Technical information

Messaging 2000 Voice Mail System
Issue 7 June 2001
6-49
Messaging 2000 Voice Mail System
The Messaging 2000 (M2000) System provides Voice Mail services for the
MERLIN Legend Communication System. The system is PC-based and uses the
IBM OS-2 operating system. The system is connected to the Legend system via
line-side VMI ports. These ports allow access to the voice mailboxes associated
with each PBX subscriber.
Maintaining Message 2000 System Security
The M2000 system includes features that can enhance the security of the M2000
system. It is recommended that the end-user review the following security
measures and implement them as appropriate.
 Preventing Callers from Transferring to Extensions Not Assigned M2000
System Mailboxes
On some phone systems, callers can transfer to a system extension and
then use that extension to access an outside line. This is most relevant for
M2000 ports used for outcalls for networking or message notification to a
beeper. By preventing callers from accessing system extensions not
assigned M2000 system mailboxes, the risk of outside callers accessing an
outside line may be reduced. Setting the following parameters on the
Invalid Mailbox tab in System Setup can prevent callers from accessing
non-assigned extensions.
— Transfer Invalid Mailboxes During Hours
— Transfer Invalid Mailboxes After Hours
When these parameters are disabled, callers dialing an extension that has
not been assigned an M2000 mailbox will hear, “Mailbox number is not
valid. Please redial the number of the person you are calling.”
NOTE:
It is recommended that these parameters are set to disable transfer to
invalid mailboxes.
 Impeding Callers from Accessing the Quick Assist Maintenance Mailbox
When Quick Assist is run in Recover Mode, the system can automatically
assign messages with invalid header information to a default mailbox. This
allows the system manager to then copy the messages to the correct
subscriber mailbox. The default for this maintenance mailbox is the last
mailbox number available on the system. For example, on an M2000
system with 4-digit mailboxes, mailbox 9999 is used.
Since it is easier for an outside caller attempting to gain unauthorized
mailbox access to guess a mailbox number such as 9999, it is
recommended that the system mailbox in which unattached messages will
be placed, be specified explicitly. In addition, it is strongly recommended
that this mailbox be assigned a long password that could not easily be
guessed by an outside caller attempting to access the system.