AT&T Business Messenger description

AT&T Business Messenger is a mobile messaging tool for the workplace. Business Messaging allows you to do one-to-one chat, group chat and even broadcast messages to coworkers enhancing productivity and making your business communications easier.
Features Include:
• Broadcast messages to 20,000 recipients
• Create groups messages on the fly with the coworkers
• One-to-one chat
• Message delivery confirmation
• Integration from other protocols supported by AT&T Business Messaging (SMTP, SNPP, WCTP, TAP)
• SMS fallback

Only Available for AT&T Subscribers in the U.S.