7-42
Networking Guide for Cisco Unity Release 5.x (With Microsoft Exchange)
OL-13844-01
Chapter 7 VPIM Networking
VPIM Concepts and Definitions
• Checks the delivery location to determine whether messages should be encrypted.
• Hands the message back to Exchange for delivery to the Cisco Unity subscriber mailbox(es).
Message Addressing Options
Cisco Unity provides the following ways to address messages to individuals by using a VPIM-compliant
voice messaging system:
• Blind addressing—Blind addressing allows Cisco Unity to send messages without having specific
information about the recipients on the remote voice messaging system (such as their names and
mailbox numbers). To address a message to someone on another voice messaging system,
subscribers enter the delivery location Dial ID and the remote mailbox number of the recipient. See
the “VPIM Networking and Blind Addressing” section on page 7-43 for more information.
• VPIM subscribers—With VPIM subscribers, Cisco Unity has information about the remote users,
such as their names and extensions. Subscribers address messages to VPIM subscribers the same
way that they address messages to regular Cisco Unity subscribers—by extension or by spelling the
name of the recipient. Note that spoken name confirmation is available when a recorded name exists
for the VPIM subscriber. See the “VPIM Subscribers” section on page 7-44 for more information.

Messaging Similarities and Limitations

For the most part, messaging between Cisco Unity subscribers and individuals on a VPIM-compliant
voice messaging system is the same as messaging among Cisco Unity subscribers. For example:
• Messages marked urgent when they are sent are marked urgent when they are retrieved by the
recipient.
• Messages marked private when they are sent are marked private when they are retrieved by the
recipient.
• Subscribers can send messages to Cisco Unity distribution lists that include VPIM subscribers.
• Subscribers can send fax messages, if this is supported by the remote voice messaging system.
Note the following exceptions:
• Requests for read receipts and delivery receipts are both returned as delivery receipts.
• E-mail messages without a voice attachment cannot be sent to VPIM recipients even though
ViewMail allows subscribers to address e-mail messages to them. Instead of being delivered, e-mail
messages that are sent to VPIM recipients are returned to the sender as NDRs.
• When replying to VPIM messages in ViewMail, if subscribers want to send text in the reply, they
must enclose the text in a text file attachment. Whether the recipient receives the text attachment
depends on the capabilities of the remote voice messaging system.
• Messages that are marked as low importance in ViewMail are treated the same as regular messages.
• Messages that are sent to Cisco Unity distribution lists from subscribers on the remote voice
messaging system are not delivered, and an NDR is returned to the sender. Incoming VPIM
messages to Cisco Unity are delivered to subscriber mailboxes only, and cannot be delivered to
public distribution lists.
• Incoming messages must be addressed to the primary extension of the subscriber; messages
addressed to an alternate extension will not be delivered.