User's Guide Part 1

Planning synchronized networks Chapter 2 Planning considerations
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2-12
UNDER DEVELOPMENT
Feb 2010
Planning synchronized networks
Using PTP LINKPlanner for synchronized networks
TDD synchronization should be planned using LINKPlanner. This will provide the
necessary TDD Frame parameter values which are required to complete a
synchronized installation. Please refer to the
Link Planner User Guide .
TDD synchronization configuration options
The PTP 600 supports the following TDD synchronization configurations:
• Standalone with UltraSync (Figure 2-2): Each l
ink requires an Ultrasync GPS
receiver connected at the master ODU. Use this configuration only for legacy
applications.
• Standalone with PTP SYNC (Figure 2-3): Each link req
uires one PTP-SYNC unit
connected to the master ODU and one compatibles GPS receiver. Use this
configuration where a site contains only one TDD master ODU. The GPS Receiver
and LPU can be replaced by an alternative compatible 1 Hz timing reference.
• Cluster with PTP SYNC and GPS receiver (Figure 2-4): Ea
ch link requires one
PTP SYNC unit. Each site requires one compatible GPS receiver. Collocated PTP
SYNC units are connected together in a daisy-chain. Use this configuration
where a site contains collocated TDD master ODUs in an extended network
where TDD master ODUs are located at multiple sites.
• Cluster with PTP SYNC and no GPS receiver (Figure 2-5): Each link
requires one
PTP SYNC unit. PTP SYNC units are connected together in a daisy-chain. One
ODU is designated as a cluster timing master. Use this configuration where all
master ODUs are collocated at a single site. As this configuration does not
require a GPS receiver, it provides additional flexibility, particularly in
applications requiring rapid deployment.
NOTE
If PTP-SYNC is the selected TDD synchronization method, select a 1 Hz
timing reference for the system. This will normally be a GPS receiver
module.