BusinessPhone Communication Platform 7.0
Installation Instruction ASB 150 02

## System Power Consumption

#### Extension Power Demand

The extension equipment DBC 7xx is not intended to be used with BDVBS 101 0x.

Telephones |  | Current Consumption (typical, mA)
Basic | DBC 199 | 30
| DBC 210 | 14
Lite | DBC 220 | 8,1
Economy | DBC 751 | 38
| DBC 601 | 27
Economyplus | DBC 201 | 30
| DBC 211 | 20
Standard | DBC 752 | 50
| DBC 755 | 50
| DBC 631 | 65
| DBC 202 | 30
| DBC 212 | 20
Office | DBC 222 | 12,5
| DBC 222 + 1 DBY 419 01 | 12,8
Executive | DBC 753 | 75
| DBC 662 | 70
| DBC 203 | 45
| DBC 203 + 1* DBY 409 01 | 47
| DBC 203 + 2* DBY 409 01 | 57
| DBC 213 | 45
| DBC 213 + 2* DBY 409 01 | 45
| DBC 213 + 1* DBY 409 02 | 45
| DBC 213 + 4* DBY 409 02 | 45
Professional | DBC 223 | 12,5
| DBC 223 + 1 DBY 419 01 | 12,8
| DBC 223 + 2 DBY 419 01 | 13,1
| DBC 223 + 3 DBY 419 01 | 13,4
| DBC 223 + 4 DBY 419 01 | 13,7
Operator | DBC 663 | 77
| DBC 214 | 45
| DBC 214 + 1* DBY 409 01 | 45
| DBC 214 + 2* DBY 409 01 | 45
| DBC 214 + 1* DBY 409 02 | 45
| DBC 214 + 4* DBY 409 02 | 45
| DBC 224 | 13,6
| DBC 224 + 1 DBY 419 01 | 13,9
| DBC 224 + 2 DBY 419 01 | 14,2
| DBC 224 + 3 DBY 419 01 | 14,5
| DBC 224 + 4 DBY 419 01 | 14,8
Analoge telephones | 20
TAU 2610 |  | 4
Desktop Adapter | 23
S‑Interface (per physical link) | 50

* with connected external power supply. |  |

#### Base Station Power Demand

To minimise the power dissipation on the serial communication wires EPP should be used extensively. Up to 60 BSs can be connected to a cabinet. Short power peaks can be covered by installing a battery cabinet.

The current limit for remote feeding to the BS per IC‑LU is 1.5A on the 48V if supplied from the backplane and 2.1A when supplied via an external power input at the front of the connector. The total current for all BS must be less than the power supply(s) capacity. The total 48 VDC load on the power supply has to be calculated as follows.

The table states the current demand in mA for a Base Station depending on the cable length and cable diameter.

Cable length | STD | EPP | STD | EPP
0,5 mm Æ | 0,6 mm Æ
0m | 104 | 104 | 104 | 104
100m | 110 | 106 | 108 | 106
200m | 114 | 110 | 110 | 108
300m | 121 | 112 | 114 | 109
400m | 129 | 115 | 118 | 110
500m | — | 119 | — | 112
600m | 121 | 114
700m | 125 | 117
800m | 129 | 118
900m | 133 | 121
1.0km | 139 | 123
1.1km | 146 | 125
1.2km | 152 | 127
1.3km | 160 | 129
1.4km | 171 | 131
1.5km | 183 | 135
1.6km | 204 | 137

This total load for the exchange can be supplied by the battery charger as it is less than 5 A.

#### IAS Power Demand

The IAS needs always 2 board positions. If the IAS board gets the feeding from the back plane, then the IAS can be seen as two peripheral boards (e.g. ELU‑D3). Front feeding of the IAS is always recommended. In case of a BP 250 with battery charger and batteries 0,4 A have to be calculated. In case of an external DC source no current consumption from BP power supply has to be calculated.

#### Power calculation example

##### BDV 113 08

The BDV 113 08 can be equipped with two different power supplies. The transformer unit supplies an AC current that is rectified on the backplane in the cabinet. The available DC current for the transformer unit is 3.5 A. Using the switched mode power supply with battery charger a DC current of 5.0 A is available.

To calculate the available current for the telephone sets subtract 0.8 A for the boards installed in the exchange.

If backup batteries are connected to the BML unit, subtract again 0.5 A for charging the batteries

##### BDVBS 101 0x

Using the switched mode power supply of the BDVBS 101 0x with or without a battery charger, a DC current of 2,1 A is available for the telephones. The current consumption for boards and battery charging need not to be considered.

##### Example:

The BDV 113 08, with battery charging, with 66 different types of connected telephones (see list below), and 7 already installed Base stations. One more Base Station shall be installed. Can it still be supplied by the Battery charger?

#### Extension Equipment

Line Equipment | Quantity | Current (mA)
DBC 220 | 32 | 259,2
DBC 222 | 10 | 125
DBC 223 | 3 | 37,5
DBC 224 | 1 | 13,6
Total: | 46 | 435,3

#### Base station

Line length to the 8th Base Station: | 700 m
Cable diameter (f) | 0,6 mm
Assuming 7 Base Stations are already connected they consume a current of: | 1.300 mA
Current of BS 0,6 (f) and 700m: | +117 mA
Total current for all Base Stations is: (This current can be supplied by the back plane) | 1.417 mA

#### Total

Power demand for: | Current (mA)
Base stations | 1417 mA
Telephones: | 435 mA
Battery charging | 500 mA
Peripheral boards | 800 mA
Total load on power supply: | 3152 mA

The total load for the exchange can be supplied by the battery charger as it is less than 5A.

Revision: J © Ericsson Enterprise 2005