NEC Aspire Manual page 210

Section 3: Features
Description
1. The voice quality of VoIP is dependent 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's control, it cannot guarantee the performance of the user's IP-based remote voice solu-
tion. Therefore, NEC recommends connecting VoIP equipment through a local area network using a Private IP
address.
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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 voice
information, in a digital form, can be sent in packets over the Internet rather than using the tradi-
tional public switch telephone network (CO lines). A major advantage of VoIP and Internet tele-
phony 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 within the company are received and routed to other
parts of the company's intranet (local area or wide area network) or they can be sent over the Inter-
net using CO lines to another gateway.
The Aspire VoIP supports H.323, H.325, and H.245 trunks and compressions of G.711, G.723.1,
and G.729.
Note: The Aspire IP phones are not IEEE 802.3af compliant unless an ILPA adapter is used for
PoE. The ILPA, however, cannot be used on the Uniden H.323 telephones. Refer to the ILPA
Adapter Instructions, P/N 0893109 for details.
Program Available for Gain Setup of VOIPU PCB
The system software provides an option to adjust the gain setting for the VOIPU PCB.
Calling Party Number Setup for Trunks and Extensions
The system provides two programs which allow the programmed entry of the Calling Party Num-
ber. These entries determine the information displayed when VoIP trunks and extensions are used.
Using LANs
Using a LAN setup (local area network) with the Aspire system complies with the ethernet standard
(10Base-T/100Base-TX).
To connect a telephone to a LAN connection, the system allows the use of an Aspire digital IP 34-
button keyset (referred to as Aspire IPhone), an Aspire digital keyset with an IP Adapter installed or
an H.323 IP digital telephone. For details on installing the IP Adapter, refer to the Aspire Hardware
Manual (P/N 0893100).
If connecting a LAN to a WAN (wide area network), follow the instructions included with the
ADSL modem or gateway device.
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Product Description