This responsibility of the QA function may raise concern for the IS auditor if the updates are not consistent with the organization's policies or if there is a lack of adequate testing of the new methodology. This may result in poor system performance, system vulnerabilities, or other potential risks. Therefore, the IS auditor may need to review the updated methodology and ensure that it aligns with the organization's policies and procedures.

Section: Protection of Information Assets

Section: Protection of Information Assets
Explanation/Reference:
Override feature of PBS provides for the possibility to break into a busy line to inform another user an
important message.
For CISA exam you should know below mentioned PBS features and Risks
System Features
Description
Risk
Automatic Call distribution
Allows a PBX to be configured so that incoming calls are distributed to the next available agent or placed
on-hold until one become available
Tapping and control of traffic
Call forwarding
Allow specifying an alternate number to which calls will be forwarded based on certain condition
User tracking
Account codes
Used to:
Track calls made by certain people or for certain projects for appropriate billing
Dial-In system access (user dials from outside and gain access to normal feature of the PBX)
Changing the user class of service so a user can access a different set of features (i.e. the override
feature)
Fraud, user tracking, non authorized features
Access Codes
Key for access to specific feature from the part of users with simple instruments, i.e. traditional analog
phones.
Non-authorized features
Silent Monitoring
Silently monitors other calls
Eavesdropping
Conferencing
Allows for conversation among several users
Eavesdropping, by adding unwanted/unknown parties to a conference
override(intrude)
Provides for the possibility to break into a busy line to inform another user an important message
Eavesdropping
Auto-answer
Allows an instrument to automatically go when called usually gives an auditor or visible warning which can
easily turned off
Gaining information not normally available, for various purpose
Tenanting
Limits system user access to only those users who belong to the same tenant group - useful when one
company leases out part of its building to other companies and tenants share an attendant, trunk lines,etc
Illegal usage, fraud, eavesdropping
Voice mail
Stores messages centrally and - by using a password - allows for retrieval from inside or outside lines.
Disclosure or destruction of all messages of a user when that user's password in known or discovered by
an intruder, disabling of the voice mail system and even the entire switch by lengthy messages or
embedded codes, illegal access to external lines.
Privacy release
Supports shared extensions among several devices, ensuring that only one device at a time can use an
extension. Privacy release disables the security by allowing devices to connect to an extension already in
use.
Eavesdropping
No busy extension
Allows calls to an in-use extension to be added to a conference when that extension is on conference and
already off-hook
Eavesdropping a conference in progress
Diagnostics
Allows for bypassing normal call restriction procedures. This kind of diagnostic is sometimes available from
any connected device. It is a separate feature, in addition to the normal maintenance terminal or attendant
diagnostics
Fraud and illegal usage
Camp-on or call waiting
When activated, sends a visual audible warning to an off-hook instrument that is receiving another call.
Another option of this feature is to conference with the camped-on or call waiting
Making the called individual a party to a conference without knowing it.
Dedicated connections
Connections made through the PBX without using the normal dialing sequences. It can be used to create
hot-lines between devices i.e. one rings when the other goes off-hook. It is also used for data connections
between devices and the central processing facility
Eavesdropping on a line
The following were incorrect answers:
Account Codes - that are used to:
Track calls made by certain people or for certain projects for appropriate billing
Dial-In system access (user dials from outside and gain access to normal feature of the PBX)
Changing the user class of service so a user can access a different set of features (i.e. the override
feature)
Access Codes - Key for access to specific feature from the part of users with simple instruments, i.e.
traditional analog phones.
Tenanting - Limits system user access to only those users who belong to the same tenant group useful
when one company leases out part of its building to other companies and tenants share an attendant, trunk
lines,etc
The following reference(s) were/was used to create this question:
CISA review manual 2014 Page number 358

Section: Information System Operations, Maintenance and Support