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SpectraLink 6100 MCU: Quick Reference
PN: 1725-36098-001_C.doc
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MCU Status LED Codes
ERROR LED STATUS LEDs Description
OFF Random Cycling The SpectraLink 6100 MCU is powering up. Initialization to follow.
OFF 5 The SpectraLink 6100 MCU is initializing. Code number will change when finished.
OFF 1, 2, 3, or 4 MCU identification number.
ON 1, 2, 3, 4, 5 MCU has not been configured for switch interface type. Assign a switch type to the
MCU.
ON 4, 5 The switch type selected is not supported by this MCU. Verify that the switch type
selected is correct. If the type is incorrect, repeat the steps to select a new switch
type.
ON 1, 3 A Base Station has reported an internal problem. Replace the Base Station. The error
display refers to the Base Station LED that is flashing red. If more than one Base
Station LED is flashing red, it refers to the lowest numbered Base Station.
ON 2, 3 No communication with one or more Base Stations on this MCU. The error display
refers to the LED that is flashing red. If more than one Base Station LED is flashing
red, it refers to the lowest numbered Base Station.
ON 1, 2, 3 Internal communication problem with the MCU. Power cycle the MCU. If the problem
persists, replace the MCU.
ON 4 IPC Problem. Check IPC cabling by disconnecting and reconnecting the IPC cable
joining the MCUs. Connect the Male RJ-21 connector from the appropriate
demarcation block to the designated RJ-21 connector (A or B) on each MCU. If error
still occurs, replace the IPC cable. Replace the MCU if the problem continues.
ON 1, 4 The operator is trying to register a handset on an MCU with no phone lines. Return
the mode switch to the NORMAL position.
ON 2, 4 The MCU was powered on with the mode switch in the wrong position. Turn off the
MCU, move the mode switch to the NORMAL position and turn back on.
ON 3, 4 Configurations on a multi-MCU installation do not match in each of the units. Most
likely to occur when an MCU was just added to the system. Erase the configuration in
the MCU with incorrect configuration definitions (probably the MCU that was just
added).
Note: Do not erase the configurations in all the MCUs. In multiple MCU installations
the handset registration information is shared among the MCUs. This allows you to
replace an MCU without re-registering all the handsets.
ON 1, 3, 4
REGISTER or ADMIN mode selected on more than one MCU at the same time. Check
the MCUs and take one of them out of REGISTER or ADMIN mode.
OR
The operator is trying to place an admin call on MCU #1 with no handset registered to
MCU #1, Line 2. Return the mode switch to the NORMAL position.
ON 2, 3, 4 The MCU was powered on with the mode switch in the wrong position. Turn off the
unit, move the mode switch to the NORMAL position and turn back on.
ON 1, 2, 3, 4 Internal problem with the MCU. Contact Polycom Customer Service for technical
support.
ON 1, 5 Possible Base Station failure. A Base Station that had previously been heard by
another Base Station can no longer be heard. Turn off the MCU, move the mode
switch to the NORMAL position and turn back on. Check to see if system was
powered on with mode switch in the wrong position. If not, contact Polycom Customer
Service.
ON 5 One or more of the Base Stations on this unit is disabled because it is located too
close to another Base Station. The error display refers to the Base Station LED that is
flashing red. If more than one Base Station LED is flashing red, it refers to the lowest
numbered Base Station. Identify which Base Station is disabled and move it away
from the nearest Base Station.
ON 3, 5 The MCUs have incompatible versions of software. Contact Polycom Customer
Service for technical support.