System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
Analog conference with signalling
Page 2-64 Proprietary Information Aastra
The following diagram shows an example of such a cascade.
Figure 2.28: Cascading the analog conference
In node 1, the conference channels 1, 2 and 3 of the CNF A conference
module are configured with subscribers 1, 2 and 3 in the "STANDARD"
mode.
Cascading in node 1 takes place between the CNF A and CNF B module by
configuring the conference channels 4 and 1 to operate in the "STANDARD"
mode. The conference channels 2 and 3 of the CNF B module are
configured to operate in the "STANDARD" mode with subscribers 4 and 5.
Cascading between node 1 and node 2 is executed by connecting
conference channel 4 of node 1 to conference channel 1 of node 2. This
connection is set up in the "STANDARD" mode. The conference channels
2 and 3 in node 2 are configured again to operate in the "STANDARD" mode
with subscribers 6 and 7. Conference channel 4 in node 2 can be used for
further cascading.
2.6.3.1 Analog conference with signalling
The output signal of each analog conference channel (to the subscriber)
represents the sum of all input signals participating in the conference minus
the own input signal.
Each conference channel which detects an active a-bit (a-bit = 0) in the
incoming direction actively participates in the conference. This means, that
its signal is added up to the other signals. A conference channel with an
incoming passive a-bit (a-bit = 1) participates passively in the conference,
i.e. this channel is only listening in.
Starting up a conference
The conference is in its basic status if none of the incoming a-bits (from
subscribers) is active. In the incoming direction, all a-bits are "1". If the
conference detects the first incoming a-bit=0 at one of the conference
SUB SUB SUB
CNF Analog Conference
on KZU FEK (8) module
Sub. 1 Sub. 2 Sub. 3
Conference channels
12
34
SUB SUB
CNF Analog Conference
on KZU FEK (8) module
Sub. 4 Sub. 5
Conference channels
12
34
SUB SUB
CNF Analog Conference
on KZU FEK (8) module
Sub. 6 Sub. 7
Conference channels
12
34
Node 1
Node 2
Port
Port
2 Mbit/s
[1] [2]
[3]
[1] [1]
[1] [1] [1] [1]
[3]
Port
CNF A CNF B