BusinessPhone Communication Platform 5.1
Fault Tracing

## Procedures

### Check on telephone

The digital system telephones have a built-in self test facility that can be initiated by pressing three keys simultaneously for three seconds. Self test can only be initiated in idle state. Initiate self test and verify that the telephone functions properly. If not replace the telephone.

Telephone type | Keys for initiation of self test | Result of self test ok
DBC 199 | R-button, * and 4 | LED glows steadily
DBC 201 | C,*,4 for one second | All LEDs light up
DBC 202 | C,*,4 for one second | ’Self test ok’ on display
DBC 203 | C,*,4 for one second | ’Self test ok’ on display
DBC 211 | C,*,4 for one second | All LEDs light up
DBC 212 | C,*,4 for one second | ’Self test ok’ on display
DBC 213 | C,*,4 for one second | ’Self test ok’ on display
DBC 214 | O/o,*,4 for one second | ’Self test ok’ on display
DBC 601 | Transfer, * and 4 | No LEDs shall flash
DBC 632 | Transfer, * and 4 | ’Self test ok’ on display
DBC 662 | Transfer, * and 4 | ’Self test ok’ on display
DBC 663 | Bypass, * and 4 | ’Self test ok’ on display

If there is a voice communication problem also check the connection of the telephone handset to the telephone and test using another handset if the original handset is suspected to be faulty.

### Check BMS connection

When encountering communication failures to BMS verify proper settings for the V.24-port and the programmable parameters for the built-in modem and corresponding parameters for RASC on the PC. For more information consult document EN/LZB BS 103 1197 RASC Uen, "RASC".

### Check CSM connection

The Cordless System Manager software installed on a PC requires a connection to the maintenance port on the Cordless System Central Unit (IC-CU_) or to the CPU-D4, either to the maintenance port or via modem. Off-line menus include functions that do not require this connection. Go to the directory in which the Cordless System software has been installed9ply started-up the welcome menu is displayed.

If there is no communication with the Cordless System the message ’No connection with DCT1800. Start Off-line program? Y (Yes/No)’ is displayed. By pressing the <Enter> key the Off-line program is started. If you want the connection with the Cordless System you must now check the connection between the PC and the Cordless System and then select N(o). If communication has not been established yet, the following message ’Waiting for DCT1800 response...’ is displayed. If there is still no communication with the DCT1800 system the message ’No connection with DCT1800. Do you wish to continue? (Yes/No)’ is displayed.

When the communication is established the message ’Loading data from DCT1800, please wait...’ is displayed.

If the Cordless System has been initialized before with a version of the Cordless System Manager older than revision R6, the message ’WARNING: SPU-S parameters not initialized yet. <Enter>’ is displayed. If so, do not forget to execute the ’Restore country data’ command.

### Check on service display DT 288, DT 290, DT 360, DT 368, DT 570

The portable can be switched to service display mode (type DT 310 does not support this function) displaying information regarding the radio interface like BS number, carrier, time slot number, RSSI etc.

When the service display is active, calls cannot be made and incoming calls will terminate the service display mode. To make this display visible while calling, first setup the call and then, via the `R(inquiry)' menu, access the service display menu.

Note

Activating the service display reduces the normal functioning of the portable. It is therefore recommended only to use this facility in exceptional cases, e.g. when service requires such.

#### Activating Service Display Mode DT 360 (A-protocol)

1. Switch off portable
2. Switch on portable with special code:
   (Press the 3 keys simultaneously for more than 1 second).

- A `DCA-Service' menu will appear in the Preference menu. This menu can be removed by switching-off the portable followed by a normal switch-on.

1. Access Preferences menu: 2 x down, yes.
2. Access DCA-Service menu: 1 x up, yes.
3. Access wanted service display option.

The DCA-Service menu has six options available to display different types of information.

#### Explanation of Service Displays

Data is always displayed in hexadecimal numbers. The Base Station number relates to the physical connection in the central Unit.

Note

A portable is always blind for the two adjacent time slots. For example, a portable is locked on a Base Station on TS 5. If it approaches a Base Station that has only one active channel (traffic or beacon) on TS 4 or TS 6, the portable will not see that Base Station. The display remains unchanged until the current channel or the channel of the second Base Station changes. Consider this when using the menu's below.

##### Link Info

The Link Info option can be used for site surveys and commissioning of the system. All information regarding the traffic/beacon channel to which the portable is locked, is visible. The signal strength theoretically varies between /00 and /3F. In practice, values will lie between /07 and /37, of which /07 means noise, /37 means optimum quality. Typical values are /20 .. /29.

