Lucent Technologies MERLIN LEGEND Release 6.0 Network Reference Manual page 243

MERLIN LEGEND Communications System Release 6.0
Network Reference 555-660-150
A Customer Support Information
Other Security Hints
Users who are assigned voice mailboxes should frequently change
personal passwords and should not choose obvious passwords.
The system manager should advise users with special telephone privileges
(such as Remote Access, Outcalling, and Remote Call Forwarding) of the
potential risks and responsibilities.
Be suspicious of any caller who claims to be with the telephone company
and wants to check an outside line. Ask for a callback number, hang up and
confirm the caller's identity.
Never distribute the office telephone directory to anyone outside the
company; be careful when discarding it (shred the directory).
Never accept collect telephone calls.
Never discuss your telephone system's numbering plan with anyone
outside the company.
Educating Operators
Operators or attendants need to be especially aware of how to recognize and
react to potential hacker activity. To defend against toll fraud, operators should
follow the guidelines below:
Establish procedures to counter social engineering . Social engineering is a
con game that hackers frequently use to obtain information that may help
them gain access to your communications system or voice messaging
system.
When callers ask for assistance in placing outside or long-distance calls,
ask for a callback extension.
Verify the source. Ask callers claiming to be maintenance or service
personnel for a callback number. Never transfer to
verification. Never transfer to extension 900.
Remove the headset and/or handset when the console is not in use.
Detecting Toll Fraud
To detect toll fraud, users and operators should look for the following:
Lost voice mail messages, mailbox lockout, or altered greetings
Inability to log into voice mail
Inability to get an outside line
Foreign language callers
Frequent hang-ups
Touch-tone sounds
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10 without this
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Issue 1
February 1998
Page A-17