
Installing and wiring telephone power supplies
Figure 57: Connecting telephones and other end devices to the 1152B PDU
Ethernet
Switch/Hub
1152A1 Power Distribution Unit
End Device
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data
data
data
spare
spare
data
spare
spare
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Data In
Data & Power Out
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data
data
data
DC +
DC +
data
DC -
DC -
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For
Note:
Be certain to connect correspondingly numbered Data and Data & Power ports.
Connecting cables to telephones and other end devices
An 1152B PDU contains
To safeguard devices that are not enabled, the 1152B PDU detects devices that are not enabled so does not send power. Note that data continues to flow using the Ethernet cable regardless of the status of the end device.
End devices that are not enabled to receive power directly may receive power and data through an external splitter. The external splitter separates the power and data prior to connection to the end device (see Figure 58: Connecting an IP telephone with an external splitter on page 127).