Management Of The Master/Slave Mode (Multisite Network) - Aastra AXD Installation And Maintenance Manual

When a reference clock is no longer valid, the oscillator is set on:
• An average of the last values stored
• After reset, a value programmed at the factory.
The number of the expansion card generating the reference clock is stored by the
operating software.
3.8.4.2

Management of the master/slave mode (multisite network)

For a multisite network with DECT base stations, the various Aastra XS/XL/XD iPBXs
require the same synchronisation signal.
Nota : The AXS12 iPBX allows multi-site DECT synchronisation through the wiring of a
third pair on the base stations.
In this case, DECT synchronisation is provided by one iPBX to the others; it can also be
duplicated if two iPBXs have a digital connection to the RTCP.
Nota : One of the 2 has priority; apart from these 2 iPBXs, all the other iPBXs in the
Aastra XS/XL/XD range can only receive the synchronisation. The UCVX card
has a synchronisation port which can work in Priority Master mode (only one in
the network), Non Priority Master mode (only one in the network) or Slave mode.
The primary ports of the two Master cabinets exchange status signals which enable an
internal logic to select the Active Master iPBX that provides synchronisation to the multi-
sites, and the Passive Master iPBX which acts like a Slave iPBX.
For an Aastra XD, the synchronisation ports are available on the IUCV-D card.
The synchronisation ports of the two UCV-D cards are wired at the same time on the two
IUCV-D connectors. Clock signal validation, both for the primary port and the secondary
port, takes place only on the active card.
Here, the primary synchronisation port provides the bit clock and the DECT multiframe
clock.
Nota : The DECT base stations connected to the integrated S0 accesses of the EXT1-S
and EXT1-S12 cards are synchronised (management of the M bit in the S
frame).
By default, ex factory or after total reset, the iPBX is configured for operation in Master
and Non Priority mode. These 2 parameters which set the operating mode can be
configured from the operating console (see Section
is stored in the iPBX and locked.
Installation and Maintenance Manual - Aastra 5000
Description et caractéristiques d'un PBX
, Document 6). Their current status
1.3
AMT/PTD/PBX/0058/4/6/EN
01/2011 Page 101