System requirements and limitations – GAI-Tronics 397-700CB RED ALERT VoIP Retro-fit Telephones User Manual
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Model Description
398-702RT Ramtel Flush-Mount VoIP Telephone, weatherproof brushed stainless steel front panel,
HELP
autodial push button,
CALL
(off-hook) button, 12-button Braille keypad, and
CALL
RECEIVED
WHEN
LIT
LED.
Code Blue is a registered trademark of Code Blue Corporation.
Talk-A-Phone is a registered trademark of Talk-A-Phone Co.
Ramtel is a registered trademark of Ramtel Corporation.
System Requirements and Limitations
The VoIP Telephones require Power-over-Ethernet or a local 24–48 V dc power source for operation.
Two VoIP telephones can be connected in a peer-to-peer configuration without the need for a LAN.
However, a 10/100 BaseT Ethernet with SIP server is required for systems containing three or more VoIP
Telephones. Conferences are limited by the customer’s LAN media capabilities and the services
available at each end point.
In addition to direct point-to-point dialing (peer-to-peer), directly or via a SIP server, each telephone is
capable of receiving a Multicast broadcast. Multicast allows a single audio stream to be sent to multiple
end points simultaneously, to achieve multi-point paging or Public Address functionality over IP.
Multicast requires the use of a SIP server that specifically supports Multicast functionality and each
telephone must be configured (enabled) to receive Multicast packets.