I think this is what you are looking for I have seen them on Ebay so any dealer could get one. I copied the summery from Avaya's web sight.
Web Communications Server
With our Web Communications Server your company now has an easy, economical way to enter the world of eBusiness while enhancing your current messaging communications. The server can be installed as a standalone in a switch environment; however, when installed with the MERLIN Messaging Release 2, voice mail and e-mail messages can be retrieved through the same mailbox. You have everything you need to put your business on the Internet, enabling you to:
Establish your own Internet domain name - when integrated with InstantConnectSM from Encanto Networks
Get secure, cost-effective Internet access
Create and host your own Web site and storefront
Process orders with secure credit card transactions
Provide e-mail with up to 200 mailboxes and 100 hours of message storage
This is the link for complete overview
When I tested link in preview post the post dropped the = sign and goes to the wrong page cut and past will work.