AT&T 555-230-894 User Manual
Option Switch Settings
H-42
September 1995 Issue 1
Figure H-3.
Selection of 75 Ohm and 32 Channel Settings on
TN464
TN464
TN464E/F Option Settings
The TN464 circuit pack interfaces between a 24 or 32 channel Central
Office/Integrated Services Digital Network (CO/ISDN) or tie trunk and the Time
Division Multiplex (TDM) bus.
Office/Integrated Services Digital Network (CO/ISDN) or tie trunk and the Time
Division Multiplex (TDM) bus.
Set switches E and F on the circuit pack to select bit rate and impedance match.
3
8
4
9
5
10
1
6
2
7
1. Backplane Connectors
2. 24/32 Channel Selector
3. 75/120 Ohm Selector
4. 24 Channel
5. 32 Channel (shown selected)
6. 120 Ohm
7. 75 Ohm (shown selected)
8. Faceplate
9. Connector
10. TN464C/D
Figure Notes: