NEC DSX-160 User manual

System Configuration
DSX-80/160 Hardware Manual Components ◆19
Components
System Configuration
DSX-80/160 System Load Factor
The combination of lines and extensions you can connect to your DSX system may be limited by the System
Load Factor. Use the DSX-80/160 System Load Factor Worksheet on the next page to verify your system’s
configuration. When entering data on the worksheet, for each installed card make entries for each Load Type.
There are two Load Types to consider: 5 VDC and 40 VDC.
To check your system configuration:
1. Indicate the quantity for each card installed in the Qty column.
- The number of keysets, single line sets, and DSS Consoles does not affect the load factor.
2. For each item and for each Load Type, multiply the Qty times the Load and enter the value in the Total
column.
- For example, two 16ESIU Cards have a load of 16 for 5 VDC and 40 for 40 VDC.
3. Add up the entries in each Total column and enter the values in Item 1: Load Type Totals.
4. Review Item 2: Power Supply Capacity and determine the capacity of the power supplies installed in
your system.
5. Compare the capacities in Item 2to your entries in Item 1. Item 1must always be equal to or less than
the entry in Item 2.
Important
Do not operate your system if the total for either Load Type
exceeds the Power Supply Capacity of your installation.

System Configuration
20 ◆Components DSX-80/160HardwareManual
DSX-80/160 System Load Factor Worksheet
Description Qty
Load Type
5 VDC 40 VDC
Load Total Load Total
CPU Card 1 12 12 0 0
16ESIU Card 8 20
8SLIU Card 5 8
16SLIU Card 10 16
8COIU Card 3 0
16COIU Card 6 0
T1/E1/PRI Card 8 0
Item 1: Load Type Totals
(Cannot exceed Item 2: Power Supply Capacity.)
Item 2: Power Supply Capacity
If you have one power supply installed, the capacity is:
If you have two power supplies installed, the capacity is:
If you have three power supplies installed, the capacity is:
5 VDC = 40
5 VDC = 80
5 VDC = 120
40 VDC = 48
40 VDC = 80
40 VDC = 120
Notes:
• DSX-80 can only have 1 power supply.
• DSX-160 can have up to 3 power supplies. You cannot have more than two 16ESIU Cards per power supply,
regardless of System Load Factor calculations.
• Exceeding the allowed Load Type Total (Item 1) will cause the system’s power supplies to automatically shut down
and/or cause erratic system operation.
• The total of all station, line, DSS Console, and voice mail ports cannot exceed 160.