NEC Aspire Manual page 56

Section 2: Components
IP Interface Cards
4 CH VoIP Media Gateway (4VOIPU) — P/N 0891042
48
VoIP PCB Installation Note:
When installing a VoIP PCB, the system automatically assigns trunk ports to match the card's port
capacity. For example, a 4VOIPU would take 4 trunk ports, the 4VOIPU with a 4VOIPDB would
take 8 trunk ports. Extension ports are not reserved until an IP phone is connected to the system.
When the Þrst IP phone is plugged in, the system takes the next four consecutive extension ports
available and automatically assigns them as IP ports. The next three IP phones installed will use this
group of ports. When the Þfth IP phone is connected, the next 4 consecutive extension ports avail-
able will be assigned as IP ports.
If the number of trunk ports reserved by the system is a concern, install the trunk cards Þrst, then
install the VOIPU PCB. This will allow the trunks to be assigned to the COIU, DIOPU, etc. Þrst. If
there are not enough trunk ports available for the VoIP PCB, the system will still recognize the card
and allow it to be used for IP phones.
If the PCB is not going to be used for trunks, the logical trunk ports can be set to '0' in Program
10-03-01 : PCB Setup, but the physical trunk ports are still assigned to the PCB and cannot be used
for any other PCB unless the PCB is deleted from the slot in Program 90-05 : Slot Control.
The Aspire VoIP supports H.323, H.325, and H.245 trunks and compressions of G.711, G.723.1,
and G.729.
The 4VoIP PCB is used for converting the RTP (Real Time Transfer Protocol) 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 signal into a PCM signal format and connects to the PCM time division switch.
The 4VOIPU PCB is required in order for IP telephones to communicate with non-VoIP Aspire
phones, as well as to place or receive outside calls. This PCB can be used with either the Basic or
Enhanced version of the NTCPU (P/N's 0891002 and 0891038).
The 4VOIPU PCB provides:
● 4VOIPU PCB provides up to 4 channels
● Connector for the VOIPDB daughter board (providing an additional 4 channels)
● 1 PCB status LED
●
1 run/block switch
A maximum of 16 PCBs per system are allowed, providing 64 channels (with the daughter board,
128 channels) and it can be plugged into any universal slot. The PCB will consume 4 extension
ports and, if available, 4 trunk ports.
If a separate software hub is used (and not the 8SHUBU PCB), it should be a 100Base/full duplex
hub. To avoid network problems and to ensure good voice quality, do not use a Repeater Hub/10Base.
Product Description