NEC NEAX NDA-24349 - Manual (Page 265)

Chapter 13 Voice Over IP (VoIP)
NEAX 2000 IPS Request for Proposal (RFP) Reference Guide Page 13- 7
NDA-24349, Issue 4
5. The IP-PAD is required for connections between IP terminals and legacy stations/trunks. The IP-PAD
converts voice packet data to PCM signals. The number of IP-PADs depends on the traffic volume of
those connections. Up to eight IP-PADs can be accommodated per system, thus providing 256 PCM
channels in total. Up to two IP-PADs can be controlled by the MP without FP cards, and additional IP-
PADs can be controlled by the FP cards (two IP-PADs per FP card).
ƒ 8IPLA/24IPLA
PN-8IPLA card provides 8 channels of IP-PAD with VCT function per card. Adding PZ-24IPLA
daughter-card on the 8IPLA card provides up to 32 channels of IP-PAD with VCT function.
Maximum of 8 IP-PAD cards can be accommodated per system, thus providing 256 PCM
channels in total. By system data setting, the used ports for IP-PAD can be changed to
8/16/24/32 ports. After changing the data, the IP-PAD reset is required.
Note: Up to 24 channels of IP-PAD are provided when using G.723.1 codec.
6. The following types of connections are available on a peer-to-peer basis:
ƒ Connections between IP terminals
ƒ Connections for CCIS networking via IP from/to IP terminals
(Distant systems must be 2000 IPS or 2400 IPX)
7. The IP-PADs are required for the following connections/statuses:
ƒ Connections between IP terminals and legacy stations/trunks
ƒ Connections between IP terminals and IP trunks (H.323)
ƒ Connections for CCIS networking via IP from/to legacy stations/trunks
ƒ While IP terminals are on hold (Consultation Hold, Call Transfer, Music-on-Hold, etc.)
ƒ When any override service is activated (Executive Override, etc.) including IP terminals.
ƒ Three/four-party conference including IP terminals
8. Voice compression is available for following connections.
ƒ Connections between IP terminals
ƒ Connections via IP-PAD (for CCIS networking via IP from/to legacy stations/trunks)
ƒ Voice compression can be assigned on a call basis or terminal basis, by system programming.
ƒ The following type of voice compression is available:
G.711 (64 kbps)
G.729a (8 kbps)
G.723.1 (5.3 kbps/6.3 kbps)
9. The Device Registration Server (DRS) is built into the MP card (System-based DRS). The System-
based DRS can provide log-in/log-out function and registration authorization function of IP terminals.
Up to 952 IP terminals can be managed by the System-based DRS.
10. Payload size of voice packet can be assigned from 10 milliseconds to 40 milliseconds in 10
milliseconds increments by system programming. However, available payload size depends on the
type of voice codec.
Payload Size
Codec Type
Available Range Default Value
G.711 10 milliseconds to 40 milliseconds 40 milliseconds
G.729a 10 milliseconds to 40 milliseconds 40 milliseconds
G.723.1 30 milliseconds (fixed) 30 milliseconds