NEC UNIVERGE NEAX 2000 IPS Reference Manual page 246

Chapter 13 Voice Over IP (VoIP)
Peer-to Peer Connections between IP Enabled Dterm
The IP stations can communicate with other IP stations over the LAN, on a peer-to-peer connection
basis. Call control is provided by the Main Processor (MP) with Ethernet adapter card, and voice
packets are transmitted between IP stations over the LAN (not through Time Division Switch). Voice
compression of G.729a (8 kbps) and G.723.1 (5.3 kbps/6.3 kbps) is available for its connections.
Peer-to-Peer Connections over CCIS Networking via IP
The IP stations can communicate with other 2000 IPS/2400 IPX systems over the CCIS networking via
IP, on a peer-to-peer connection basis. MP controls a connection between the IP station and IP trunk
built into the MP. The built-in IP trunk communicates with IP trunks of the distant systems (2000
IPS/2400 IPX) over CCIS networks via IP. Voice packets are transmitted over the LAN and WAN (via
router). Voice compression of G.729a (8 kbps) and G.723.1 (5.3 kbps/6.3 kbps) is available for its
connections.
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