Vertical comdial DX-120, Installation And Maintenance Manual

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DX-120 Installation and Maintenance Manual
O
VERVIEW
Configuration
The Vertical DX-120 platform is comprised of one full-featured key telephone model and two modular KSUs (Key
Service Units). Several modules are available for enhanced system applications and configuration expandability.
KSU1 C
OMPONENTS
The CPM (Central Processor Module) is installed inside of KSU1 and connected to the 408M ribbon cable J4 (also
labeled “
To CPM ”).
•
The CPM contains:
-
Two serial ports
-
Two music ports
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One control contact (external paging/LBC/gate control)
-
One external page equipment interface connection
-
Socket connectors for the KSU2 (labeled “2nd Cabinet”), MDM, and VP modules (AAM, 7271C, and
7270C)
•
The standard 408M (part of 7201) contains:
-
4 CO line ports
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1 power failure transfer port for the first CO line circuit
-
8 digital ports
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a ribbon cable (J1, also labeled “COM4”) for connection to the COM4 module (PN 7210) in KSU1
-
ribbon cable sockets (J2 and J3, also labeled “To DPM8/APM4”) for connection of DPM8 (PN 7220) or
APM4 (PN 7230) modules
•
The standard APM4 (part of 7201) contains four analog device ports (installed on ribbon cable J5, also
labeled “APM4”)
KSU2 C
OMPONENTS
The standard 408E contains:
•
4 CO line ports
•
1 power failure transfer port for the first CO line circuit
•
8 digital ports
•
a ribbon cable J1, also labeled “COM4”) for connection to the COM4 module (PN 7210)
•
ribbon cable sockets J2 and J3, also labeled “To DPM8/APM4”) for connection of DPM8 (PN 7220) or APM4
(PN 7230) modules
•
a shielded cable (J4) for connection to CPM socket JP2 (also labeled “2
nd
Cabinet”) in KSU1
Configuration (continued on next page)