NEC Aspire Manual page 31

IP Interface Cards
4 CH VoIP Media Gateway (4VOIPU-S) — P/N 0891054
The 4VOIPU PCB is used for converting the RTP (Real Time Transfer Proto-
col) packets via the IP network and PCM highway. The IP telephones are
connected directly to the IP bus. When IP phones need to be connected to a
conventional PCM-based digital circuit, this PCB converts the IP packet sig-
nal into a PCM signal format and connects to the PCM time division switch.
The VOIPU PCB is required in order for IP telephones to communicate with
non-VoIP Aspire phones, as well as to place or receive outside calls.
The 4VOIPU PCB provides:
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A maximum of 3 PCBs per system are allowed. This provides 12 channels per system with the
4VOIPU (with the 4VOIPDB, 24 channels are available).
The separate software hub should be a 100Base/full duplex hub. To avoid network problems and to
ensure good voice quality, do not use a Repeater Hub/10Base.
The Aspire VoIP supports H.323, H.325, and H.245 trunks and compressions of G.711, G.723.1,
and G.729.
Product Description
An ENTU PCB is required when a VoIP PCB is installed. If the
ENTU is not installed, the system will not start up.
4VOIPU PCB provides up to 4 channels
Connector for the 4VOIPDB daughter board (providing an additional 4 channels)
1 PCB status LED
DB status LED
RIP session status LED
PCMCIA slot LED
Reset switch
Load switch
Boot jumper
1 run/block switch
Section 2: Components
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