PCB Installation
RDDU – Direct Inward Dialing Line Interface Unit
4-24 Strata CTX I&M 10/02
Figure 4-18 RDDU Controls, Indicators, and Interface Connectors
Table 4-10 RDDU Controls, Indicators, and Connectors
Control/Indicator/Connector Type of Component Description
Pad switch SW101 (circuit 1)
3-position slide switch Enables -3 dB signal level drop for line circuit.
Pad switch SW201 (circuit 2)
Pad switch SW301 (circuit 3)
Pad switch SW401 (circuit 4)
J1 connector Modular connection Interface connector for DID line circuits 1 & 2
J2 connector Modular connection Interface connector for DID line circuits 3 & 4
DID line circuit 1 CD122 Red LED (top)
Lights to indicate line circuit is in operation.
(Trunk indicator will not light unless RDDU is
connected to a DID line.)
DID line circuit 2 CD222 Red LED
DID line circuit 3 CD322 Red LED
DID line circuit 4 CD422 Red LED (bottom)
Jumper plug P101
3-terminal jumper plug Adjusts for dial pulsing at different loop lengths.
Jumper plug P201
Jumper plug P301
Jumper plug P401
4
J1J2
SW401
SW301 SW201 SW101
LEDs
321
RDDU
RDDU
P401
H M L
P301
H M L
P201
H M L
3 0
3 03 0
3 0
5813
P101
H M L
Backplane Connector
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