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SpectraLink Corporation Link WTS Installation and Operation
Part Number: 72-0075-01-C-W.doc Page 5
2.2 The Front Panel of the Link 150 M3 MCU
The MCU's front panel contains the connections to the telephone system, switches to
control system administration, and status LEDs.
1. STEP Button – Selects a specific line or Base
Station during registration process.
2. Mode Switch – Selects the mode of operation for
the Link 150 Wireless Telephone System.
ADMIN: Administration mode, used to set up
system features to match features on the telephone
system.
NORMAL: Normal mode, used during day-to-day
operations.
REGISTER: Registration mode, used to add or
delete Wireless Telephones and Base Stations.
3. DEL/ENTER Button – Removes a registered
Wireless Telephone from the system.
4. IPC IN Port – Used to connect preceding MCUs in
a multi-MCU configuration.
5. IPC OUT Port – Used to connect sequential MCUs
in a multi-MCU configuration or to connect to an Open
Applications Interface (OAI) Telephony Gateway.
6. Error LED – Flashes when the system has detected
an error. When flashing, check the Status LEDs for an
error code.
7. Status LEDs – Indicate system error messages and
status. Refer to LED Status Codes for more
information.
8. Line LEDs – Indicate the line status of each
Wireless Telephone: ringing, in use, or not active.
9. Base Stn LEDs – Indicate the status of each Base
Station.
10. Conn A or B – RJ-21 connector to the cross-
connect demarc block. Connector B is supplied and
used only with 4 wire interface.
11. Power Jack – Connects to the AC adapter to
supply power to the system.
CAUTION: Use only the provided Class II AC Adapter
with output 24VDC, 1A.
12. Grounding Lug- For use on the analog interface
MCU (SCA-5XX).