NEC SL1100, Networking Manual

Page: 95 / 292

Networking Manual 7 - 1
7
SIP T
runk
ing
SIP Trunking
S
ECTION
1
V
O
IP
VoIP (Voice over Internet Protocol or Voice over IP) allows the delivery of
voice information using the Internet protocol (sending data over the
Internet using an IP address). This means that digital voice information
can be sent in packets over the Internet rather than using the traditional
public switch telephone network (CO lines). A major advantage of VoIP is
that it avoids the tolls charged by ordinary telephone service.
Using VoIP equipment at a gateway (a network point that acts as an
entrance to another network), the packetized voice transmissions from
users in the company are received and routed to other parts of the
company intranet (local area or wide area network) or they can be sent
over the Internet using CO lines to another gateway.
1
S
ECTION
2
IP N
ETWORKING
IP Networking uses VoIP technology to connect two or more telephone
systems together. This allows calls to be made between sites without
using the public telephone network. This can save money and make
communication between sites much easier.
The following Networking modes are available on the NEC SL1100
system:

SIP TIE lines

SIP Trunks (to a SIP Trunk Provider)
1. The voice quality of VoIP depends on variables such as available bandwidth, network latency and
Quality of Service (QoS) initiatives, all of which are controlled by the network and Internet Service
Providers. Because these variables are not in NEC control, it cannot guarantee the performance of the
user’s IP-based remote voice solution. Therefore, NEC recommends connecting VoIP equipment
through a local area network using a Private IP address.