Specifications
INSTALLING THE DX-120 DX-120 Installation and Maintenance Manual
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Adding a COM4
You can add one COM4 to KSU1 and one COM4 to the KSU2. These modules expand the DX-120 system loop
start CO line interface capacity to a maximum of eight loop start CO line ports in each KSU (16 total loop startCO
line ports when used in KSU 1 & 2).
• When adding a COM4 to either KSU, connect to the 408M/E via the COM4 module ribbon cable.
- This ribbon cable has the logical system address of SLOT 5 in both cabinet 1 (KSU1-408M) and cabinet
2 (KSU2-408E).
• COM4 modules are installed using four 2.0 cm (brass) standoffs.
• Always install the COM4 module beneath the CPM module (in KSU1) by first removing the CPM, installing the
COM4, and then re-installing the CPM. This is required whenever you install the In-Skin Voice Processor.
Adding a COM4 (continued on next page)
CO Line Directory Number Matrix Per Installed Location
408M in KSU1 - SLOT 1 COM4 in KSU1 - SLOT 5 408E in KSU2 - SLOT 1 COM4 in KSU2 - SLOT 5
800, 801, 802, 803 804, 805, 806, 807 808, 809, 810, 811 812, 813, 814, 815