Install and Administer Trunks
Add TN1654 DS1 Converter (r only)
SI Installation and Upgrades
681
June 2004
Figure 275: DS1 Converter Connections for E1 75-ohm Service — Part 2
Set Circuit Pack Switches (TN1654 DS1
Converter)
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1
Set the configuration switches on the TN1654 as required per site.
2
Set Switch 6 down (disabled).
Switch 6 may not be present (or active) on all TN1654 DS1 Converter circuit packs.
3
Set Switch 1 up for T1 facilities.
All subsequent facility switch settings (Switches 2-5) reflect T1 framing on each of the 4
facilities. See
Examples of typical settings
on page 682.
4
Set Switch 1 down for E1 facilities.
All subsequent facility switch settings (Switches 2-5) reflect E1 impedance on each of the 4
facilities. See
Examples of typical settings
on page 682 for examples.
Figure notes
1
H600-348 quad cable
2
15-pin male D connectors
3
127A BALUN coaxial adapter
4
BNC connectors (transmit/receive)
corresponding to each facility
5
E1 network connection
6
Network interface
h1dfcsu1 LJK 110601
1
2
2
2
2
3
5
5
5
5
5
5
5
5
6
127A
108032301
A 120
T
R
B 120
T
R
C 120
T
R
D 120
T
R
75
75
75
75
E1 120/75 B
ALUN
4
4
4
4
A
7
