APRIL 20, 2010 -- AT&T Inc. has selected Ciena as one of its Domain Suppliers for optical and transport equipment needed for its IP-based network.

The multi-year selection covers equipment used to expand and maintain AT&T’s metropolitan and long-haul network infrastructure, including use of coherent 100G wavelength capability and OTN switching. Financial terms of the supplier agreement were not disclosed.

AT&T’s Domain Supplier program, launched last September, facilitates a collaborative relationship with its equipment and software suppliers.

The AT&T network carries 18.7 petabytes of IP and data traffic on an average business day, the equivalent of transporting the entire digitized Library of Congress more than 250 times. This traffic volume has doubled over the past four years. The network includes more than 880,000 route miles of fiber-optic cable.