Page390 of 544 NT8D15E&M TrunkCard
553-3011-100 Standard14.00 January 2002
Reference List
The following are the references in this section:
•Features and Services (553-3001-306)
•Administration (553-3001-311)
General information
This chapter outlines the characteristics, application and operation of the
NT8D15 E&M Trunk Card. The information is intended to be used as a guide
when connecting customer-provided apparatus to the trunk circuit.
NT8D15 E&M Trunk Card has four identical trunk circuits. Each circuit can
be configured independently by software control. The trunk circuits on the
card support the following types of trunks:
•two-wire E & M type I signaling trunks (non-ESN)
•two-wire dial repeating trunks
•two or four wire tie trunks
•four-wire E & M type I and II signaling type II trunks
(ESN and Non-ESN applications)
•Paging (PAG)
Type I signaling (as on the two-wire E & M trunk) utilizes two signaling
wires plus ground. Type II signaling utilizes tow pairs of signaling wires and
is used by most electronic switching systems.
Table shows a matrix of the trunk types and signaling supported by the
NT8D15 E&M Trunk Card.
Table 1 18
Supported trunk and signaling matrix
Signaling RLM
RLR ATV TIE PAG
CSA
CAA
CAM
2-wire E & M yes yes yes yes yes
4-wire E & M yes yes yes yes yes