Chapter 2: System hardware
Ethernet cabling
Page 2-30
Ethernet cabling
Ethernet standards and cable lengths
All configurations require a copper Ethernet connection from the ODU (PSU port) to the PSU.
Advanced configurations 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.
specifies, for each type of PSU and power supply, the maximum permitted PSU drop
cable length.
specifies, for Aux and copper SFP interfaces, the Ethernet standards supported and
the maximum permitted drop cable lengths.
Note
For optical SFP interfaces, refer to
Ethernet standards supported and maximum permitted cable lengths.
Table 31 PSU drop cable length restrictions
Type of PSU
installed
Power supply
to PSU
Ethernet
supported (*1)
Power output to
auxiliary device
Maximum cable
length (*2)
AC Power
Injector 56V
AC mains
100BASE-TX
1000BASE-T
No
100 m (330 ft)
AC+DC
Enhanced
Power Injector
56V
AC mains
No (*3)
No
300 m (990 ft)
48 V dc
No (*3)
No
300 m (990 ft)
AC mains
100BASE-TX
1000BASE-T
Yes
100 m (330 ft)
48 V dc
100BASE-TX
1000BASE-T
Yes
100 m (330 ft)
CMM5 Power
and Sync
Injector
48 V dc
100BASE-TX
1000BASE-T
Yes
100 m (330 ft)
(*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.