Mediant 3000 High Availability System - AudioCodes Mediant 3000 User Manual

The device's chassis provides a compact, rugged 19-inch rack mount unit, 2U high (3.5" or
89 mm), designed to meet NEBS level-3 requirements. The device is a four-slot chassis
(four front and rear slots) that houses VoIP communication blades, synchronization and
alarm blades, and rear transition modules (RTM). The front and rear blades interface
through a backplane located in the middle of the chassis. The device's chassis' modular
design allows easy add and replacement of modules. All modules are hot-swappable,
allowing component replacement while the system is fully operational with no disruption to
service. The device contains the following main components:

Up to two VoP communication blades

RTM's (amount and type depend on the implemented VoP blade)

Up to two SA/M3K Synchronization and Alarm blades

Up to two Power Entry modules

Up to two Power Supply module
These components function in either an Active/Standby redundant or load-sharing
configuration to provide full continuous performance coverage and are ideal building blocks
for deploying high-density, high availability, Voice-over-Packet systems.
The device can operate in one of the following modes:

Simplex Mode: This mode provides only one VoP communication blade and one
Synchronization and Alarm blade (SA/M3K). In this mode, the device can also support
an optional, integrated CPU (iCPU) for third-party applications.

High Availability 1+1 (HA) Mode: This mode provides system redundancy. The
device houses two VoP communication blades (one active and one standby), two
RTMs, and two Synchronization and Alarm blades. The device's hardware design
contains redundant modules for every part of the system, including redundant network
connectivity, comprehensive switchover processing and backup data storage and
access, as well as applicable load-sharing schemes. In addition, components are hot-
swappable so that they can be replaced while the system is fully operational with no
disruption to service.
To achieve HA, the software resides on redundant components and performs the
following:
•
Monitors system components to detect any hardware failures
•
Handles switchover procedures to overcome possible failures
For more details on the HA system, see 'Mediant 3000 High Availability System' on
page 18.
1.1

Mediant 3000 High Availability System

The High Availability architecture of the Mediant 3000 provides the following main
functionality:

Redundant Active/Standby configuration

Support for both TP-6310 and TP-8410 blades

One or many global device IP addresses

Private IP address for each blades for maintenance and fallback.

Upgrading software without disrupting current calls (Hitless Software Upgrade)
SIP User's Manual 18
Mediant 3000
Document #: LTRT-89712