The Nortel NTDW79AAE5 is a single E1/T1 card that replaces existing digital trunks. It also replaces the associated clock controllers.
This card is intended for CS1000E systems and is backwards compatible to small (e.g. Option11C, Option 11C mini, CS1000S) systems on all software releases as well.
The card is based on technology developed for the MG 1000E PRI Gateway and can also be used in the following modes: