Nortel Networks 553-3001-211 manual Trunk and signaling matrix Trunk types Signaling

Page 616 of 894 NT8D15 E&M Trunk card

Note: In Cabinet systems equipped with Meridian Mail, the Universal

Trunk line card cannot be installed in slot 10 of the main cabinet.

The NT8D15 E&M trunk card supports the following types of trunks:

•2-wire E&M Type I signaling trunks

•two-wire dial repeating trunks

•two or four wire tie 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.

Table 191 lists the signaling and trunk types supported by the NT8D15 E&M trunk card.

Table 191

Trunk and signaling matrix

				Trunk types
Signaling
		RLM/RLR	TIE		PAG	CSA/CAA/CAM
2-wire E&M		Yes	Yes		Yes	Yes
4-wire E&M		Yes	Yes		No	Yes
Legend:
RLM	Release Link Main
RLR	Release Link Remote
CSA	Common Control Switching Arrangement
CAA	Common Control Switching Arrangement with Automatic Number Identification (ANI)
CAM	Centralized Automatic Message Accounting (CAMA) trunk

553-3001-211 Standard 2.00 September 2004