PRODUCT OVERVIEW
Principles of operation
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2.10
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19.01.2007
2.3.2 Connections
A connection always involves a pair PT - FT. There are no direct connections between two
PTs.
Call control works similar to a telephone system. This means there are the following phases
during a communication:
1. A call is set up either by the calling party (can be PT or FT)
2. The call is accepted by the called party (normal case). However the system may be busy
or the called party is not ready to answer the call (exceptional case).
3. The communication channel is used for payload data
4. The call is released by any party (normal case) or by the system (exceptional case)
HW 86012/22 provides efficient methods of call control. These are described in more details
in sections 3.3.4.4 and 5.1.10.
Different types of connections are defined by the DECT standard. E.g. a data connection
differs very much from a voice connection. Most available DECT devices only support voice
connections. This explains, why it is usually not possible to send data from a HW 86012/22
to a consumer type of DECT “base station”.
Connection types supported by HW 86012/22 include data connections of type LU3 and
voice connections of type LU1. Explanations of LU1, LU3 are given in the DECT DLC layer
standard EN 300175-4.
HW 86012/22 supports advanced connection set-up including symmetric multi-bearer
connections.