BusinessPhone Communication Platform 7.0
Installation Instruction ASB 150 02 > Boards for ASB 150 02

## MFU (ROF 157 5132/_)

The MFU board provides following functions:

- 4 digital interfaces (selectable 2B+D trunks or S-bus terminals)
- 4 analogue telephone interfaces as on the ELU-A with Message waiting function (polarity reversal), analog CLIP and 4 DTMF receivers.
- 8 digital extension (ELU‑D3-type).
- 4 independent VMU voice channels
- Storing voice & message data (on flash card): System messages, all types of announcements and individual messages (including text messages on telephones with display).

|  | Insert PROM RYS102 538/1 *) |
|  | Insert PROM RYS102 538/2 *) |

*) part of order number: LZY 203 2215/1

#### The ISDN part

##### DIP switches

##### Position 154 to 157

Switch 1 selects the termination on the sender side. Switch 2 selects the termination on the receiver side. Switches 3 and 4 enable remote power feeding to the connected ISDN terminals. Switches 1...4 should be set to ON, if the link is set as S-interface .

Note

At the end of each line a 100 Ohm termination resistor must be installed (e.g. in the last wall outlet).

##### Position 42

When selecting as S- or T-interfaces, first start by setting the T-interfaces using the switches 4, 3, 2 and 1 in consecutive order, then continue with settting the S-interfaces starting with the switches 1, 2, 3 and 4.

##### Position 41

For some customers the DTMF detection is to sensitive. In case of whistling/noisy speech, it might occur that the MFU detects DTMF tones. By switching Switch 1 to ON the early strobe evaluation will be delayed, this avoids that some frequencies in the human speech will be detected as DTMF tones.

#### Settings and ranges on the T-/S-interface

Refer to BTU-B2 (ROF 157 5121/_)

#### The VMU part

The VMU functionality and the (4) registers are available, if the Compact Flash Card is inserted.

For installation and configuration refer to the requirements in the document Start Of Operation (1537-ASB 150 02 Uen).

Note

The VMU will not start up without the internal directories created on the Compact Flash Card.
The unlock key (file named DISK.ULK) must be valid on the compact flash card.

The MFU board can only use Flash cards supplied by ERICSSON. These Flash cards are delivered with a control file called DISK.ULK containing a licence key. This file must not be opened by any tool as this would destroy the file and thus disable the compact flash card. This will cause an error condition indicated by slow flashing of the yellow and green extension LEDs.

The Flash cards will already be pre-configured in the factory with announcements and voice prompts in the proper language (related to the country which has placed the order).

The announcements and the voice prompts can always be adapted according to the customer needs, see the document BusinessPhone 250/50 VMU-HD & MFU (1553-ROF 157 5126 Uen).

In case you need another language version than the pre-configured one, please contact your local Ericsson Support Centre.

The directory structure on the Flash card looks as follows:

    \Info0    \message2    \anno0
    \Info1    \message3    \anno1
              \message4    \anno2
              \message5    \anno3
                            :
                         \annoF

To modify the files on the Flash card a special PCMCIA Compact Flash Card Adapter
(RNKBS 101 02) is required, to plug it into a PCMCIA drive.

##### Limitations

Only four MFU boards may be mounted per system. MFU board(s) can be mixed with VMU-HD board(s) but if a MFU board is installed, none of the old VMU-D boards may be installed in the system.

Wrong: If a MFU board is installed without compact flash card, the complete VMU part is marked inactive. If later on the MFU should be upgraded with a compact flash card, then this can not be done by simply inserting the flash card thus using the hot swapping feature, due to different card type recognition modes.

Right: The MFU without flash card has to be removed completely from the system (from HW and SW point of view) and then the MFU board with plugged-in flash card can be reinserted in the system. The previous programming of the card, has to be done again.

Revision: J © Ericsson Enterprise 2005