Mike's PBX Cookbook

Installing the PCCIU

Meridian 1 PC Console Interface Unit

The PC-based Console application software must be installed before the PCCIU is installed. Troubleshooting tips are below.

Installing the PCCIU

1. Place the PCCIU flat under the PC monitor with the front panel facing forward.
2. Meridian 1 connector: connect a DB25 system cable to the MDF connector.
3. PC: connect a DB9 RS-232 serial cable to the serial port on the Attendant PC.

PCCIU Rear Connections

4. Attach a headset to the RJ32 jack or a handset to the PJ327 two-prong connector jack on either side of the PCCIU.
Ensure that the brandline plate on the handset connector jack faces forward.

5. Optional: connect the Power Fail Transfer pair (pairs 11 and 36) from the MDF block to the PFTU.

6. Optional: connect a M3900 (digital telephone) to the PHONE connector. Must also connect on the MDF block (BACK_UP). Note: The M3900 can be used as a Night DN or as a backup telephone if the PC fails.

7. Optional: Connect the Night, General_Purpose, and EMER_DN relays to the MDF block.
Note: LDN0 must be configured with EMER_DN for this relay to work properly.

8. Optional: Use the Audio Input/Output jacks to connect third-party audio applications, if any.

PCCIU MDF Connections

Configuring the PCCIU

  1. Ensure that there are three free ports on the digital line card (or four if you've optionally installed a M3900 Telephone).
  2. In LD 12, configure the first two units as the Primary and Secondary Terminal Numbers (TN's). Programming is the same as the M2250: enter 2250 at the TYPE prompt. Configure the third unit as a Power unit (TYPE: PWR).
  3. Optional: In LD 11, configure the fourth unit as a NIGHT_DN / BACKUP_DN (if you installed a M3900 Telephone).
  4. Optional: If you are using a PFTU, configure a free analog line card port in LD 10


Self-test and diagnostics

When the PCCIU powers up, it performs a self-test diagnostic routine:

If a failure occurs during the self-test, the Status LED changes to yellow and the error is indicated by the illuminated Diagnostics LEDs.
Note: Only one error is indicated at a time, in priority order from highest (1) to lowest (7).

Diagnostic LED  
1 2 3 4 Description Priority
LED Off LED Off LED Off LED Off Self-test passed  
Solid Red LED LED Off LED Off LED Off EEPROM failure 7
LED Off Solid Red LED LED Off LED Off Alerter micro failure 6
Solid Red LED Solid Red LED LED Off LED Off Port expander failure 5
LED Off LED Off Solid Red LED LED Off Loopback test failure 4
Solid Red LED LED Off Solid Red LED LED Off Secondary codec failure 3
LED Off Solid Red LED Solid Red LED LED Off Primary codec failure 2
Solid Red LED Solid Red LED Solid Red LED LED Off RAM failure 1

Troubleshooting the Status LED

The front-panel Status LED indicates the following:

Solid Green LEDNormal condition, the PCCIU is working properly.
LED OffThere is no power getting to the PCCIU (from the PBX, on TN3)
» Check the DB25 system cable and the cross-connect wiring at the MDF.
Flashing Red LEDMajor alarm, a system-related error has occurred on the Meridian 1 PBX.
» Disable and re-enable both PC Console TN's (TN1 and TN2) in LD 32 (PRT, TYPE: 2250).
Flashing Green LEDIndicates one of the following:
» PCCIU is in Night Service or Position Busy - check software Busy setting.
» Power Fail Transfer (PFT) is enabled - set the PFT switch OFF (1 = On, 0 = Off).
» Handset not connected properly - the brandline plate on the handset connector jack must face forward.
Solid Red LEDThe PCCIU is not communicating with the PC properly.
» Ensure that the DB9 RS-232 serial cable is connected to the correct port.
» If the cable is connected properly but the Status LED remains red, run the “Standalone test procedure”.
Solid Yellow LEDA failure occurred during the PCCIU self-test diagnostic routine.

Stand-alone test procedure

  1. Disconnect the DB25 system cable to power down the PCCIU and then disconnect the DB9 RS-232 serial cable.

  2. Make a loop between pins 2 and 3 on the PC port at the back of the PCCIU unit. (use a DB9 connector with pins 2 and 3 shorted).

  3. Power up the PCCIU by reconnecting the DB25 system cable. Press the reset button at the back of the unit.

  4. Disconnect the DB25 system cable to power down the PCCIU. Reconnect the DB9 RS-232 serial cable, and then reconnect the DB25 system cable.

  5. If the PCCIU still fails to communicate with the PC, check the DB9 RS-232 serial cable and the PC communication port settings.

In event of PC failure

In the event of PC failure, or loss of synchronization/communication between the PC and the PCCIU, there is no alarm or event indication. The PCCIU Status LED will still show solid green and calls will still present to the console. To remove the console from service until the PC function is restored, activate the Power Fail Transfer (PFT) switch or remove the headset or handset.

Home » Meridian » Hardware » Pcciu In