##### All - FP + RSSI

This menu can be used to check the traffic that is offered on a certain location. It shows the number of Base Stations within reach of the portable in order of their respective signal strength. The portable displays a list of up to 7 different Base Stations, the maximum a portable can see.

##### FP - Info

This menu allows scrolling through the Base Stations (/00../FF) list. The default Base Station is the first Base Station mentioned in the All-FP+RSSI display; the one with the highest signal strength. By pressing `down/up', you can display other Base Stations. When a Base Station is not in the portable list, the display remains blank. If it is, the display shows the data as specified in the lines above. `N' may change during the display if another Base Station from the portable list is getting a higher/lower signal strength than the one currently displayed.

##### Channel Info

Not applicable to maintenance

##### Time Slots

Not applicable to maintenance

##### Select PUN

This menu is useful for testing purposes when more systems cover the same area. It allows a forced selection of one system on a portable that is programmed for both systems. By selecting a different PUN an engineer can test Base Stations of different systems on the same spot without having to re-initialize his portable.

When `A' is selected, the portable will automatically select systems for which it has access rights. After switching on, the portable is always set to automatic selection.

#### Activating Service Display Mode DT 368 (GAP-protocol)

1. Switch off portable
2. Switch on portable with special code:
   (Press the 3 keys simultaneously for more than 1 second).

- A ‘LinkInfo’ menu can then be accessed via the Info - DCA Service menu. This menu cannot be accessed after a normal switch-on.

1. Access Info - DCA Service menu.
2. Access Linkinfo menu.

Note

It is also possible to access the DCA Service menu when the phone is ‘off-hook’ ie during a call.

The DCA-Service menu has two options available to display different types of information.

##### Link Info

The link info menu has two display options which can be selected by pressing either up or down. The following display is entered by pressing up:

The following display is entered by pressing down:

The Link Info option can be used for site surveys and commissioning of the system. All information regarding the traffic/beacon channel to which the portable is locked, is visible. The signal strength theoretically varies between /00 and /3F. In practice, values will lie between /07 and /37, of which /07 means noise, /37 means optimum quality. Typical values are /20 .. /29.

#### Activating Service Display Mode DT 288 (GAP-protocol)

1. Switch portable ON
2. Press:
3. Press:
   one after the other.
4. Press:
5. Here you will find LinkInfo, FPInfo, RFPInfo, HWIdent , SWIdent, Loggings (OperateTime, ErrorNumber), TestDisplay, DisableDev (deactivates DevServices).

The LinkInfo display shows::

#### Activating Service Display Mode DT 290 (GAP-protocol)

1. Switch portable ON
2. Press:
3. Press:
   one after the other
4. Press:
5. Here you will find LinkInfo, FPInfo, RFPInfo, HWIdent , SWIdent, Loggings (OperateTime, ErrorNumber, NumPowerUps.,WDTimeouts, SWExit, FirstDate), DeviceTest (TestDisplay, TestVibrator, TestBuzzer, TestEarpiece), Disable (deactivates DevServices).

The LinkInfo display shows::

#### Activating Service Display Mode DT 570 (GAP-protocol)

1. Switch off portable
2. Switch on portable with special code:
   (Press the 3 keys simultaneously for more than 1 second).

- A Service menu can then be accessed via the Info menu. This menu cannot be accessed after a normal switch-on.

1. Press:

Note

It is also possible to access the Service menu when the phone is ‘off-hook’ ie during a call.

The Service menu has various options available to display different types of information.

##### Link Info

The link info menu has 4 display options which can be selected by pressing either up or down.

The Link Info option can be used for site surveys and commissioning of the system. All information regarding the traffic/beacon channel to which the portable is locked, is visible. The signal strength theoretically varies between /00 and /3F. In practice, values will lie between /07 and /37, of which /07 means noise, /37 means optimum quality. Typical values are /20 .. /29.

PARI identifies the FixedPart (= entire cordless part of BusinessPhone = IC-CU2)
Manic and Modic are not relevant for BusinessPhone

##### RFP Info

The RadioFixedPart info menu shows al list of all Rfps, which are processed in the database of the portabe.

##### FP Info

The FP (fixed part = entire cordless part of BusinessPhone = IC-CU2) menu shows info about all visible FPs.

##### SST

The SST (Site Survey Tool) menu has 3 display options (Handovers - ON/OFF, LevelBeep - ON/OFF, ErrorBeep - ON/OFF) which can be selected by pressing either up or down.

