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Architecture 839

Impedance matching

The line interface provides for the use of either 75 ohms coaxial or 120

ohms twisted pair cable. The impedance is selected by a switch, as shown

in Table 355 "Impedance matching switch selection" (page 839).

Table 355

Impedance matching switch selection

Cable On Off

75 ohms S2 S1

120 ohms S1 S2

Note:

The ON position for all the switches is towards the bottom of the

card. This is indicated by a white dot printed on the board next to the

bottom left corner of each individual switch.

The line interface provides for the use of either 75ohm coaxial or 120ohm

twisted pair cable. The impedance is selected by a switch, as shown in the

settings table below.

Table 356

Impedance matching switch selection

Cable On Off

75 Ohm S2 S1

120 Ohm S1 S2

Note:

The ON position for all the switches is towards the bottom of the

card. This is indicated by a white dot printed on the board adjacent to

the bottom left corner of each individual switch.

The line interface provides for the use of either 75 ohms coaxial or 120

ohms twisted pair cable. The impedance is selected by a switch, as shown

in Table 357 "Impedance matching switch selection" (page 839).

Table 357

Impedance matching switch selection

Cable On Off

75 ohms S2 S1

120 ohms S1 S2

Note: The ON position for all the switches is towards the bottom of the

card. This is indicated by a white dot printed on the board next to the

bottom left corner of each individual switch.

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311 02.06 Standard

27 August 2008