NEC Univerge SV8100 Features And Specifications Manual page 747

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UNIVERGE SV8100

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:

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 detects whether or not power is needed. Using

a PoE switch makes it easier to protect the IP telephones from loss of power (connection of the

PoE switch to an UPS).

This function is used to establish SIP communication with the main device and RTP communication

among SIP terminals through the NAT on an IP network.

NAT Traversal

The NAPT (Network Address Port Translation) feature gives the SV8100 the ability to "traverse" its

own subnet. With NAPT used in the SV8100, the network administrator can place the

CD-CP00-US and the IPLA (VoIPDB) in the customers LAN while still making it accessible to users

outside the local LAN.

This method is used to convert an address (a WAN-side address for the NAT router) previously

specified in the terminal configuration. For this method, a conversion table is statically set up for

the NAT router, and then a packet for a specific port is transferred to a specific terminal by using

the port forwarding function of the NAT router.

IP Multiline Station (SIP)