REFILE-UPDATE 1-Juniper to be key AT&T supplier

(Corrects day of week in first paragraph)

* Move could help it gain AT&T business

* Details due Thursday - source

NEW YORK, July 28 (Reuters) - Juniper Networks Inc JNPR.N said on Wednesday it will be named a key supplier to AT&T Inc's T.N network build-out, a move that could help it gain business with the country's top telecommunications carrier.

Juniper will be chosen as a supplier for AT&T’s IP (Internet Protocol), MPLS (Multi Protocol Label Switching), Ethernet and Evolved Packet Core domain, it said.

No further information was available from the company.

A source familiar with the situation said AT&T and Juniper will announce details on Thursday. (Reporting by Ritsuko Ando; Editing by Richard Chang)