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5
5.1
5/1531-ANF 901 14 Uen D3 2013-11-28
The load from one inter Media Gateway hand over, that is, between two
Media Gateways controlled by different Telephony Servers, is on the
order of 1/2 of a call. The load from one hand over between ELU31
boards in the same Media Gateway is also on the order of 1/2 of a call.
Hand over between base stations on the same ELU31 is handled on the
ELU31 board and does not cause processing in the Server. However the
total load from hand overs is usually much smaller than the load from
roaming, since hand overs only take place when the users are talking
and moving at the same time.
Appendix A: Multiple DECT
system
DECT systems and how the interference between them affect the avail-
able capacity in the radio environment.
To enable the best possible performance it is important to know that
there are base station planning issues that must be considered. The
issues are not of high concern for planning and commissioning in a
normal home or office environment, however when there is a mix of
multiple residential and/or enterprise DECT systems it should be under-
stood that the shared radio capacity available will be decreased in rela-
tion to the number of systems that are installed within the same coverage
area.
This section will give an overview explanation to the technical issues
concerning installation of multiple DECT systems in one area.
DECT
The DECT standard provides 12 slots on 10 carriers in each direction,
see figure 16 System with three on-going traffic. on page 40. A carrier
uses 2 MHz each and the TDMA frame is 10 ms, these providing 120
available channels in each direction.
A
A: M
PPENDIX
ULTIPLE
DECT
SYSTEM
39
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