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DEFINITY Enterprise Communications Server Release 6
Installation and Test for Multi-Carrier Cabinets
555-230-112
Issue 5
May 1998
Option Switch Settings
Page B-12TN464E/F Option Settings
B
TN464E/F Option Settings
The TN464E/F DS1/E1 Interface - T1/E1 circuit pack interfaces between a 24 or
32 channel Central Office/ISDN or tie trunk and the TDM bus.
Set the switches on the circuit pack to select bit rate and impedance match. See
Tab le B-8
and Figure B-3.
Figure B-3. TN464E/F Option Settings
Table B-8. Option Switch Settings on TN464E/F
120 Ohms Twisted pair
75 Ohms Coaxial requiring 888A adapter
32 Channel 2.048 megabits per second
24 Channel 1.544 megabits per second
Figure Notes
1. Backplane Connectors
2. 24/32 Channel Selector
3. 75/120 Ohm Selector
4. Faceplate
5. 32 Channel
6. 120 Ohm (shown selected)
7. 24 Channel (shown selected)
8. 75 Ohm
9. Connector
10. TN464E/F DS1/E1 Interface Circuit Pack
3
8
4
9
5
10
1
6
2
7