Introduction - Nortel Enterprise 1000 Reference Manual

Page 98 of 236 NT8D15 E&M Trunk Card

Introduction

553-3023-211 Standard 1.00 June 2001
The NT8D15 E&M trunk card interfaces four analog telephone trunks to the
Succession Communication Server for Enterprise (CSE) 1000. Each trunk
interface connects to a trunk facility using tip and ring leads that carry voice,
ringing, and tone signaling, and to signaling interfaces by E&M leads. Each
unit can be configured independently by software control in the Trunk Data
Block program LD 14.
Up to three analog trunk cards are supported in each Succession Media
Gateway and four analog trunk cards in each Media Gateway Expansion. The
NT8D15 E&M Trunk Card can be installed in Slot 1, 2, and 3 of the Media
Gateway and Slot 7, 8, 9, and 10 of the Media Gateway Expansion.
The NT8D15 E&M trunk card supports the following types of trunks:
• 2-wire E&M Type I signaling trunks
• 4-wire E&M trunks:
— Type I or Type II signaling
— duplex (DX) signaling
• paging (PAG) trunks
Type I signaling uses two signaling wires plus ground. Type II and DX
signaling uses two pairs of signaling wires. Most electronic switching
systems use Type II signaling.