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Installation and Maintenance Manual
33
CCU connections
The CCU has the following connectors:-
• Eight four way Krone connectors for the extensions
• Two four way Krone connectors for the Analogue Lines. Two lines are terminated on each connector.
• Three RJ 45 connectors for the Basic rate ISDN interfaces. Two T
0
network connections and one
Internal S
0
connector.
• An RJ 45 for the ISDN Primary Rate interface PRI.
• RJ 11 connector for Serial Interface V24-1.
• 1 Serial port connector RS 323 (V24-2).
• A 2 position screw terminal for a doorstrike connection DS
• An ESP connector.
• A reset switch is provided which provides a warm reset.
• Two 2 pole switches are provided which provide the 100 ohm terminating resistance for the ISDN
Basic Rate terminations, SW1 and SW2.
Door Intercom
The door intercom is cabled to extension 23, the fourth extension on the CCU. To operate the door
intercom it must be programmed in system programming. See the Programming section of the Owner’s
manual.
Doorstrike
The doorstrike port provides a closed relay contact when in the operated condition. The relay contact is
designed for low voltage DC equipment and should not be used for any voltages greater than those
specified within the technical specification.
Connecting a MOH (Music On Hold Module)
Any of the extensions on the system, with the exception of the programming position, can be
programmed as the external music on hold position. The MOH Module is connected to the a,b pair of the
extension.
• The MOH Module is an optional component and must be ordered in addition to the system
• The MOH Module may be used with 40 extension Hotel Software Build 473 (or later)
• The MOH Module may be used with 32 extension System Software Build 474 (or later)