TEW4976 is designed and recommended to be used as a transmit transformer in T1 and CEPT applications with the following devices:

CRYSTAL CS61535A, CS61574A, CS61575 CS6158A.
Level One LXT304A, LXT305A Complies with ANSI T1.408 and CCITT I.431.

Typical applications are:
• Primary rate ISDN network nodes.
• PBX or computer to T1/CEPT Digital Trunks.
• TDM Multiplexers.