Innovaphone IP1200, Руководство администратора

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Page 88 innovaphone gateway
exchange of terminal functions, connection control, the exchange of status
information and data flow control. The standard has been revised several
times; in the third version, it defines the transfer of features. The standard is
derived from the H.320 multimedia standard for ISDN.
H.245
The H.245 protocol standardised by the ITU ( I nternational
T elecommunication U nion) negotiates terminal functions, the control of
logical connections for the transfer of audio data, flow control and the
transfer of further control messages in H.323 networks. In relation to the
terminal functions, H.245 uses the setting of the voice encoding method,
which must be identical to the compression method.
I
IEEE
The IEEE ( I nstitute of E lectrical and E lectronics E ngineers) is an association
of American engineers dedicated to standardisation tasks. Work group 802,
for example, is driving forward the standardisation of local networks.
IP
The task of the IP ( I nternet P rotocol) is to transport data packets from a
sender to a receiver across several networks. The transmission is packet-
oriented, connectionless and non-guaranteed. Even in the case of identical
senders and receivers, the IP datagrams are transported by the IP as
independent data packets. IP guarantees neither the observance of a
particular sequence nor delivery to the receiver, that is, datagrams can be
lost due to network overload, for example.
IPEI
DECT telephones (handsets) have such an IPEI number ( I nternational
P ersonal E quipment I dentity), which can also be regarded as a serial
number and is used for identification in a DECT system.
IP master
The IP1200 that controls all other DECT base stations in an IP DECT system
is often referred to as the IP master. It is possible that it is the same DECT