BusinessPhone Communication Platform 5.1
System Overview ASB 150 02 Release 13

## ASB 150 02

ASB 150 02 is an advanced digital telephone system. This concise description comprises the system’s hardware and functionality.

The trade name of ASB 150 02 is BusinessPhone, which is available in three models:

- BusinessPhone 50
  Built into a compact wall-mounted cabinet for systems with a maximum of 64 extensions.
- BusinessPhone 128i
  Built into 1 - 2 19-inch cabinets, which enables mounting in standard industry 19-inch racks, for systems with a maximum of 128 extensions
- BusinessPhone 250
  Built into 1 - 3 wall-mounted cabinets for systems with up to 200 extensions for office applications and up to 300 extensions for hotels.

The system is highly flexible and can be used as:

- an OPERATOR-assisted PBX system
- a key system
- a cordless system
- an executive/secretary system
- a subsystem to Centrex or other PBXs
- an ACD-system
- a hotel system
- a tenant system (multi PBX)
- as a private network node with Voice over IP or circuit switched lines
- as a Voice over IP (VoIP) gateway for 3rd party PBX´s

A single system can run all of the above-stated applications. The system can be connected to the public exchange via digital and analogue trunks.

### System structure

The figure below shows how all the different units can be connected to the system.

### Central units

#### BusinessPhone 50

The system has a modular structure with printed board assemblies (hereafter boards) mounted in a single cabinet. The cabinet is equipped for 5 board positions and includes a built-in power supply with the option of connecting a battery back-up unit or alternative power feeding with 48 VDC +8V/-5V.The boards are of the same type, as in the BP 250 cabinet.

#### BusinessPhone 128i

The system has a modular structure with printed assemblies (hereafter boards) which are mounted in a 19 inch cabinet.

The cabinet is equipped for 5 board positions and include a build-in power supply. The boards are of the same type, as in BusinessPhone 50 and BusinessPhone 250.

#### BusinessPhone 250

The system has a modular structure with boards mounted in up to three cabinets.

Each cabinet is equipped for nine board positions. Except the first board position in the first cabinet all board positions in the cabinets can be used for all board types. A flat ribbon cable interconnects the cabinets.

The cabinet has a built-in transformer or an optional battery charger for battery back-up, but it can also be fed by an external source with 36 VAC or 48VDC.

The DC supply for the boards is taken care of by the DC converter on the back plane of the cabinet.

### Printed board assemblies

#### Central Processor board, CPU-D4

This board is always mounted in the first position of the first cabinet.

The functions of the CPU-D4 are:

- Central Processor
- Program and data memory
- Conference unit
- Switch
- Real-time clock
- One V.24 port for local operation and maintenance
- Two V.24 ports that can be used for other purposes such as CIL, Hotel Computer or BusinessLink connections.
- One configurable RS 485 long range port
- V.32bis modem for remote maintenance
- Connection of temperature sensors
- FECU connection
- Audio port for music-on-hold.
- Data buffer for 500 call-information logging records in case of V.24 connection failures.

#### Extension line boards

##### Analogue extension board, ELU-A

Connects analogue DTMF or rotary dial telephones and has 4 DTMF receivers on board. This board is available with 8 or 16 extensions. The ELU-A/2 provides reverse line polarity for telephones with a message waiting lamp.

##### Digital extension board, ELU-D3

Connects digital system telephones DBC 2xx. This board is available for 8, 16 or 32 extensions.

#### Trunk line and tie-line boards

##### Analogue trunk board, BTU-A

Board to connect analogue trunk lines. For defined markets the board can also be used for DID. In the event of power failure, 1 to 4 of the trunks (market- dependent) can be through-connected to analogue telephone extensions. This board is available with 4 or 8 trunk lines.

##### Analogue trunk board, BTU-A2

Board for eight analogue lines to the Austrian public exchange. Each analogue line is equipped with a detector for DID and call metering. In the event of power failure, 2 of the trunks can be through-connected to analogue extensions. This board is available with 4 or 8 trunk lines.

##### Digital trunk board, BTU-B2

Board for ISDN Basic Access providing digital connection in the 2B+D format to a public exchange or to a private network as well as subscriber interfaces to S-bus terminals. This board is available with 4 or 8 trunk/extension lines.

##### Analogue trunk board, BTU-C

Board for eight analogue lines to the public exchange. These lines can be used either as eight incoming trunks for in-dialling only, or four of them can also be used as bothway trunks without DID. In the event of a power failure one of the four bothway trunks can be through-connected to an analogue extension.

##### Analogue tie line board, BTU-C2

Board for four analogue lines connected as a tie-line board with 4 individuals for DC-loop signalling.

##### Digital trunk board, BTU-D

Board for a maximum of 30 channel-associated (CAS) digital trunks or ISDN (Primary Rate Access) to the public exchange or to a private network. BTU-D provides the register function to the system for e.g. direct in-dialling, using MFC R2 or MFE signalling on digital trunks, DTMF and TRC detection.

