NEC NEAX 2000 IPS Reference Manual page 38

Chapter 2 System Architecture
SN716 Attendant Console
The SN716 Attendant Console connection is available through one twisted-pair cable when using an
AC adapter. When using the PN-PW00, one twisted-pair cable is required for voice/data and one pair
is required for power from the PW00 to the Console.
Analog/Digital Telephones
.
The analog/digital telephone connection is available through one twisted-pair cable
IP Telephones
The IP telephones can communicate with other IP telephones over the LAN, on a peer-to-peer
connection basis. The Main Processor (MP) provides call control with an Ethernet adapter card. Voice
packets are transmitted between IP telephones 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 these connections.
The IP telephones can communicate with legacy stations and trunks (including H.323 trunks) via an IP-
PAD that converts voice packet data to PCM signals. Call control signals are transmitted to the MP over
the LAN, while voice packets are transmitted via the IP-PAD. The number of IP-PADs depends on the
term
traffic volume of connections between the IP Enabled D and legacy stations and trunks.
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