The solution will integrate Sterling Bank's 40 branches in the Houston, Dallas, and San Antonio metropolitan areas, as well as its corporate office in Houston and its data centre in central Texas.
AT&T says its high speed IP VPN solution enables Sterling Bank to conduct transactions more quickly and efficiently while enhancing data security and also integrating online banking.
"By enabling Sterling Bank customers to make transactions more quickly and gain real-time access to accurate information about their accounts, AT&T's networking solutions are helping us strengthen our well-established reputation for providing personalised customer service," said David Throgmorton, chief technical officer of Sterling Bank.
"These networking technologies also aid in our business-continuity and data-security initiatives, which are critical service issues for our customers."
In addition to data services, AT&T will provide Sterling Bank with a full range of voice, internet access and teleconferencing services.