Voip (Voipu-S) Pcb (Figure 2-15) - NEC Aspire S Manual

Section 2: PCB Installation and Startup

VoIP (VOIPU-S) PCB (Figure 2-15)

The 4VOIPU-S PCB is used for converting the RTP (Real Time Transfer Protocol) packets via the IP net-
work 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 VOIPU-S 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-S PCB provides:
● 4VOIPU-S PCB provides up to 4 channels
● Connector for the 4VOIPDB-S 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
A maximum of 3 PCBs per system are allowed. This provides 12 channels per system with the 4VOIPU
(with the 4VOIPDB-S, 24 channels are available).
Add the VoIP PCB after all other PCBs have been installed and the ports assigned. Otherwise, port number-
ing may be off as the VoIP PCB is recognized first (even before the ports on the CPU). This would mean the
VoIP is assigned ports 1-4 and the digital and analog ports on the CPU would then follow.
When installing a VoIP PCB, the 4VOIPU-S PCB uses a consecutive block of 4 trunk ports if there are 4
vacant 4 ports available. The 4VOIPU-S with a 4VOIPDB-S PCB uses a consecutive block of 8 trunk ports
if there are 8 ports available. If there are not enough trunk ports available, the VOIPU will start up without
allocating any trunk ports.
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. A maximum of 16 IP extensions
or 8 IP trunks are possible with the Aspire S. The VoIP PCB can be plugged into any universal slot.
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.
2-34 ◆ Section 2: PCB Installation and Startup
An ENTU-S PCB is required when a VoIP PCB is installed. If the ENTU-S is not installed, the
system will not start up.
Aspire S Hardware Manual