Learn more about the Cisco Systems, Inc. BE6S-BRI-M2-K9 Model Brand Cisco Small Business Model BE6S-BRI-M2-K9 Features Features Maximum number of users: 150 Maximum number of mailboxes and voicemail ports: 150 mailboxes and 24 voicemail ports Number of presence users: 150 Number of devices supported: 300 Built for Small-Scale Collaboration Deployments This small-density, integrated router, gateway, and blade server is ideal for small sites that need basic, entry-level voice and IP telephony capabilities, together with powerful, easy-to-use collaboration tools.