Table 84 switch s1, Table 85 switch s2, Inspect the ntak10 circuit card – Nortel Networks NN43001-301 User Manual
Page 239: Set the switches, Switch s1 - clock controller (cc) configuration, Switch s2 - carrier impedance configuration
Install DTI hardware
239
Inspect the NTAK10 circuit card
Inspect the circuit card before installing it in the Option 11C Cabinet or
Media Gateway:
•
Locate the NTAK10 2.0 Mb circuit card and carefully remove it from its
packaging.
•
Inspect the circuit card for any visible damage that occurred during
shipping.
Set the switches
The NTAK10 incorporates four surface mounted dip switches. The following
tables provide information on the various settings and related functions of
these switches.
Note: The ON position for all the switches is toward 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.
Set the switches on the circuit card according to the requirements of your
installation.
Switch S1 - Clock Controller (CC) configuration
This switch enables and disables the onboard Clock Controller (CC).
Table 84
Switch S1
Switch
Off (Up)
On (Down)
S1-1
Spare
Spare
S1-2
Clock Controller
Enabled
Clock Controller
Disabled
Switch S2 - Carrier impedance configuration
This switch sets the carrier impedance to either 120
3
/
4
or 75
3
/
4
. Twisted pair
cable is usually associated with 120
3
/
4
. Coaxial cable is usually associated
with the 75
3
/
4
setting.
Table 85
Switch S2
Switch
Off (Up)
On (Down)
S2-1
120
3
/
4
75
3
/
4
S2-2
75
3
/
4
120
3
/
4
Nortel Communication Server 1000
ISDN Primary Rate Interface Installation and Commissioning
NN43001-301
02.03
Standard
Release 5.5
7 December 2007
Copyright © 2003-2007, Nortel Networks
.