NEC UNIVERGE NEAX 2000 IPS Reference Manual page 249

Chapter 13 Voice Over IP (VoIP)
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 channels.
By system data setting, the used ports for IP-PAD can be changed to 8/16/24/32 ports.
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:
Connections between IP terminals
Connections for CCIS networking via IP from/to IP terminals (2000 IPS or 2400 IPX)
7. The IP-PADs are required for the following connections/statuses:
Connections between IP terminals and legacy stations/trunks/IP trunks(H.323)
Connections for CCIS networking via IP from/to legacy stations/trunks
While IP terminals are on hold (Consultation Hold, Call Transfer, Music-on-Hold, etc.)
When any override service is activated (Executive Override, etc.) including IP terminals.
Three/four-party conference including IP terminals
8. Voice compression is available for following connections.
Connections between IP terminals
Connections via IP-PAD (for CCIS networking via IP from/to legacy stations/trunks)
Voice compression can be assigned on a call basis or terminal basis, by system programming.
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 956 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.
Codec Type
G.711
G.729a
G.723.1
11. Maximum number of voice channels per IP-PAD card are as follows:
8IPLA/24IPLA
Payload Size
10 ms
20 ms
30 ms
40 ms
UNIVERGE 2000 IPS Request for Proposal (RFP) Reference Guide
NEAX
Issue 6
Available Range
milliseconds
10 to 40
milliseconds
10 to 40
milliseconds
30
Maximum Voice Channels per IP-PAD Card (8IPLA/24IPLA)
G.711
20
32
32
32
Payload Size
Default Value
milliseconds milliseconds
40
milliseconds milliseconds
40
milliseconds
(fixed) 30
G.729a
20
32
32
32
G.723.1
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24
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