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Technical Information on how to make tests on a Nortel Smile console that is faulty by Firebird Scrambler
Posted: 6 Jun 09

Some of the information listed here isn't available from the Quentris website. Some access is available, but is very limited for advanced help.

How to access the SMILE Support website

Connect to http://www.smileconsole.com .  There you will find (free of charge) the User Guides, the Technical Guides, the FAQ's, the downloadable Technical e-Training.

The Quentris support department has issued some information on how to test the fuses on the back of the unit. However it's easier to use a multi meter and test the soldered on fuses inside the unit as follows.

Disconnect the two Smile console cables from the back of the unit. Turn it upside down and remove the middle Philips screw.
 
All that you need to do is to place your hands on the front at each end where the headset plugs in and pull it towards you so that the front panel & circuit board comes out. At the back and right hand side of the board are four soldered on fuses below the CIU connection cable (My screwdriver is shown next to them) which can be tested for continuity with a multi meter.

If any of them don't make a circuit or connection, then the CIU is faulty & has to be replaced. From experience with this unit, it appears that the first versions that were issued (Nortel item code NTAG58AA) are prone to failures. I would recommend asking if a later version from the supplier is available such as the NTAK58BA etc.

Another area to check for continuity is on the CIU connector port. Here is part of Quentris help (FAQ) guide below, converted into English west country style!..

During installation, the 1st and or the 2nd TN fuses can blow inside the Smile CIU because the wiring from the PBX was incorrect. The blown fuses cause the unit to "float" because a ground (earth) was not provided.
To diagnose any faults, read through the details below before using a multi meter!.

1) Disconnect the CIU from the PBX by removing the DB25 connection labeled "Meridian 1" on the rear of the CIU

2) Using an ohmmeter, measure the resistance between:
pin 2 and pin 13 on the "Meridian 1" connector & also pin 3 and 13 on the "Meridian 1" connector
View from the rear of the CIU unit:
 ________________________________
\1  2  3  4  5  6  7  8  9  10  11  12  13/
 \14________________________ 25/

The readings should be approximately 0 ohms. If the measurements indicate an open or high resistance reading, then the fuses have blown! When the fuses blow, the CIU does not have a ground reference and many weird errors can be experienced. The customer will need to order a new CIU unit. These fuses are not field replaceable as they are soldered onto the circuit board.
NOTE! Please also check the wiring to the CIU as described below.

The next area to check is the DC voltage output from the Meridian 1 / Succession system. One thing to be aware of is that the Smile console only requires one Power TN. The information below is useful to check from the Wiring frame & also at the console end.

View from the front of the 25 way female DB25 multi cable connector:
 ________________________________
\13  12  11  10  9  8  7  6  5  4  3  2  1/
 \25________________________ 14/

3) Check the wiring from the PBX to the Attendant PC CIU:
a) Measure the following DC voltage readings on the female DB25 "Meridian 1" cable that plugs into the CIU from the PBX:
- pin 14 and pin 2 - First TN - pin 14 should be positive (approx 28 volts DC)
- pin 15 and pin 3 - Second TN - pin 15 should be positive (approx 28 volts DC)
- pin 25 and pin 13 - Third (Power) TN - pin 25 should be positive (approx 28 volts DC)
If any of these readings are in error, then check all wiring from the PABX, MDF and wall jacks. Since all three TN's come from the same XDLC card. You can use an alternate ground for isolating the faults. For example, if the first TN does not read approx 28 VDC, measure between pin 14 and pin 3. If this measurement is ok, then the ground (earth) on the first TN is bad.

The following details listed below are the pin outs and colour codes of the DB25 to a RJ45 Switch Termination Color DB25 RJ45 pin connector.

  Default TJF/CIU    Description    Function    DB25 to RJ45    DB25/RJ45    DB25/Viking
       Wiring          of port       of pin    pin connections   colour        colour
  White / Blue       primary TN     tip pin       14     5       Green       Green/White
  Blue / White       primary TN     ring pin      2      4       Red            White
  White / Orange     secondary TN   tip pin       15     1       Blue        Blue/White
  Orange / White     secondary TN   ring pin      3      2       Orange         Red
  White / Grey      ASM / power TN  tip pin       25     3       Black  Green/White/Black   
   Grey / White     ASM / power TN  ring pin      13     6       Yellow       Red/White

The cable may be different in other countries and the DB25 might use different connectors or have the console end cut off & re terminated onto e.g. a Krone strip.

 I hope that this little guide helps in deciding which item is suspect or faulty.
 

Back to Nortel: CS1000 (Meridian) systems FAQ Index
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