Help Point Implementing a VoIP System0 pages

VoIP Telephony
Implementing a Help Point System using
GAI-Tronics VoIP Products

General Description
GAI-Tronics VoIP products incorporate a number of features designed to deliver a high-quality, resilient system across an
IP network. This document highlights those features particularly important for implementing a Help Point or Emergency Call
Point system. Full specifications and configuration options are contained in the installation guide and configuration guide.
Physical and Environmental properties
In common with most GAI-Tronics products, VoIP Help Points are designed to be rugged, vandal resistant, weather
resistant to IP65, and have an operating temperature range of -20°C to + 60°C, making them perfectly suited
for public use in internal and external locations.
System Approach - design for resilience / open protocols
In the GAI-Tronics approach there does not have be a single Help Point Server. Rather than a single monolithic device,
a number of discrete servers are used to provide the services required for the Help Points to operate. “Server” in this
instance implies a software entity rather than a physical machine; the required server can be anywhere on the IP network
This approach delivers 2 key benefits:
•t Ease of integration, by using standard open protocols.
•t Resilience, by using multiple redundant servers
Open protocols
None of the servers of protocols used by GAI-Tronics Help Points is proprietary or in any way bespoke to GAI-Tronics. Central
to this is SIP (Session Initiation Protocol, RFC3261) which has been widely adopted as the preferred protocol for VoIP. Using
standard components and open protocols means that Help Points can often be integrated into an existing VoIP system with no
additional equipment, with a subsequent reduction in maintenance, support, technical training and the other often hidden costs
of maintaining additional equipment on a network. Using a standard SIP server can make PABX-style features such as call
diversion, call forwarding, conferencing and call recording available to Help Points.
The servers that a GAI-Tronics VoIP Help Point can use are:
•t SIP proxy - to route calls
•t SIP registrar (frequently combined with the proxy server)- to resolve URls to IP addresses
•t DNS - to resolve domain names to IP addresses
•t Syslog (over TCP) - for reporting alarms and external inputs
•t SMTP - for reporting alarms via email

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