Nortel Networks 553-3001-211 manual Trunk interface switches for NT5D97AA/AB, Transmission mode

NT5D97 Dual-port DTI2/PRI2 card Page 331 of 894

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 117.

Table 117

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 selection of the digital trunk interface type. Refer to Table 118.

Table 118

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 119 on page 332.

Circuit Card Description and Installation