SpectraLink Corporation
Installation
Link WTS – Link 3000 MCU
2.1. The Master Control Unit
The Master Control Unit (MCU) is the processing center for calls to and from the
Wireless Telephone system. It consists of at least one primary shelf (MCS300) and may
have up to 19 expansion shelves. Residing adjacent to the telephone switching
equipment, the MCU operates as a standalone, external system while maintaining full
PBX functionality for Wireless Telephone users.
The MCU connects to the telephone system in two ways. The MCU can either interface
with analog ports of the host telephone system or, in many cases, connect directly to the
telephone system (PBX or key/hybrid system) via a digital interface. A digital interface
provides the advantage that all switch features, such as call party name display and
multiple line appearances, are preserved for the end user.
The MCU provides connectivity from the telephone switch to the wireless system
components. Telephony ports for each Wireless Telephone are commissioned from the
telephone switch. Base Stations, which provide the wireless link to the Wireless
Telephones, are wired directly to the MCU.
The Link WTS Topology
Components in the Link WTS are designed in a star topology. At the center is the Link
3000 MCU. The primary shelf contains the system controller, which manages the call
processing for the wireless network. Additional expansion shelf controllers manage intra-
shelf calling and work with the system controller to pass calls within the wireless network
and to the telephony switch. All shelves provide universal slots for up to ten Interface
Modules. Interface Modules connect Base Stations and Wireless Telephones to the
system. Up to 20 shelves can be connected together to maximize the system capacity.
The following diagram illustrates a sample star topology for the Link WTS.
Part Number: 72-0059-01-Ha.doc
Page 12
