Install and Administer Trunks
Add TN1654 DS1 Converter (r only)
SI Installation and Upgrades
679
June 2004
NOTE:
Although the TN1654 DS1 converter supports 75 ohms, use the 127A BALUN to convert
the 120 ohms to 75 ohms rather than the switch settings.
NOTE:
Set Circuit Pack Switches (TN1654 DS1 Converter)
on page 681 shows a typical
connection.
Figure 273: DS1 Converter Circuit Pack Switches
.
TN1654 DS1 Converter Switch Functions
Switch
Function
1
Type of Facility
2
Span A Line Impedance (E1 Only) Span
A Framing (T1 Only)
3
Span B Line Impedance (E1 Only) Span
B Framing (T1 Only)
4
Span C Line Impedance (E1 Only) Span
C Framing (T1 Only)
5
Span D Line Impedance (E1 Only) Span
D Framing (T1 Only)
6
Force Fiber Data-Stream Scrambling
Span
Select
D
C
B
A
4
3
2
1
ckdfds1 KLC 091499
ckdfds1 KLC 091499
32
D4
75
24 CH
A
B
C
D
SCRAM
1 2 3 4 5 6