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