System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
Branching function
Aastra Proprietary Information Page 2-69
Defining the root (Master)
For both applications, an externally connected subscriber unit can be
defined as Master.
This configuration is possible by setting the decentral card slot info. no. 29
to "Root possible at IF" for the DSK module and info no. 29 to "Root for
(analog) conference" for the CNF module (FEK).
All other external conference subscribers will then be used as Slaves.
For special applications it is possible to define several roots (Masters). In
this case, one of the external units connected to the corresponding
interfaces must declare itself as Master by activating a control line. Central
card slot info no. 24 must then be set to "Root independent of C/RTS". If this
Master fails, another possible Master will take over the Master function. The
setup of the new structure will take place automatically.
Automatic tree setup
The tree is set up automatically as soon as the root node (Master) sends out
a forward identifier. This identifier is detected and passsed on by the
subsequent conference nodes. The direction from which this identifier has
been received, will then be defined as return direction to the root (Master).
Definition of a preferred path
If required, a preferred path can be defined. The corresponding
configuration is possible via info no. 14 "Preferred path for conference" of
the decentral card slot data. This direction will then be preferred as return
direction to the root (Master) if the forward identifier has been detected
coming from this direction.
Behavior in case of a fault or failure
Interruptions in the 64 kbit/s channel will be indicated means of an AIS in
the CAS signalling.