Ericsson G36 User Manual download pdf (Page 18)

Communications systems built to drive business ahead

MD Evolution 8.1

Product News

PN 06:16 Rev A 2006-10-20

Created by ESF/KEP/MA Francois Vaillant

The CCS4-S board provides the -40 Volts source required for remotely power feeding

the radio DECT base stations connected through the system CRE2 and CRO boards.

Voltages CCS4-S Power

+ 5 Volts DC 4.5 A ) 4.5 A

+ 3 Volts DC 1.5 A ) Cumulated

- 5 Volts DC 0.3 A

- 40 Volts DC 2 A

63 Veff – 20/25/50

(+15Vdc-15 mA)

0.75 A selection of

the ringing

frequency

done by switch

Finally, when an internal or external back-up battery is installed, CCS4-S also provides,

in parallel to the system consumption, the current required to permanently load and,

when necessary, recharge the back-up battery that is then mounted in parallel.

CCS4-S board is sized to meet the maximum consumption of a MD Evolution M/ MD

Evolution Mi/ EBN system which is about some 100 Watts. The CCS4-S board has a

MTBF greater than 200,000 hours.

The above voltage dimensioning satisfies all maximal configurations of a system,

whether it is only equipped with wired stations, or DECT wireless base stations. The

rating makes it capable to additionally support the consumption of all 8 radio base

stations that can be connected to the system. And CCS4-S board allows to

simultaneously ring up to 9 analog stations.

CCS4-S description

CCS4-S uses a natural convection for cooling purposes. In the MD Evolution Mi 19-

inch rack, an external fan, part of the cabinet, is connected to CCS4-S.

Optional back-up battery

A back-up battery is not strictly required for the correct operation of the system. It is

however recommended in order to ensure a given system operating autonomy in case

of a mains failure; especially should the mains source not fully reliable. Upon a mains

failure, when the system is fed from the internal or external back-up battery, when

installed, complete system operation autonomy is ensure, including ringing generator.

In practice, the MD Evolution M/ EBN (wall mounted) basic system cabinet supply

includes a 12 V / 7 Ah battery of a sealed lead-acid type (type YUASA NP 7-12 or

equivalent), that is intended to be directly mounted inside the system cabinet. In case

of mains failure, depending on the hardware system configuration, the battery provides

a system operating autonomy from 0.5 to 2 hours.

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Ericsson G36 User Manual Page 18

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