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Depending on the impact and scope of the fault, faults are classified as either emergency faults or ordinary faults.

Emergency faults refer to those that occur suddenly and affect a wide range of services or devices. Emergency faults, such as host breakdown and global service congestion, seriously affect network operations and the quality of service (QoS).

The following faults are emergency faults:

ϒ⁄All or the most majority of unified gateway functions are unavailable.

§A single board or all boards are unavailable.

§The unified gateway is powered off.

ϒ⁄All unified gateway services are globally interrupted for a long time or calls are congested.

§None of the media gateways can register with the network, for example, a media gateway is disconnected immediately after it is registered.

§Calls are congested at all user terminals. For example, users cannot make or receive calls, or cannot hear the dial tone or busy tone after picking up the phone.

§Calls are congested at all office directions. For example, users fail to make or receive calls.

ϒ⁄Some unified gateway services are interrupted for a long time or calls are congested.

§Some media gateways fail to register with the network, or disconnect immediately after they are registered.

§Call congestion occurs in some user terminals. For example, users cannot make or receive calls, or cannot hear the dial tone or busy tone after picking up the phone.

§Call congestion occurs in some office directions. For example, users fail to make or receive calls.

Ordinary faults refer to those faults that are not emergency faults. The policies for locating and rectifying faults and the applicable reference documents are different for emergency and ordinary faults.

Table 1 Policies for locating and rectifying faults

Parent Topic: Overview

 

 

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