BusinessPhone Communication Platform 5.1
System Description ASB 150 02 > Hardware

## Printed board assemblies (boards)

#### CPU-D (ROF 157 5118/1), CPU‑D2 (ROF 157 5118/2), CPU‑D3 (ROF 157 5118/3)

CPU-D_ is the central processing unit for the system. All basic functions necessary for the whole system are located on this board.

- Externally adjustable PCM-clock that can be synchronised to other digital telephone systems
- System switch for PCM-busses with conference unit (MPU) for a maximum of 64 parties
- Realtime clock with battery backup
- Modem (V.22 up to 9600 bd) and 3 bi-directional I/O-ports (V.24) for local and remote connection of operation & maintenance or other I/O (up to 9600 bd)
- Tone generator (PCM) for all traffic tones and 12‑16 DTMF-tones
- Processor monitoring (watchdog) to restart the system if CP or SP malfunctions
- Alarm input for mains power failure
- Alarm output indicating system failure
- Analogue input for background music or music-on-hold
- 1 internal and 3 external temperature sensors
- Measurement of centrally distributed voltages
- Control mechanisms for backplane connection (FC) of the system's device boards
- Communication bus between SP on CPU-D_ and RP on device boards (SC)
- Strapping plug (with red LED) to select between cold and warm start of the PBX
- Processors:

- CP MC 6809: Central processor, traffic
- SP MC 6803: System communication
- RP MC 68HC11: Tones and I/O-functions

- Memory used by CP:

- EPROM (system program): 1 Mbyte
- RAM for data: 320 Kbytes
- on CPU-D3 E2PROM area: 384 Kbytes (not pluggable)
- on CPU-D2 E2PROM: 192 Kbytes (non volatile data, pluggable)
- RAM (call metering data): 8 Kbytes (battery backed-up)
- Dual port RAM for SP: 1 Kbyte

#### CPU-D4 (ROF 157 5124/_)

CPU-D4 is the central processing unit for the system. All basic functions necessary for the whole system are located on this board.

- Externally adjustable PCM-clock that can be synchronised to other digital telephone systems
- System switch for PCM-busses with conference unit (MUSAC) for a maximum of 64 parties
- Realtime clock with battery backup
- Modem (V.22 - V.32bis up to 14.4kbd) and 3 bi-directional I/O-ports (V.24) for local and remote connection of operation & maintenance or other I/O (up to 19.2 kbd). One of the ports is configureable as a RS 485 interface.
- Tone generator (PCM) for all traffic tones and 12-16 DTMF-tones
- Processor monitoring (watchdog) to restart the system if CP or GAL malfunctions
- Alarm input for mains power failure
- Alarm output indicating system failure
- Analogue input for background music or music-on-hold
- Conference function in MUSAC for one conference with 60 conferees or 20 conferences with three conferees or any variants in between
- 1 internal and 3 external temperature sensors
- Measurement of centrally distributed voltages
- FECU connection to enable different system functionality
- Control mechanisms for backplane connection (FC) of the system's device boards
- Communication bus between CP and RP on device boards (SC)
- Strapping plug (with red LED) to select between cold and warm start of the PBX
- connection of PC-OPI
- Processors:

- RP MC 68302 Regional and communication processor
- CP ASIC-CPU(6809) controls traffic, Tones, I/O-functions

- Memory used by CP:

- Flash/EPROM: 1,5 Mbyte
- RAM: 2x128kbyte plus 512kbyte
- BBRAM: in 512 Kbyte steps up to 1024 kbyte
- Dual port RAM CP <-> RP: 1 Kbyte.

#### ELU‑A (ROF 157 5114/n)

This board is available in two configurations. The board is delivered with 8 extensions known as the sub-equipped and with 16 extensions in the standard version.

*) only on board ELU-A2 (ROF 157 5114/2)

ELU-A is a device board for connection of 8 or 16 analogue telephones.

