AT&T 518-600-016 manual Button 1x8 Button Hfai 1X5 Digital 1X4, 2x9

TABLE 2-9 Unit Load Calculation Example

VOICE TERMINALS	Qty	Unit Load	Unit Load x Qty	Total
5-Button	8	1	1x8	8
10-Button HFAI	5	1	1X5	5
7406 Digital	4	1	1X4	4
BIS-34D	9	2	2x9	18
BIS-22D	5	1	1x5	5
			Voice terminal total			40
ACCESSORIES	Qty	Unit Load	Unit Load x Qty	Total
Basic Telephone &	5	2	2x5	10
Modem Interface
General Purpose	2	1	1X2	2
Adapter
Hands Free Unit	5	1	1X5	5
			Accessories total		17

3Compute the unit load for all the voice terminals and accessories listed in step 1 by multiplying the quantity of each type by its unit load. See Table 2-9 for an example.

4Add the total unit load computations for voice terminals and accessories.

Example:
Voice terminal unit load total	40
Accessory unit load total	17
Unit load grand total	57

5Review the unit load grand total. Because the total number of unit loads in this sample configuration exceeds 45, this system requires an Auxiliary Power unit.

2-60 Installing the Control Unit