yayawoo
Junior Member level 3
I am assigned to repair the ISLU2 line interface card for the AT&T/Lucent 5ESS. There are two chips on the board where I can't find the data sheet anywhere on the web. If there is anyone out there who have any info on these two chips, please help. These two chips are ATT1028CS Sixteen Line Board Controller, and ATTL7553AP (or ATTL7554AP) Subscriber Line Interface Circuit. Both chips have the Lucent logo on them, but they are actually old chips from AT&T. Please help. Many thanks in advance.