System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
Use of sub-addresses
Aastra Proprietary Information Page 2-47
2.6.2.2 Use of sub-addresses
If not all sub-addresses of a module are used for the EDC, please note the
following:
• If neither the converter nor interface side of a sub-address is involved
in the conference, the corresponding channel can be used for normal
operation.
• If only the converter side or
interface side of a sub-address is involved
in the conference, the side not involved cannot be used.
In an "Expanded Digital Conference", the 8-subscriber or 2 x 4-subscriber
conference option can be used for connecting the subscribers.
Note: If only the converter side of a module is involved in a
conference, the signal FRSTQ must be tied to 0 V. Thus the
module is registered in the system.
2.6.2.3 Conference channel routing
For routing the conference channel, i.e. the so-called main line, a 64 kbit/s
channel is configured in the network. In case of two separate conferences,
an own 64 kbit/s channel must be provided for each conference. These
channels are routed through the network independently of each other.
For routing this conference channel, a "main line" should be defined. The
subscribers are then connected along this main line.
The 64 kbit/s channel of the "main line" is connected to the converters of the
modules. For an 8-subscriber conference, converters 1 and 2 must be used.
In case of a 2 x 4-subscriber conference, converters 1 and 2 must be used
for conference A and converters 5 and 6 for conference B.
The main line is to be routed via converters 1 and 2 and/or 5 and 6 for the
following reason.
If a module involved in a conference is pulled out, the conference channel
between the other subscribers participating in this conference is not
interrupted along the main line. In the corresponding node, the subscriber
signals are transmitted between converters 1+2 or 5+6 via the switching
matrix. Thus, an interruption of the conference can be avoided. However,
please note that other conference subscribers connected via the extracted
module as well as branching sub-lines possibly connected will be
disconnected.
The converters of a module which are not used for main line channel
routing, i.e. converters 3 to 8 in case of an 8-subscriber conference and
converters 3+4 as well as 7+8 in case of a 2 x 4-subscriber conference, can
be used for connecting further conference subscribers via any interface.
Thus, it is possible to include subscribers in a conference via sub-lines.