User's Guide Part 1

Table Of Contents
Chapter 3: System planning Data network planning
“Daisy-chaining” PTP 700 links
When connecting two or more PTP 700 links together in a network (daisy-chaining), do not
install direct copper Cat5e connections between the PSUs. Each PSU must be connected to the
network terminating equipment using the LAN port. To daisy-chain PTP 700 links, install each
ODU-to-ODU link using one of the following solutions:
A copper Cat5e connection between the Aux ports of two ODUs. For details of the Ethernet
standards supported and maximum permitted cable lengths, see Ethernet standards and
cable lengths on page 2-32.
A copper Cat5e connection between the Aux port of one ODU and the SFP port of the next
ODU (using a copper SFP module). For details of the Ethernet standards supported and
maximum permitted cable lengths, see Ethernet standards and cable lengths on page 2-32.
Optical connections between the ODUs (SFP ports) using optical SFP modules at each
ODU. For details of the Ethernet standards supported and maximum permitted cable
lengths, see SFP module kits on page 2-39.
Green Ethernet switches
Do not connect PTP 700 units to Ethernet networking products that control the level of the
transmitted Ethernet signal based on the measured length of the Ethernet link, for example
Green Ethernet products manufactured by D-Link Corporation. The Ethernet interfaces in these
networking products do not work correctly when connected directly to the PTP 700 PSU.
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