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Functional description 653

Figure 215

Paging trunk operation

— Type I signaling through E and M leads

— Type II signaling with near-end seizure by SB/M leads and far-end

detection by E/SG leads

• 4-wire, DX signaling (see Figure 218 "4-wire DX signaling" (page 656))

• paging trunk operation (see Figure 219 "Paging trunk operation" (page

657)) with:

— support access by low-resistance path at the PG/A1 leads

— paging end-to-end signaling not supported

The functions provided by each unit on the E and M Trunk card include

2-wire signaling, 4-wire signaling, and paging operation as follows:

• 2-wire, E and M Type I signaling (see Figure 220 "E and M Type I

signaling" (page 657)) with:

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311 02.06 Standard

27 August 2008