This topic describes the VPIM option to connect different kinds of voice-messaging solutions.
- VPIM is an industry standard that allows different voice-messaging systems to exchange voice and text messages.
- VPIM is based on the SMTP and MIME protocols.
- Up to 100 locations or systems are supported.
- A maximum of 150,000 VPIM contacts are supported.
Cisco Unity Connection supports the VPIM protocol, which is an industry standard that allows different voice-messaging systems to exchange voice and text messages over the Internet or any TCP/IP network. VPIM is based on the SMTP and MIME protocols. VPIM Networking is supported for use with Cisco Business Edition 6000.
Cisco Unity Connection supports up to 100 VPIM locations and 150,000 VPIM and system contacts in the Cisco Unity Connection directory. These limits apply either to the directory of a single Cisco Unity Connection server, cluster pair, or the global directory in a network.
If you deploy VPIM in an HTTPS network, you can designate one or more Cisco Unity Connection locations in the network as VPIM bridgehead servers. The Cisco Unity Connection server that is configured for VPIM networking is referred to as the bridgehead server. This server handles the configuration of VPIM locations and contacts, depending on your requirements. The VPIM location data and all contacts at the VPIM location (including automatically created contacts) are replicated from the bridgehead to other locations within the network. A VPIM message that is sent by a user who is homed on a Cisco Unity Connection location other than the bridgehead first passes to the bridgehead, which forwards the message to the destination server. Similarly, messages from VPIM contacts are received by the bridgehead and relayed to the home server of the Cisco Unity Connection recipient.