Section 3 Providing Power; Section 4 Peer-To-Peer; Figure 9-2 Typical Network Ip Connection - NEC Sl2100 Networking Manual

ISSUE 1.0
Ethernet PC
If installing an IP telephone at a location that already has a PC connected to the data network, it is
possible to use either of the following methods:
• Use a different cable and complete the following steps:
- Leave the PC connected to the LAN.
- Patch a switch port to a new cable run.
- Connect a CAT 5 straight-through cable from the wall outlet to the LAN port on the IP telephone.
• Share the existing cable and complete the following steps:
- Unplug the cable from the PC network card (NIC).
- Connect that 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.
S 3 PROVIDING POWER
ECTION
IP telephones require power to function. This can be provided by PoE only.
3.1 Power Over Ethernet (PoE)
A PoE switch provides power over the spare pairs. The switch can be used with any device (not just IP
phones) and detects whether or not power is required. As all phones receive their power from one
device, it is easy to protect the IP phones from loss of power (by connecting the PoE switch to a UPS).
S 4 PEER-TO-PEER
ECTION
An IP telephone can send and receive RTP packets to or from another IP telephone without using
DSP resources on a VoIPDB. This operation supports only Intercom calls between the IP telephones.
If a 8IPLD IP multiline telephone or trunk line is required, a DSP resource is needed and a VoIPDB
must be installed. If a conference call is initiated while on a peer-to-peer call, the peer-to-peer
connection is released and a new non peer-to-peer connection is created using the VoIPDB. If the
third party drops out of the conversation, the call reverts to a peer-to-peer call. There is silence while
this conversion is made by the system.
Although the peer-to-peer feature is supported for IP Station-to-IP Station calls, the NEC SL2100
Chassis must still have a registered VoIPDB installed in the system.
Networking Manual
Therminal
PC Connection
Straight-Thru
Cable

Figure 9-2 Typical Network IP Connection

Ethernet
Straight-Thru
IP7[ ]-4KSU-C1 Chassis
Cable
LAN
CPU
IP7WW-VOIPDB-C1
SL2100
9-3