Direct Inward Dial (Did) (2Diopu-S) Pcb (Figure 2-12) - NEC Aspire S Manual

Direct Inward Dial (DID) (2DIOPU-S) PCB (Figure 2-12)

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:
● 2 DID/OPX trunk circuits
● 2 DID/OPX trunk status LEDs
● 1 PCB status LED
● 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.
Aspire S Hardware Manual
Section 2: PCB Installation and Startup
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Figure 2-12: 2DIOPU-S INSTALLATION
Section 2: PCB Installation and Startup ◆ 2-27
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