1152B Mid-Span Power Distribution Units
Issue 3 January 2008 127
Figure 58: Connecting an IP telephone with an external splitter
Before connecting telephones or other end devices to the 1152B PDU, determine if the device:
●Is Power over LAN Enabled or not.
If not, you may safely connect the telephone; however, the port supplies no power and
functions as a normal Ethernet data port.
●Requires an external splitter or whether it requires only a single RJ45 connection.
If an external splitter is needed, be certain to use a splitter with the correct connector and
polarity.
●Power requirements are consistent with the 1152B PDU voltage and power ratings.
Refer to Appendix B in the user’s guide that comes with the unit for voltage and power
ratings.
To connect telephones and other end devices to the 1152B PDU1. Connect an Ethernet cable to the telephone using an external splitter or directly (if the
device is Power over LAN Enabled).
2. Connect the opposite end of the same cable to the RJ45 wall outlet.
3. On the front panel of the 1152B PDU, monitor the response of the corresponding port LED.
If it lights up GREEN, the unit has identified your telephone as a Power over LAN telephone.
RJ-45
Male Connector
DC Power
Connector
RJ-45
Female Socket Data
Power
IP
Phone
Connection to
Power over LAN Hub