- Local ring generator (25 Hz 80V)
- Connection to the PCM-bus and analogue/digital conversion with DSLAC
- 4 analogue receivers (KRC - Key Receiving Circuit) for DTMF-signalling (digit transmission) from the telephones
- Receiver for decadic pulsing (rotary dial)
- Various transmission parameters can be adjusted by BMS to meet the different market requirements
- Support for indicating "message waiting" *) on certain hotel telephones:

- Reverse line polarity

- Feeding gap when releasing
- Monitoring and remote read-out of system voltages
- Equipment for measurement of generated power on the board for different traffic cases
- Processor:

- RP MC 68HC11 Regional Processor

- Memory:

- 32 Kbytes EPROM (program)
- 31 Kbytes RAM (data)
- 192 Bytes RAM (processor internal)

#### ELU-D (ROF 157 5116/n)

This board is available in two configurations. The board is delivered with 8 extensions known as the sub-equipped and with 16 extensions in the standard version.

ELU-D is a device board for connection of 16 digital system telephones type DBC 6xx, DBC 211, DBC 212, DBC 213, DBC 213 with 2 DSS, DBC 199.

- 16 digital telephone line connections (DASL 2B+D)
- Connection to the PCM-bus with a local switch circuit. Furthermore, the switch adapts the 4 Mbit/sec of the PCM-bus to 2 Mbit/sec, which is used on the board
- Power feed to the connected telephones (-48V DC)
- Processor:

- RP MC 68HC11 Regional Processor

- Memory:

- 32 Kbytes EPROM (program)
- 31,5 Kbytes RAM (data)
- 192 Bytes RAM (processor internal)

#### ELU-D3 (ROF 157 5130/_)

This board is available in three configurations. The board is delivered with 8 or 16 extensions known as the sub-equipped and with 32 extensions in the standard version.

ELU-D is a device board for connection of up to 32 digital system telephones type DBC 6xx, DBC 210, DBC 211, DBC 212, DBC 213, DBC 213 with 4 DSS, DBC 214 with 4 DSS and DBC 199.

- up to 32 digital telephone line connections (QDASL 4 times 2B+D)
- Connection to the PCM-bus with a local EPIC switch circuit.
- Power feed to the connected telephones (-48V DC)
- Remote upgradeable
- Processor:

- RP MC 68302 Regional Processor
- DSP AD2186

- Memory:

- 2x128kx8 EPROM (program)
- 2x128kx8 RAM (data)
- 1152 Bytes RAM (processor internal)

#### BTU-A (ROF 157 5110/n)

This board is available in two configurations. The board is delivered with 4 analogue public lines known as the sub-equipped and with 8 analogue public lines in the standard version.

The standard version of the BTU-A is the ROF 157 5110/n. For the Austrian market a special version, the BTU-A2 (ROF 157 5120/n), is available, featuring on-board call metering and direct in-dialling (DID).

BTU-A is a device board for connection of 4 or 8 analogue public telephone lines.

- 4 or 8 analogue telephone trunk line connections
- 1 to 4 "PFC, Power Fail Circuits" (market dependent). These circuits can connect a reserved telephone to the public telephone line in the event of power failure
- Connection to the PCM-bus and analogue/digital conversion with the DSLAC
- 1 or 2 analogue tone receivers (TRC) for external dial tone detection
- Transmitter for decadic pulsing
- Program control of the telephone lines' data:

- Transmission levels
- Input impedance
- Balance impedance or ATIA
- Sensitivity of the tone receiver
- Sensitivity of the metering receiver

- Processor:

- RP MC 68HC11 Regional Processor

- Memory:

- 32 Kbytes EPROM (program)
- 31 Kbytes RAM (data)
- 192 Bytes RAM (processor internal)

Note

External filter (BDV 11331) for attenuation of 12/16 kHz metering pulses is available for those markets where the level of the metering pulses is so high that they disturb the voice channel on BTU-A.

#### BTU-B2 (ROF 157 5121/n)

This board is available in two configurations. The board is delivered with 4 trunks known as the sub-equipped and with 8 trunks in the standard version.

The BTU-B2 (Bothway Trunk Unit for ISDN Basic Access=BA) is a printed board assembly that can be configured to provide any mix of up to 8 digital trunk or subscriber connections in the 2B+D format. This amounts to a maximum of 16 simultaneous calls with associated B-channels or data calls.

- S-interface
  for connecting up to 8 digital subscriber lines

- This S-interface can service up to 8 terminals on a line and provides remote powering of 2W with 40 V. The ranges of the interface are described in detail in the INSTALLATION INSTRUCTIONS. The line configurations can be short passive bus and extended passive bus.

