High Availability Overview

This article will describe the TelcoBridges Tdev High Availability feature. The hardware and software are design with the following 2 goals in mind:

1. 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.
2. 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{{#switch: n

| Y | YES

| y

| yes = Y | N | NO | n | no = N | N/A }}

• Networking {{#switch: n

| Y | YES

| y

| yes = Y | N | NO | n | no = N | N/A }}

• • Control Network Redundancy
  • Dual VoIP Network
  • TMS Network
• Host redundancy{{#switch: n

| Y | YES

| y

| yes = Y | N | NO | n | no = N | N/A }}

• • Hard Disks{{#switch: n

| Y | YES

| y

| yes = Y | N | NO | n | no = N | N/A }}

• Tdm Interfaces (OC3/STM-1 APS){{#switch: y

| Y | YES

| y

| yes = Y | N | NO | n | no = N | N/A }}

• Clocking (Multiple clock sources){{#switch: n

| Y | YES

| y

| yes = Y | N | NO | n | no = N | N/A }}

TelcoBridges Hardware HA Product Checklist

This checklist provides a quick overview of each Tdev models and their high availability support

Products	Hardware High Availability Features
	Dual Power Supply	Control Network Redundancy	Dual Voip Network	Host Redundancy
TMP800	{{#switch: n	Y	YES	y	yes = Y	N	NO	n	no = N	N/A }}	{{#switch: n	Y	YES	y	yes = Y	N	NO	n	no = N	N/A }}	{{#switch: n	Y	YES	y	yes = Y	N	NO	n	no = N	N/A }}	{{#switch: Y	Y	YES	y	yes = Y	N	NO	n	no = N	N/A }}
TMP5900	{{#switch: Y	Y	YES	y	yes = Y	N	NO	n	no = N	N/A }}	{{#switch: Y	Y	YES	y	yes = Y	N	NO	n	no = N	N/A }}	{{#switch: Y	Y	YES	y	yes = Y	N	NO	n	no = N	N/A }}	{{#switch: n	Y	YES	y	yes = Y	N	NO	n	no = N	N/A }}
TMP6400	{{#switch: Y	Y	YES	y	yes = Y	N	NO	n	no = N	N/A }} (with 2 U)	{{#switch: Y	Y	YES	y	yes = Y	N	NO	n	no = N	N/A }}	{{#switch: Y	Y	YES	y	yes = Y	N	NO	n	no = N	N/A }}	{{#switch: Y	Y	YES	y	yes = Y	N	NO	n	no = N	N/A }}
TMP7900	{{#switch: Y	Y	YES	y	yes = Y	N	NO	n	no = N	N/A }}	{{#switch: Y	Y	YES	y	yes = Y	N	NO	n	no = N	N/A }}	{{#switch: Y	Y	YES	y	yes = Y	N	NO	n	no = N	N/A }}	{{#switch: Y	Y	YES	y	yes = Y	N	NO	n	no = N	N/A }}

Software Features

• CDR{{#switch: y

| Y | YES

| y

| yes = Y | N | NO | n | no = N | N/A }}

• Configuration Database{{#switch: y

| Y | YES

| y

| yes = Y | N | NO | n | no = N | N/A }}

• H.248{{#switch: n

| Y | YES

| y

| yes = Y | N | NO | n | no = N | N/A }}

• Signaling Stack{{#switch: n

| Y | YES

| y

| yes = Y | N | NO | n | no = N | N/A }}

• • CAS
  • ISDN
  • SIGTRAN
    • M2PA
    • M2UA
    • M3UA
  • SIP
  • SS7
    • ISUP
    • MTP2
    • MTP3
    • SCCP/TCAP
• Toolpack Application suites {{#switch: y

| Y | YES

| y

| yes = Y | N | NO | n | no = N | N/A }}

• • gateway/user specific application
  • tboamapp
  • Tbtoolpack service
  • toolpack_engine
  • toolpack_sys_manager
  • tbstreamserver
  • web_server

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).

• Installing a host redundancy system

• Upgrading a host redundancy system

• Configuring a host redundancy system