System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
Configuration
Aastra Proprietary Information Page 2-53
Info no. 21: Exp. Dig. Conf. active
Using this info no., the "Expanded Digital Conference" mode can be
adjusted for the module.
Note: In this case of application, info nos. 26 to 32 must not be
used and have to be set to "0".
Expanded Digital Conference active:
Info no. 21 set to "1".
Info no. 22: Exp. Dig. conf. div.: 8=0 2*4(1-4/5-8)=1
Using info no. 22, you can define as to whether you want to use this module
for switching a large conference with up to 8 sub-addresses or two smaller,
separate conferences with 4 sub-addresses each (sub-addresses 1 to 4 or
5 to 8).
Expanded Digital Conference with 8 sub-addresses:
Info no. 22 set to "0".
Expanded Digital Conference with 2 x 4-subscriber
sub-addresses:
Info no. 22 set to "1".
Info no. 23: Exp. Dig. conf: Master/Slave=0 equal=1
Expanded Digital Conference: Master/Slave operation:
Using this info no. you can adjust whether the digital conference shall take
place in the Master/Slave mode or with equal subscribers.
Master/Slave mode
The tree must be set up starting from the bus Master. The signal from the
Master is sent to all Slaves, whereas the signals supplied by the Slaves are
sent only to the root. This corresponds to a four-wire bus and is basically
appropriate for full-duplex operation.
This mode must also be used if the Master fills the pauses between
telegrams with data other than the Idle signal (e.g. HDLC flags in case of
SISA).
Info no. 23 set to "0".
Expanded Digital Conference: equal
Equal operation
This mode is typical for operation without a permanent Master (e.g.
professional bus with token ring or telephone conference between
subscribers). The signal of each subscriber is sent to all other subscribers.
This corresponds to a two-wire bus and is basically only appropriate for
half-duplex operation.