Ethernet Standards and recommended cable length for the PTP 670 /700 radio's

Summary

The article explains the recommended cable length to be used for the PTP 670/700.

Cause

If the cable length exceeds then, it can create an issue in powering the radio or for data traffic, it can create packet drops and errors.

Solution:

All the setups require a copper Ethernet connection from the ODU (PSU port) to the PoE. In the advanced configurations we may also require one or both of the following:

• A copper Ethernet connection from the ODU (Aux port) to an auxiliary device.

• An optical or copper Ethernet connection from the ODU (SFP port) to network terminating equipment or a linked ODU.

For each type of PSU and power supply, the maximum permitted PSU drop cable length will be different

For Aux and copper SFP interfaces, the Ethernet standards supported, and the maximum permitted drop cable lengths are different.

PSU drop cable length restrictions
Picture8Cable

(*1) 10BASE-T is not supported by PTP 670.

(*2) Maximum length of Ethernet cable from ODU to network terminating equipment via PSU.

(*3) Ethernet is provided via optical SFP interface.

Aux and copper SFP Ethernet standards and cable length restrictions
Picture9Cable

(*1) 10BASE-T is not supported by PTP 670.

(*2) Maximum length of Ethernet cable from the ODU to the linked device.

SFP module and maximum cable length

SFP module kits allow connection of a PTP 670 Series ODU to a network over a Gigabit Ethernet interface in one of the following full-duplex modes:

• Optical Gigabit Ethernet: 1000BASE-LX or 1000BASE-SX

• Copper Gigabit Ethernet: 100BASE-TX or 1000BASE-T

SFP module kit part numbers
Picture10Cable

Single Mode Optical SFP Interface (part number C000065L008A)
Picture11Cable

Multi-mode Optical SFP Interface (part number C000065L009A)
Picture12Cable

Note: For the Copper SFP (gig-Ethernet SFP) C000065L010A, we need to follow the ethernet cable length.