Specifications

Glossary
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RAD – Recorded Announcement Device.
RAID – Redundant Array of Independent Disks. Array of hard drives on which the information
is duplicated. A controller manages the disks, switching automatically from the primary to the
secondary in the event of the failure of the primary hard drive.
RDN – Remote Directory Number. The Remote DN Table is used to identify alternate ICPs
to check for availability of devices, and to determine if a device is located on the Primary or
Secondary ICP.
RFC – Request For Comments. A document that is created, maintained and distributed by
the Internet Engineering Task Force. An RFC is the vehicle that is used to discuss and evolve
a networking related protocol. RFCs usually get approved and issued as standards.
RFP – Radio Fixed Parts. The Radio Fixed Parts (RFPs) connect to the 3300 ICP through the
LAN. The wireless phones communicate with the RFPs using standard Digital Enhanced
Cordless Telecommunications (DECT) protocol.
RGP – Router Gateway Protocol. A means whereby routers on a common subnet can
communicate with and identify each other. Useful when ICMP Re-direct is needed to identify
an alternative path.
RIP – Routing Information Protocol. A networking protocol that maintains a database of
network hosts and routers and exchanges information about the topology of the network.
RSTP – Rapid Spanning Tree Protocol. A version of STP that will converge networks more
rapidly than STP (see STP).
RTC – Real Time Complex. This is the control block within an ICP. This includes Call Control
and internal controls for the unit.
RTP – Real Time Protocol. Protocol used to identify sequence of voice packets with timing
information before being sent to a user via UDP.
SAC – Switch Application Communications
SET – System Engineering Tool. Used for calculating system parameters, limits and allowable
additions.
SIP – Session Initiation Protocol. An IETF standard for signalling over IP.
SME – Small to Medium Enterprise. A small- to medium-sized business.
Static IP – An IP address that has been manually assigned and fixed. Typically, static addresses
are exceptions within DHCP.
STP – Spanning Tree Protocol. A means whereby the network can determine multiple paths
between two points and disconnect them to leave a single path, removing broadcast issues.