User's Manual

Chapter 3: Engineering guidelines
Contents
This section contains information on the following topics:
System capabilities and limits on page 37
DMC8 engineering guidelines on page 41
System capabilities and limits
This section examines several issues surrounding DECT
capabilities and limits. Information
about system hardware and software parameters is also provided.
System concentration traffic
A
DECT system without concentration supports a maximum number of 1024 handsets. With
the concentration feature, in theory, the handset limit is 510 per DECT Mobility Card x 32 cards
= 16320 handsets. However, in practice, traffic limits the number of handsets per card.
Each IPE card slot supports 32 channels of voice and data at the same time through the DS30X
interface. Concentration removes the existing fixed ratio of 32 handsets per DMC.
Blocking
Calls in DECT
can be blocked at many stages, including the following:
• At the basestation – when all channels (6 or 12) of an basestation are in use, calls through
that basestation (both to and from a Portable Part [PP]) are rejected.
• At the Backbone interface – when the basestations of one DMC together have 32 radio
connections, calls through those basestations (both to and from a handset) are
rejected.
DMC DECT Fundamentals August 2012 37