##### User Log

The User Log menu has 2 display options (Operating - shows operation hours, Date - shows the date of the installation) which can be selected by pressing either up or down.

##### Repair

The Repair menu has 3 test options (Buzzer, Earpiece, Display) which can be selected by pressing either up or down.

### Check on configuration data for trunks

When checking configuration data for trunks verify the following:

- That the selected line signalling diagram agrees with the public network for the relevant trunk and the country specific session is loaded.
- That the country specific session is loaded.
- This can vary depending on the type of public exchange which type of trunk is connected.
- Signalling to public exchange; decadic, DTMF, MFC/MFE or ISDN.
- Supervision times.

### Voltage measurements

System voltages can be measured either using the BMS tool (menu systems- ad-converters) or directly on the backplane. As it is possible to cause a short on the lines during measurement all boards in the cabinet should be removed. Test points on the backplane are accessible only if the CPU-D_ in position 0 is removed (refer to document 1531-BDV11308 for details).

### Check on power supply

Check the secondary voltage of the transformer(~36VAC), generally power supply (48VDC) and battery charger regarding connection to mains and functioning fuses. Check (if installed) the battery condition of the power back-up. Replace (if any) faulty units. The voltages (see drawing below) can be verified on the backplane. As there is always the risk of short circuits these measurements should be done when all boards have been removed.

### System reset

### Check on line network

Checks on the line network can vary in scope depending on the configuration of the line network and type of connection. See the following schematic diagram and use the exclusion method by testing in the order stated.

### Check on programmable parameters for facilities

For facilities and various connection cases there exist a number of programmable parameters that need to be programmed correctly for the facility to function. See "Facilities" in BMS.

In addition there is a traffic group matrix that states the authorisation for different connection cases. The traffic group matrix can be used to verify connection paths, e.g. A may call B but B may not call A.

### Check on resources

Free and utilised resources are specified in the BMS-menu Maintenance-system-resources. Here are stated the number of free PCM-channels, number of free references on VMU, etc. Only the number of free PCM-channels and free references on the VMU-board are of interest. Other information is used only during system testing in conjunction with new development. With the help of the stated information it is possible to determine whether the PBX possesses sufficient capacity.

### Fault checks / correction of intermittent faults

Intermittent faults constitute a considerable problem as it is difficult to verify whether remedial measures eliminated the fault. It is essential therefore to make great efforts to identify in which circumstances the fault occurs. If one is fully or partly successful then one has acquired a possibility of verifying whether the fault really has been eliminated by attempting to repeat the circumstances which gave rise to the fault. If this is not possible the PBX should be checked at suitable time intervals. This is often a matter of judgement and varies from case to case.

The following part of the fault checking relates to the Cordless system with a table describing the class, most probable reason and service class number.

- Column 1 – Fault numbers in sequence
- Column 2 – Service class:

- Class 1 Faults in this class mean that communication with a board or peripheral is lost. In most cases there is a physical reason. Check on proper connection. Execute a Replace Board by the System manager-Control menu and check that the fault disappears. If not successful, proceed to class 3.
- Class 2 Faults in this class can be minor faults that can be cleared by a board reset. Execute a Replace Board by the System manager-Control menu and check that the fault disappears. If not successful, proceed to class 3.
- Class 3 Faults in this class are in most cases fatal errors that require board replacement. It is convenient to ensure that the fault is a hard fault by executing a Replace Board and checking if the fault disappears. If not successful, execute the Replace Board command from the System manager-Control menu and replace the board by a spare board. The new board is automatically tested and taken into service. If the fault persists, call your local supplier for service.

- Column 3 – Fault threshold This column indicates the number of times a fault may occur intermittently. This means that after detection of the fault, the fault does not reappear when tested, see paragraph 2.2. If this intermittent occurrence exceeds its threshold number within 24 hours, a status code S (service) will be written in the Fault Table, a fault report is written in the Service Table and the General Alarm is activated. The counter values are halved every 24 hours. Threshold value 99 is equivalent to infinite.
- Column 4 – Fault description This column gives a brief description of the fault that has occurred.

