ASCOM Ascotel 2025, Системное руководство

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ascom Ascotel 2025/2045/2065
3.100 Planning a Private Network HBT_20321104_03/B0_en
6.1.7.2 Planning Rules
The object of the planning is as follows:
• To use the clock propagation source to draw up the list of all the possible clock
sources for each PINX (see Fig. 3.54 ).
• To determine the best possible clock source for each system, It is then config-
ured as the initial reference.
Follow the following rules when creating the clock propagation diagram:
• Each T or T2 interface of a system can act as the clock source for that system
and be entered in the clock reference table.
• A T2 interface is preferable to a T interface.
• A connection to the public network is preferable to a connection to the private
network.
• The original reference should always consist of the connection closest to the
public network.
• Each T2 or S external interface is capable of passing the synchronization on to
another system. However, such an interface must not be entered in the clock
reference table or else synchronization loops may occur.
• An S external interface cannot be used as a clock source; it can, however, trans-
fer the clock to another PINX. This should be taken into account when planning
the network.
• A T interface is not suitable for passing on the timing as in fixed networking it
can only be connected either to an S-external interface or to a leased line. How-
ever, an S-external interface cannot receive a clock timing, and the timing from
the public network is always supplied via a leased line.