User's Manual

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14 TDD Synchronization Configuration and Installation
Guide
280
Configure Link Range: This is only displayed (see Figure 154) if All Masters Collocated is
set to “No”. Choo
se “Yes” to enter the range of the link in control below.
Range of This Link: This is only displayed (see Figure 154) if Configure Link Range is set to
“Yes”. Link
Range MUST be less than or equal to “Longest Link in Network”. In some
networks, throughput can be increased by entering the exact range of each link in the wizard.
TDD Holdover Mode: Two values: “Strict” and “Best Effort”. If a PTP 600 master ODU is
configured for a TDD Holdover Mode set to “Strict”, then it will not transmit when
synchronization is lost. On the other hand, a link configured for TDD Holdover Mode set to
“Best Effort” will synchronize when a reference signal is available, but will otherwise use best
efforts to operate in unsynchronized fashion.
TDD Holdover Duration: (Master only). Default value is 60 minutes. Specifies duration of
holdover period following loss of TDD synchronization.
CAUTION: the values entered for the controls in Figure 154 MUST be the same for
maste
r/slave pairs for all the links in the network, except for the attribute “Range of This Link”
which can be entered exactly for better performance.
14.2.3 TDD Synchronization Configuration – Expert Mode
Whe
n “Expert Mode” is selected, the user is required to configure the parameters shown in
Figure 155. As mentioned previously, this is out
side the scope of this document. However,
this mode can be used as informative to ensure that the values of the parameters are the
same for all the links in the network.
When “Expert Mode” is not selected, the controls in Figure 155 are automatical
ly filled by the
software.