Siemens 500 Local Power Supply Unit, Product Description, Name, Value, Assignment, 2-18

Product Description

Accessories

2.5.3Local Power Supply Unit

You may need to use an optiset E local power supply unit to extend the range or operate addi- tional options. The local power supply unit has two RJ11 jacks and is packaged with the con- necting cable.

If the supply voltage exceeds 21 V, all devices are reset and any calls in progress released.

Name	Value
Line voltage	220 (230) V
AC line frequency	47-53 Hz
Max. output voltage	50 V
Min. output voltage	30 V
Max. output current	250 mA

Pin	Assignment
1	Not used
2	- pole
3	Tip
4	Ring
5	+ pole
6	Not used

Primary/Client Configuration (see Section 5.5 on page 5-11)

The local power supply can be looped into the connecting line of the primary or client tele- phone.

If a local power supply is connected in front of the client telephone, the phone adapter detects this local power supply

(via pins 2+5) and turns off the power to the client telephone.

In this case, only the signals are received via the UP0/E interface.

If the power to the client fails, the phone adapter reactivates the power supply.

If the local power supply unit is connected in front of a primary telephone, the supplementary power is fed via a diode. Because the optiset E local power supply unit has a higher voltage, it supplies the power to the equipment.

2-18	P31003-E8400-A100-3-7620
	Service Manual