Impedance matching – Nortel Networks 1000 User Manual
Page 839
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
Copyright © 2003-2008 Nortel Networks
.