NEC NEAX 2000 IPS Reference Manual page 275

Chapter 13 Voice Over IP (VoIP)
Service Conditions (IP CCIS via IP Trunk cards)
1. Maximum voice channels per IP trunk card depends on the payload period as follows (payload
period can be assigned in system programming):
Payload Period
10 ms
20 ms
30 ms
40 ms
2. Maximum 127 voice channels can be provided per system (point-to-multipoint connection).
3. IP trunk cards must be connected with the intranet via router.
IP Trunk Card Specifications
Description
QoS signaling
Speech encoding/decoding
Payload period
FAX communications protocol
FAX mode detection timer
PAD control
Tandem connection
IPT connection mode
Dynamic jitter buffer
Required Equipment for IP CCIS via IP Trunk cards
Equipment Name
SPN-IPTB-A
PN-IPT
SPN-4VCTI-A
W/Cable
NEAX 2000 IPS Request for Proposal (RFP) Reference Guide
NDA-24349, Issue 4
Maximum Voice Channels per IP Trunk
Specifications
IP Precedence/Diffserv
G.711/G.729a/G.723.1
G.711/G.729a : 20 ms, 30 ms, 40 ms
G.723.1 : 30 ms (fixed)
T.30
0 to 5 min. (1 min. increment)
Controlled in a node basis
IPT to IPT/IPT to ACIS: available (but voice quality may deteriorate)
IPT to ISDN : available
Fixed Connection Mode or Automatic Disconnect Mode can be
assigned per IPT trunk or destination node in system programming.
10 to 600 ms (10 ms increment)
Functional Name
IPT
VCT
4
8
16
16
IP Trunk Card Accommodates the IP network and
transmits/receives compressed voice or signals over IP
network. 10 BASE-T/100 BASE-TX twisted pair cable is
connected directly to this card.
4-channel CODEC Card for IP Trunk (max of four per IPTB)
Voice compression protocols:
G723.1, G729A, G711, FAX (14.4 kbps),DTMF signals
Used together with PN-IPTB card.
Function
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