Panasonic KX-NS500 Features Guide

4.1 Public Network Features
4.1.1 SIP (Session Initiation Protocol) Trunk
Description
Through
a V-SIPGW card, the PBX can connect to an Internet telephony service provided by an ITSP (Internet
Telephony Service Provider).
An ITSP provides its telephony service partly through the conventional telephone network (e.g., ISDN and
Mobile), which is fee-based. An ISP (Internet Service Provider), which can also act as a SIP provider, does
not provide the telephone connection itself. However, providing its users with Internet access, an ISP provides
voice communication on the Internet for free. In this way, with VoIP technology based on the SIP protocol, the
cost of voice communication can be much cheaper than conventional telephone networks.
PC
LAN
(Local Area Network)
WAN (Wide Area Network)
Internet
Local
Telephone
IP-PT
ISP
ITSP
Router
Switching
Hub
V-SIPGW
PBX
Conditions
• A subscription with an ISP is required for an Internet connection.
• A subscription with an ITSP is required for a telephone connection. The ISP and ITSP may be part of the
same company.
376 Feature Guide
4.1.1 SIP (Session Initiation Protocol) Trunk

Panasonic KX-NS500 Specifications

General

Analog Extensions	Up to 64
VoIP Support	Yes
System Type	Hybrid IP-PBX
Power Supply	AC 100-240V, 50/60Hz
Operating Temperature	0°C to 40°C
Humidity	10% to 90% (non-condensing)
Maximum Extensions	288
IP Extensions	128
VoIP Channels	64
SIP Trunks	64
Networking	Yes, supports networking
Built-in Applications	Call Center
Expandability	Yes, via expansion cards and cabinets
Supported Protocols	SIP, H.323, MGCP
Dimensions	430 x 88 x 367 mm