Section 2: PCB Installation and Startup
Aspire S Hardware Manual
Section 2: PCB Installation and Startup
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2-27
2
Direct Inward Dial (DID) (2DIOPU-S) PCB
The 2DIOPU-S PCB, with software 2.21 or higher, supports the analog DID and single line telephone inter-
face functions (such as Off-Premise Extension). The function type is assigned in programming for each port.
The DIOPU-S PCB provides:
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2 DID/OPX trunk circuits
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2 DID/OPX trunk status LEDs
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1 PCB status LED
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1 PBXG Grounding Wire
The CN201 connector provides connection to 2 analog DID trunk ports,
which are polarity sensitive (tip to
tip, ring to ring)
. The OPX circuits, however, are not polarity sensitive. The DIOPU-S requires one universal
slot, with 4 maximum PCBs per system. The system will assign either trunk or extension ports to the PCB
based on the system programming (10-03-01). The PCB provides track resistance of 1500 ohms (PB loop)
and 3000 ohms (DP loop) which includes the DC resistance of the terminal.
.
Figure 2-12: 2DIOPU-S INSTALLATION