Lucent Technologies 5 User Manual

Page of 429
MERLIN LEGEND Communications System Release 5.0
System Manager’s Guide  
555-650-118  
Issue 1
June 1997
Customer Support Information 
Page A-16
Other Security Hints 
A
Educating Operators
1
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 
*
10 without this 
verification. Never transfer to extension 900.
Remove the headset and/or handset when the console is not in use.
Detecting Toll Fraud
1
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
Caller or employee complaints that the lines are busy
Increases in internal requests for assistance in making outbound calls 
(particularly international calls or requests for dial tone)
Outsiders trying to obtain sensitive information
Callers claiming to be the “phone” company
Sudden increase in wrong numbers
Establishing a Policy
1
As a safeguard against toll fraud, follow these guidelines for your MERLIN 
LEGEND Communications System and voice messaging system:
Change passwords frequently (at least quarterly). Changing passwords 
routinely on a specific date (such as the first of the month) helps users to 
remember to do so.
Always use the longest-length password allowed.