- T-interface
  for connecting up to 8 digital trunk lines

- This provides the functionality of an ISDN T-interface to the public network or other PBX. An 8 kHz synchronisation pulse can be extracted from 1 out of the 8 interfaces, synchronizing the exchange to either the public network or another exchange.
- If more trunk connections are needed, the BTU-D board is available with up to 30 trunks (Primary Rate Access=PRA).

- Remote upgradeable
- Processor:

- RP1 and RP2 MC 68302 Regional Processor

- Memory: (per RP)

- 128k x 16 (512k x 16) EPROM (program)
- 128k x 16 RAM (data)

#### BTU-C (ROF 157 5111/n)

The BTU-C is available in two versions:

- ROF 157 5111/1 for connecting 8 analogue trunk lines
- ROF 157 5111/2 for connecting 4 analogue tie lines.
- Connection to the PCM-bus and analogue/digital conversion with the DSLAC
- Transmitter for decadic pulsing
- Program control of the telephone lines' data:

- Transmission levels
- Input impedance
- Balance impedance or ATIA
- Sensitivity of the tone receiver

- Processor:

- RP MC 68HCP11A0 Regional Processor

- Memory:

- 32 Kbytes EPROM (program)
- 31 Kbytes RAM (data)
- 192 Bytes RAM (processor internal)

BTU-C (Bothway Trunk Unit) is a printed board assembly with four bothway trunk circuits (BTC) or four DC-loop tie-lines or eight direct indialling trunk lines (ITL).

The following combinations are possible:

- 8 Direct in-dialling trunks
- 4 Both-way trunks or any combination of 4 DID/4 BTC to 7 DID/1 BTC
- 4 DC-loop tie-lines
- 1 "PFC, Power Fail Circuit". This circuit connects a dedicated telephone to the public telephone line in the event of power failure.

The bothway trunks can be equipped with a call metering board CM 12/16.

#### BTU-D (ROF 157 5112/n)

BTU-D (ROF 157 5112/1) is a device board for digital connection to the public network. The connection to the digital public network is utilized with a 30 channel (30B+D) interface.

The board also possesses register signalling transceivers that can be used as a general system resource. They can be connected to any line that requires register signalling.

- 1 digital trunk with 30 channels, 30 B+D with channel-associated signalling (CAS) or ISDN (not available on the REG board)
- 12 register signalling units (RSU)

- MFC or MFE signalling
- DTMF digit reception
- Tone receiver (TRC) for external dial tone

- Connection to the PCM-bus with a local switch circuit. The switch also adapts the 4 Mbit/sec of the PCM-bus to 2 Mbit/sec, which is used locally and by the public network
- Possibility to synchronize the system's PCM-clock (on CPU-D_) with synchronisation signals from the connected public exchange (not available on the REG board).
- Remote upgradeable
- Processors:

- RP MC 68302 Regional Processor (68000-core)
- DSP TMS320C50A Digital signal processor for RSU. The program is loaded from RP

- Memory, RP:

- 1 Mbyte EPROM (program)
- 256 Kbytes RAM (data)
- 1152 Bytes RAM (processor internal)

REG (ROF 157 5112/2) is a sub-equipped BTU-D board providing only the register function.

#### BTU-E (ROF 157 5113/n)

BTU-E is a device board for connecting private analogue tie lines of up to four individuals.

- Connection to the PCM-bus and analogue/digital conversion with the DSLAC
- Transmitter for decadic pulsing
- Program control of the telephone lines' data:

- Transmission levels
- Input impedance
- Balance impedance or ATIA
- Sensitivity of the tone receiver
- 2 or 4 wire speech path selection

The speech connection may be an analogue 2-wire or 4-wire connection with the line signalling transmitted on separate wires, called E&M. The following signalling formats are supported:

- E&M Swedish format
- E&M continuous (A- and D- format)
- E&M discontinuous
- American E&M signalling
- CAILHO
- CEPT L1 (BTU-E2)
- SSAC 15 (BTU-E2)

This board can provide connection for a radio paging equipment supporting the ESPA signalling format.

- Processors:

- RP 68HCP11A0 Regional Processor (HC11-core)
- DSP TMS320C50A Digital signal processor as RSU for CEPT L1 and SSAC 15. The program is loaded from RP

- Memory, RP:

- 128 Kbytes EPROM (program)
- 256x8 bits RAM (processor internal)

#### IC-CU2 (ROF 157 5131)

This board supports the DECT-GAP standard. This standard allows the use of GAP compliant cordless terminals from other manufacturers within the system.

