NEC Univerge SV8100 Features And Specifications Manual page 634

Issue 1.0
Connecting to an IP Telephone
The Power Save Adapter connects to an analog PSTN (Power Switched Telephone Network) line. For
example, at a small branch office this may be the same line that is used for faxes/modems/etc. The
handset is also connected to the Power Save Adapter – it is necessary to unplug the handset from the IP
telephone and reconnect it to the adapter. This allows the speech path to be redirected to the handset in
the event of a power/network failure.
LAN Connection
The IP telephone has two RJ-45 connections on the back marked PC and LAN. This allows the IP
telephone and a PC to share one cable run and switch/hub port.
If installing an IP telephone at a location that has a PC connected to the data network, one of the following
methods can be used:
Using a different cable:
Leave the PC connected to the LAN.
Patch a switch/hub port to the new cable run.
Connect a CAT 5 straight-through cable from the wall outlet to the LAN port on the IP telephone.
Sharing the existing cable:
Unplug the cable from the PC Network Interface Card (NIC).
Connect the cable to the LAN port on the IP telephone.
Connect a new straight-through patch lead from the PC NIC to the PC port on the IP telephone.
Powering the IP Telephone
Power can be provided to the IP telephone by one of the following methods:
Local Power
The IP telephone has a connector on the back for external power. This is supplied by an AC adapter
that outputs +27VDC requiring a separate power outlet per IP telephone. Loss of power in the
building will prevent the telephones from functioning.
Only use the NEC supplied power supply.
Power Patch Panel
The powered patch panel has two RJ-45 connectors per IP telephone. One port connects to the
switch/hub and the other port connects to the IP telephone. The patch panel contains an integral
power supply, adding power to the spare pairs of the RJ-45.
When the IP telephone is connected to the powered patch panel, the telephone automatically
receives power via the spare pairs on the CAT 5 cable. A local power adapter is not needed.
Power over Ethernet (PoE)
The PoE switch is a switched hub that also provides power over the spare pairs. The switch can be
used with other devices than the IP telephones and will detect if power is needed or not. Using a
PoE switch makes it easier to protect the IP telephones from loss of power (connection of the PoE
switch to an UPS).
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UNIVERGE SV8100
IP Multiline Station (SIP)