  Fault Code | Service class | Fault Threshold | Description (Blatt 1 von 2)
  1 | 2 | 2 | Unexpected message/primitive Message received but not within specified time
  2 | 1 | 99 | Board/CPU communication error or time out. Message corrupted or not received
  3 | 2 | 99 | Threshold Fault counter exceeded
  4 | 3 | 1 | Board controller ROM error
  5 | 3 | 1 | Board controller RAM error
  6 | 3 | 2 | Internal loop back error
  7 | 2 | 5 | Peripheral state error- state of periph. differs from state listed in CPU data base
  8 | 1 | 6 | Base Station not present - wiring fault or power lost
  9 | 3 | 2 | Peripheral ROM error
  10 | 3 | 2 | Peripheral RAM error
  11 | 2 | 99 | Peripheral status unknown. Two simultaneous faults: status can not be obtained
  12/13 | 2 | 99 | Board status unknown. No communication with board: status can not be obtained
  14 | 2 | 5 | Peripheral communication error or time out. Message corrupted or not received
  15 | 2 | 2 | Board signalling link was cut. When a board is not polled, it resets itself and after communication has recovered it sends this message to CPU
  16 | 1 | 10 | Board controller poll response error
  17 | 3 | 99 | CPU main processor RAM error
  18 | 3 | 99 | CPU main processor ROM error
  19 | 3 | 99 | CPU EEPROM error
  20 | 2 | 1 | CPU real time clock failure
  21 | 3 | 2 | CPU-poll processor (8031) RAM error
  22 | 3 | 2 | CPU-poll processor (8031) ROM error
  23 | 1 | 2 | CPU-poll processor communication error
  26 | 2 | 5 | Internal buffer overflow
  27 | 2 | 99 | Board controller watchdog reset
  28 | 1 | 2 | HSCX error. Serial communication controller on CPU of signalling high way
  29 | 3 | 99 | Signalling high way down. No communication between CPU and all other boards
  33 | 1 | 1 | Initialization procedure not successful. Due to e.g.: no communication with board
  34 | 1 | 99 | Portable related circuit not present. DTU-channel.
  39 |  |  | PC communication error. When statistics run, logging is stopped. Statistics must be set ON again
  50 | 1 |  | Minimum configuration error
  51 | 2 |  | Subject unreliable. Fault not continuously present
  52 |  |  | Subject could not be tested after maintenance action due to a coincidence-Subject must be verified if operational. It may be ’AVE’ but not working. Reset subject

#### Comment to Fault Codes

Fault 17...26,28, 29: |  | CPU faults. Replacement of the CPU requires up loading of its data to PC first. If not possible any more, down load the new CPU with the most recent up load file on disk.

Fault 35, 36, 37: |  | These faults may disappear automatically. The DTU sends a message to T&M and T&M clears the fault status: L1 = AVE and L2 = AVE. However, the Service Error message remains and the General Alarm as well. They must be cleared by 'Clear Service'.

Fault 52: |  | Maintenance personnel must verify if the subject is operational or not. It may occur that a subject is given `AVE', but not working any more. If not working, reset the subject and wait for new fault.

### Fault reporting

Fault reporting, in accordance with current SAR-routines, shall be made to the support instance and the warning log shall be enclosed either as printout or on diskette. To enable suitable action it is essential that the correct information is provided describing in the best possible way how the fault was initiated (sequences), under which circumstances (state) it occurred (traffic situation and time), how the fault revealed itself and whether it was repeatable. Also state the PBX configuration, which can be obtained by reading out the revision states (see Translation and verification of revision states).

### Update of board positions

Read the revision states of the hardware positions, BMS-menu - boards.

Highlight the relevant row with the cursor and update the board. All programmable data is assigned default values. For extensions and trunks it is also necessary to assign all individuals a telephone number. Normally it should be possible to load configuration data from BMS provided back-up exists.

### Translation and verification of revision states

Ericsson identifies all products by means of a product number and revision state.

An ASB 150 02 exchange is built-up from several sub-products, each with its product number and revision state. Via RASC-menu MAINTENANCE-HW/SW-CPU it is possible to read the product number and revision state of the central program's PROM-set (LZY), PROM (RYS) and linkage unit (CXC).

Via RASC-menu MAINTENANCE-HW/SW-RP it is possible to read the product number and revision state of three different regional control programs per printed circuit board position. The same RASC-menu also permits the device board's product number to be read, however the revision state cannot be read directly although it can be determined with the help of the information in columns PCB and PS.

- PCB contains a digit that indicates the R-state of the PBA's printed circuit board.
- PS code contains a digit that can be related to a modification of the PBA that took place subsequent to the manufacture of the PBA.

In the service advice is stated, for each board's (product number) revision state, the applicable PROM-set (RYS), PS-code and PCB-code.

Note

There also exist prerequisites stipulating which revision states for which products may be combined.

Revision: PH2 © Ericsson Enterprise 2003