The application Integrated Cordless comprises a Control Unit board (IC-CU2) and optionally one to seven Line Unit board(s) (IC-LU). Depending on the area to be covered a certain number of Base Stations have to be installed. Each Base Station provides a radio coverage (in a cell) for the portable telephone sets that move within the cells.

The Feature Enabling Control Unit (FECU) controls the number of cordless portables that can be handled by the system. The whole system is easy to install and configured with the Cordless System Manager installed on a PC.

The IC-CU2 provides:

- 60 voice channels towards the BP PCM bus
- 3 LEDs for diagnosis and 3 standard LEDs controlled by the boards RP
- Roaming and intercell hand-over
- PC connection for maintenance and printer connection for error logging data.
- connects up to 4 base stations
- 8 concurrent voice channel ADPCM transcoder on the board
- supports remote maintenance with 9.6 kbit/s via CPU-D4 modem

Limitations:

- The IC-system size is limited to 7 IC-LU boards. The IC-CU2 can support 4 Base stations directly and a maximum of 60 base stations in a BP 250 system. The BP 50 and BP 128i support up to 12 Base Stations directly connected to the IC-CU2. Up to 210 portables can be connected to a BP 250 system and up to 64 portables is the limit for the BP 50 and
  BP 128i.
- Only one IC-CU2 board may be installed in a BP250 cabinet furnished with a back panel board PUB5 or higher version. The IC-CU2 should be mounted left of the IC-LU board(s) as the IC-LU boards are not displayed by BMS. All of these boards must be installed in the same cabinet.

#### IC-LU (ROF 157 5129)

This board provides the interface (Upn) 8 x 32 kBit ADPCM channels to the Base Station and synchronises the Base Station to the exchange. The SPU (Speech Processing Unit) takes care of the conversion of PCM to ADPCM and vice versa.

ADPCM |  | Adaptive Differential PCM, a method of reducing the amount of transmitted data. Signal history is recorded and the most probable course is estimated. This information is then transmitted at half of the data rate that standard PCM needs. |
OCTAT-P |  | Octal full-duplex ISDN Upn-interface transceiver |
CLU |  | Cell link unit is the interface to the Base Station featuring remote power feeding either from the back plane or via the external power input at the front of the board from e.g. extra power supply. |
HSCX |  | High-level Serial Communications Controller Extended. |

The IC-LU provides:

- 6 LEDs controlled by the boards RPs

Limitations:

- A maximum of 8 Base Stations may be connected to the IC-LU.
- A maximum of 8 simultaneous calls are available per IC-CU2.

#### IPU (ROF 157 5133)

The IPU board act as:

- Trunk gateway between the circuit-switched telephony of the ASB 150 02 and the packet-switched communication in a LAN environment
- Gatekeeper and Extension-Gateway to support standard H.323 clients.
- I/O Interface for CTI and maintenance purposes

To support these functions the IPU will be treated in two different ways:

- 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 could be used with the same feature level (QSIG+UUS).
- As an additional extension board to control the H.323 clients.

The IPU board provides the following functionality

- Interface to an Ethernet 10BaseT/100BaseTX autosense LAN environment according to IEEE-802.3 for half-duplex and full-duplex operation
- A removeable Compact Flash card controls apart from its SW storage function, the number of the allowed bi-directional Voice over IP channels is licensed in the following steps:

- 4 / 8 / 16 bi-directional voice channels

- Up to 3 (currently only one is supported) optional signal processing submodules (DSM 2) with the following functionality:

- 16 bi-directional voice channels
- Voice-codecs G.711, G.723.1 and
  G.729 Annex A ( with Annex B)
- Echo cancellation
- End-to-End DTMF
- Comfort noise generation
- Silent suppression

- Remote upgradeable
- The used network protocol for Voice over IP calls is based on UDP/IP (IP version 4). The IP address administration is based on a static IP address, BOOTP or DHCP.
- To provide Quality of Service for Voice over IP calls, the IPU supports "Type of Service" (priorisation of voice packets) in the IP header
- Supported protocols