##### Analogue tie line board, BTU-E

Board for tie-line (private trunk) traffic. Each board has 4 individuals with E&M signalling. Voice is transmitted via 2 or 4 wires (a/b). The following signalling formats are supported:

- E&M swedish format
- E&M continuous (A - and D - format)
- E&M discontinuous
- American E&M
- ESPA signalling to connect paging equipment
- CAILHO
- CEPT L1
- SSAC15

##### IP Unit, IPU

The board supports three functions:

- Trunk Gateway
  Gateway between the circuit switched and the IP based telephony in conjunction with a corporate LAN/WAN environment.
  The IPU board acts as an additional trunk board in case of proprietary private network configurations with ASB 150 02 systems. Instead of using leased lines between the network nodes, the existing LAN / WAN environment (10BaseT/100BaseTX) could be used with the same feature level (QSIG+UUS).
- Gatekeeper
  The integrated Gatekeeper function is a full H.323 implementation, which has the main purpose to map the E.164 based directory number of an IP-Extension in ASB 150 02 to it’s IP-address on the LAN and vice versa.
- Extension Gateway
  The Extension Gateway takes care about the signalling and the provisioning of the voice channels to the IP-Extensions (H.323 clients) on the LAN. Up to 128 IP-Extensions can be assigned to one single IPU and it’s integrated Extension Gateway.

Up to 16 bi-directional voice channels are supported by the IPU with the use of the Voice-codecs G.711, G.723.1 and G.729 Annex A (with Annex B)

#### Multi Function Unit board

##### Digital extension, Analogue extension, Digital trunk and Voice memory board, MFU

The following functions are supported by the MFU:

- 4 ISDN Basic Access interfaces providing digital connection in the 2B+D format to the public exchange or private network as well as subscriber interfaces to S-bus terminals
- 4 analogue telephones with 4 DTMF receivers
- 8 digital system telephones
- VMU-HD functionality with 4 voice channels and 4 registers. The digitized speech is stored on a compact Flash card, which is available in following sizes: 8 MB, 16 MB, 32 MB and 48 MB.
  By using the 48 MB Flash card a maximum recording times of 100 minutes at high speech quality mode, and 200 minutes at standard speech quality is provided.

#### Voice memory boards

##### Voice memory board, VMU-HD

Board is used for storing voice messages, voice information, voice announcements and text messages on a flash disk. Additionally functions like Automated Attendant, Mailbox system, DISA and Music-on-Hold are supported. This board provides either 16 simultaneous voice channels or 8 simultaneous voice channels with register function. The flash disk is available in two sizes: 60 MB and 175 MB.
By using the 175 MB Flash disk a maximum recording time of 350 minutes at high speech quality, and 700 minutes at standard speech quality is provided.

#### Integrated Cordless boards

##### Integrated Cordless Control Unit (IC-CU2)

This board controls the communication between the CPU-D4 and up to 7 IC-LUs via an internal bus. It provides connection for the FECU, a printer and a maintenance system installed on a PC. It provides 8 speech circuits and supports 4 DECT base stations.

##### Integrated Cordless Line Unit (IC-LU)

This board connects up to 8 radio DECT base stations providing power feeding, communication on up to 8 voice channels and digital voice-channel transcoding between PCM and ADPCM.

##### Base Stations

The base stations enable radio communication between the Integrated Cordless system and cordless phones. Communication with the Base Station is done via two 2B+D interfaces (4x64 kb/s) providing eight 32 kb/s speech paths. For communication with the cordless phones 120 radio channels are randomly selected.

#### Optional units and daughter boards

##### Boards for call metering, CM

These are daughter boards that are mounted on an analogue trunk board BTU-A or BTU-C to detect meter pulses. One CM board is used for two trunk lines. There are two versions available:

- 50Hz (not for BTU-C)
- 12/16 kHz.

##### Attenuation board, BE12/16

Attenuation board for 12/16 kHz metering pulses required on certain markets. The filter board is connected between the trunk boards and the MDF. The board has 16 individuals and one filter board is mounted in an MDF-type cabinet.

##### V.24-interface board, AUX2

Auxiliary board with 3 V.24 interfaces for connection of peripheral units.

##### V.24-interface board, AUX3

Special software adapted AUX2 board with one V.24 interface which can only be used in conjunction with the PC-OPERATOR.

##### Feature Enabling Control Unit, FECU

The FECU is a plug connected to IC-CU2 or CPU-D4, to define or enable e.g. the permitted functionality in the system or the number of connected cordless phones in the system. The FECU is available in two versions: one for IC-CU2 and one for CPU-D4.

##### Register board, REG

Board containing the register function for MFC R2 and MFE signalling, DTMF and Tone receivers. Used instead of a BTU-D, if only analogue trunks or tie lines are used.

### Auxiliary equipment

#### Call information logging, CIL

The interfaces on the CPU-D4 or AUX2-board, provide call records which contain e.g. called and calling party number, costs of the call, duration etc.

This information can be used with a printer or with a certified Call Accounting Software for further analysis.

#### Door Interface Unit, DIU

The DIU connects the door phone speaker, micro-phone, push button (bell) and door opener via two extension lines to the exchange.

If the door opener is wired separately, only one extension line is needed.

#### Music sources

A peripheral music source can be connected for the functions "background music" and "music-on-hold". The connection can always be set up via an analogue trunk (BTU-A) or via an input on the CPU-D4 board. The music can also be stored on the VMH-HD or MFU flash cards and used for "music-on-hold".

#### Paging

Peripheral radio paging units can be connected to an analogue trunk.

#### Temperature Sensor

An external temperature sensor can be connected to the CPU-D4 and the value of e.g. outdoor temperature can be displayed on digital telephone sets.

#### Voice mail system

External Voice mail systems can be connected to an ASB 150 02 system via the ELU-A. Signalling between the Voice mail system and the PBX will be handled via DTMF-tones over the normal extension line (2 wire).

Revision: W © Ericsson Enterprise 2003