Nortel Networks DCT1900 - Manual (Page 109)

Technical Product Manual - DCT1900
Configuration Directions, Introduction
Config-DCT1900/R8/mw 1-1
© 2000-2005
C HAPTER 1
Introduction
The DCT1900 system was developed as a modular system in order to obtain maximum flexibility
in initial configuration and future growth. Each system can be configured to satisfy the specific
customer requirements.
The Configuration Directions provide an explanation of the different factors that influence the size
of a system and their acceptable values. Restricting limitations are also discussed. The factors
that determine the final configuration of a system are:
z number of Base Stations
z number of Portable Telephones in the coverage area
z traffic requirements for the system
Furthermore, the system has a number of restrictions that give limitations to the configuration.
These items are explained in the following chapters.
To determine a system configuration, the limitations of the system must be known first. These are
described in Chapter 2.
The number of Base Stations determine the number of CLCs to be used. The number of CLCs,
together with the cable lengths, define the power requirements for the power supply and the
number of SLUs and/or CLUs to be used. The required number of Base Stations can be found by
doing a site survey. Site Surveys and Base Station powering are discussed in Chapters 3 and 4.
The traffic requirements for a system are determined by the amount of Portable Telephones in the
coverage area (visiting Portable Telephones included), the estimated traffic generated per
Portable Telephone and the GOS accepted by the customer. These figures define the number of
SPUs required. Traffic requirements are explained in Chapter 5.
When the number of each system board type needed in a system is known, the number of
cabinets, power supplies, internal cables, etc. can be calculated. The relationships between all
these parts are outlined in Chapter 6.