- IPv4
- vendor specific Operation an maintenance protocols
- BOOTP
  coding of speech packets according to RTP
- DHCP
- TCP
- UDP
- FTP
- NTP ( Network Time Protocol)
- H.323 V3
- H.225
- H.245
- propriatary trunk gateway protocol

#### MFU (ROF 157 5132)

MFU provides:

- 4 S-/T- ISDN interfaces with individual link configuration. Each S-interface can service up to 8 terminals and provides remote powering of 2W with 40 V
- 4 analogue telephone interfaces as on the ELU-A with Message waiting function and 4 DTMF receivers
- the first analogue line has increased current functionality
- 8 digital system telephone interfaces as on the ELU‑D3, whereby the DBC 213 and DB 214 telephones are only supported with 2 DSS modules.
- VMU-HD functionality for storing system messages, all types of announcements and individual messages (including text messages on display phones) either in PCM quality 64 kbits/s or utilising a compression algorithm, performed by the DSPs, storing compressed voice data with 32 kbit/s on a Compact Flash card.
- Simultaneous operation of up to 4 voice channels operating either in record- or play-mode and 4 register signalling units if the flash card is mounted.
- Remote upgradeable

The board is delivered with following flash card sizes offering a recording time:

Voice storage capacity
Compact Flash card size (Mbyte) | Medium quality 32 Kbits/sec. (minutes) | High quality 64 Kbits/sec. (minutes)
8 | 33 | 17
16 | 67 | 33
32 | 133 | 67
48 | 200 | 100

This value will be reduced depending on the amount of announcements and infos stored on the Compact Flash card.

#### VMU-HD (ROF 157 5126/n)

VMU-HD provides storage and control of “special” voice data as there are system messages, all types of announcements and individual messages (including text messages on display phones).

- Simultaneous operation of up to 16 voice channels operating either in record- or play-mode or if selected, 8 voice channels and 4 register signalling units (RSU)

- MFC or MFE signalling
- DTMF digit reception
- Tone receiver (TRC) for disconnection tones

- The board stores voice data on the flash disk either in PCM quality 64 kbits/s or utilising a compression algorithm, performed by the DSPs, storing compressed voice data with 32 kbit/s.
- PCMCIA - ATA compatible disk drives together with a DOS-compatible file system for easy down loading of pre-recorded announcements on a PC; the hard disk can then be plugged back onto the board
- The hardware is prepared for the use of flash-disks that are compatible to the PCMCIA - ATA standard.

The following table shows approximate recording time in hours and minutes for different flash disk sizes:

Voice storage capacity
Compact Flash card size (Mbyte) | Medium quality 32 Kbits/sec. (minutes) | High quality 64 Kbits/sec. (minutes)
60 | 240 | 120
175 | 700 | 350

This value will be reduced depending on the amount of announcements and infos stored on the Flash disk.

#### AUX (ROF 157 5119/1), AUX2 (ROF 157 5119/2) and AUX3 (ROF 157 5119/3)

The AUX is a device board providing one V.24 port. The AUX2 board provides three V.24 ports for the connection of peripheral units and the operation & maintenance facility BMS. Additionally the board provides:

- Temperature sensor for operation & maintenance and the possibility to connect 3 external temperature sensors
- Measurement of the centrally distributed voltages
- Processor:

- RP MC 68HC11 Regional Processor

- Memory:

- 32 Kbytes EPROM (program)
- 28 Kbytes RAM (data)

The AUX3 is used when the feature PC operator is required and includes the firmware for this tool.

- Only 1 V.24 port is operational.

#### Base Station (KRC NB 201 03/_, BS 330, BS340)

The Base Station is used in the Integrated Cordless system to provide radio coverage of up to 200m in the open field down to 30m to 50m within buildings. These ranges depend on the type of building material used.

The Base Station interfaces to the IC-CU and IC-LU with at least two wire pairs with power feeding. The Base Station operates on an input voltage range of 12 to 56 VDC (KRC NB 201 03/_) and 21 to 56 VDC (BS330 and BS340). This unit functions as the radio interface to the portables and provides up to 8 speech channels. As defined with DECT, the system selects randomly between 120 radio channels to ensure best possible voice communication.

There are three possibilities for power feeding:

- via the serial communication wires with EPP (extra power pairs)
- or without EPP (extra power pairs) and
- by an external adapter converting the mains to a low DC voltage.

Revision: M © Ericsson Enterprise 2003