Nortel Networks NN43001-301 manual Transmission mode, Line build out, OFF 120 ohm, Not used

NT5D97AA/AB DIP switch settings 131

Trunk interface switches for NT5D97AA/AB

Impedance level and unit mode

The S9/S15 switch selects the impedance level and loop operation mode on DEI2 OR PRI2. Refer to Table 38 "Impedance level and loop mode switch settings" (page 131).

Table 38

Impedance level and loop mode switch settings

Switch	Description	S9/S15 Switch Setting
1	Impedance level	OFF - 120 ohm
		ON - 75 ohm
2	Spare	X
3	Spare	X
4	Unit mode	OFF - Loop operates in the DTI2 mode
		ON - Loop operates in the PRI2 mode

Transmission mode

A per-trunk switch (S4/S10) provides a selection of the digital trunk interface type. Refer to Table 39 "Impedance level and loop mode switch settings" (page 131).

Table 39

Impedance level and loop mode switch settings

Description	S4/S10 switch settings
E1	OFF
Not used

Line build out

A per-trunk set of three switches (S5/S11, S6/S12 and S7/S13) provides the dB value for the line build out. Refer to Table 40 "Trunk interface line build out switch settings" (page 131).

Note: Do not change this setup.

Table 40

Trunk interface line build out switch settings

Description	Switch setting
	S5/S11	S6/S12	S7/S13
0dB	OFF	OFF	OFF

Nortel Communication Server 1000

ISDN Primary Rate Interface Installation and Commissioning

NN43001-301 02.03 Standard

Release 5.5 7 December 2007

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