• The VPIM system name.
• The VPIM system fully qualified domain name that includes the server name.
• One of the following:
  • Determine the IP address of the VPIM system. The address of the system must be a fully qualified domain name server. If Message Networking will use this address to exchange messages with the system, you do not need to obtain the DNS addresses.
  • Determine the IP address of DNS 1 and, if available, DNS 2 and DNS 3. These addresses are the IP addresses through which Message Networking will determine the address of the VPIM remote machine.
• The starting and ending extensions of the voice mailboxes on the VPIM system.

  Note: Exclude address ranges associated with mailboxes that will never receive messages, such as automated attendants, bulletin boards, an so on.

• The prefix or prefixes that the Message Networking system will attach to mailbox IDs so that they fit the Message Networking network address length.
• A specific mailbox ID on the VPIM system that will receive and send a test message through Message Networking.
• If your VPIM supports network updates, make sure that the remote machine is set up to allow incoming and outgoing updates. Most VPIM systems do not support network updates.

Gather the information that you will need when you later administer the dial plan mapping on the Message Networking system.

Obtain the Network Address Length from the General Parameters page on the Message Networking system. This number represents the specific number of digits, usually 7 or 10, required for messages to be sent through the Message Networking system. Generally, the network address consists of the dial plan mapping plus the extension. Usually, for your dial plan mapping, you will use the same area code and local exchange (DID) used to reach the VPIM subscribers via the PBX. You can obtain the area code and local exchange from the switch administrator.

For example, for a system requiring 10-digit dialing, mailboxes in the range 20000 to 29999 might normally be preceded by 555-12. If an outside caller wants to leave a message for mailbox 20001, the caller needs to dial 555-122-0001. This same number can be used to create the network address. In this case, 55512 is the dial plan mapping on the Message Networking system and 20001 is the 5-digit VPIM extension. This example assumes the network address requires 10-digit dialing.

However, it is possible in a 7-digit or 10-digit dialing area that different ranges on the new system could be preceded by different dial plan mapping. Therefore, although some mailboxes are preceded by 555-12, a different extension range 50000 to 59999 might be preceded by 555-34. In this case, an outside caller would dial 555-345-0002 to call mailbox 50002. These numbers can also be used to create the network addresses. In this example, to create the network address on the Message Networking system, you can add a Dial Plan mapping for this remote machine where, for mailbox ranges 50000 to 59999, you administer a Map To of 55534. This configuration adds 55534 to the mailbox IDs in the specified range to create the 10-digit network addresses.

• Use FTP to add subscribers.
• Use self-registration to add subscribers' voiced names (if using this method, have the VPIM system administrator provide the Message Networking Self Registration Agent ID, which can be obtained from the Message Networking General Parameters page.
• Send a message from the new subscriber to an existing subscriber on the Message Networking system.
• Add manually through the Subscriber Administration page.
• Initiate Bulk Add by Range from the Message Networking system.

Message Networking also supports administering subscribers via an LDAP Client using Message Networking's LDAP interface.

• The fully qualified domain name and IP address of the Message Networking system. The VPIM system uses this information to send messages to the Message Networking system.
• The Message Networking network address length.
• The Message Networking network address ranges for other messaging systems in the network. Depending on the specific VPIM system, the address ranges that are required are generally the dial plan mapping entries for each remote machine on the Message Networking system. In other cases, you might need all digits of the address ranges. In addition to the dial plan map, you might need to add a prefix to address messages to the Message Networking system.
• If you need to specify a server type, obtain this information from the VPIM system administrator.
• If you need to specify a protocol type, select VPIM.
  

Note: The VPIM system must pass to Message Networking only those addressing digits used in the Message Networking network. When using telephones, subscribers on the VPIM system might have to dial additional digits to address messages to remote subscribers on the Message Networking network. This is sometimes referred to as a prefix. These digits might be required for the following reasons:

• The VPIM system can identify the addressee as a remote subscriber.
• The VPIM system can identify the remote system where the remote subscriber resides (in this case, the Message Networking system).

Do not administer the VPIM system to pass any other digits to the Message Networking system. Instead, administer the VPIM system so that it strips off these additional addressing digits when it passes the message to the Message Networking system. Only addresses within the ranges specified for Message Networking remote machines (specified in the Dial Plan Mapping) are to be sent to the Message Networking system.