Extension Cabling; Figure 2-21 Trunk Cabling - NEC SL1000 Hardware Manual

SL1000
2. Insert the modular plugs of the trunk line cords into the analog trunk modular jacks on the system.
The lightning protectors MUST BE INSTALLED on a trunk.
• Unused CO port (CO2 to CO4) can be used for Audio port (External paging, External MOH or
BGM).
• The program setting must be required when using Audio port instead of Trunk port in the system.
• The External Paging can be set for 408M-A1 PCB at each KSU.
• The External MOH and BGM can be set only one port for each External source in the system.
• Using a single port, Trunk port and Audio port can not be used at the same time.
• Doorphone box can not be used on the Trunk port.

1.6.4 Extension Cabling

Before plugging in the Multiline Telephone, DSS Console, Single line
Telephone, Doorphone or External Sensor Device, ensure all Main and
Expansion KSUs are powered off.
Topaz Terminal does not work properly when it connected.
1. Open the Sub-Cover.
2-16
Modular Plug
Wire Position for each Port
T R T: Tip
R: Ring

Figure 2-21 Trunk Cabling

ISSUE 3.0
Trunk Port Position
CO4 CO3 CO2 CO1
CO2 or Audio in/out
(External paging)
CO3 or Audio in
(External MOH)
CO4 or Audio in
(BGM)
Installation