |
| Dual Voip Network | {{#switch: Y | Y | YES | y | yes =
|
N | NO | n | no =
|
N/A
}} |
{{#switch: Y | Y | YES | y | yes =
|
N | NO | n | no =
|
N/A
}} |
{{#switch: Y | Y | YES | y | yes =
|
N | NO | n | no =
|
N/A
}} |
| Host Redundancy | {{#switch: N | Y | YES | y | yes =
|
N | NO | n | no =
|
N/A
}} |
{{#switch: N | Y | YES | y | yes =
|
N | NO | n | no =
|
N/A
}} |
{{#switch: Y | Y | YES | y | yes =
|
N | NO | n | no =
|
N/A
}} |
Software Features
- CDR
- Configuration Database
- H.248
- Signaling Stack
- Toolpack Application suites
Installation, Maintenance and Provisioning
This section will show how to install, upgrade and configure a high availability system.
First, we will look at the software installation and provisioning (Host redundancy).