Information Technology Reference
In-Depth Information
Real-Time Transport Protocol (RTP)
The UDP-based protocol responsible for transport-
ing audio packets; uses random, even-numbered UDP ports from 16,384 to 32,767 for com-
munication.
resource
May be an administrative web page, part of a web page, or a tool or interface
within an application.
robbed bit signaling (RBS)
An implementation of channel associated signaling (CAS) that
steals the eighth bit of every sixth frame of a digital T1 circuit for signaling information.
role (CUCM)
Defines a set of privileges to an application's resources. Privileges may be
defined as No Access, Read, or Update.
router-on-a-stick
An inter-VLAN routing configuration that allows a single router to move
data between VLANs by using a FastEthernet or greater interface broken into subinterfaces
connected to a switch trunk port.
service engine
The interface that is created on Cisco Unified CME after the Cisco Unity
Express hardware platform is installed and recognized by the router. CME will route calls
through this interface to the service module for Cisco Unity Express to process.
service module
The internal interface of Cisco Unity Express. Cisco Unity Express routes
calls through this interface to the service engine for Cisco Unified CME to process.
Session Initiation Protocol (SIP)
Voice-signaling protocol created by the IETF as a light-
weight alternative to H.323.
Signaling System 7 (SS7)
The protocol used within the telephony service provider net-
work to provide inter-CO communication and call routing.
Single Number Reach
A feature that allows users to have incoming calls ring another, pre-
configured number after a defined time limit. Single number reach also allows for mobility,
which allows the transfer of an active call to or from the same, preconfigured number.
SIP for Instant Messaging and Presence Leveraging (SIMPLE)
Used for IM with
third-party systems.
Skinny Client Control Protocol (SCCP)
Cisco-proprietary voice-signaling protocol used
to control Cisco IP phones.
smartports
A CCA macro that aids in the configuration of roles for individual ports.
Spanning Tree Protocol (STP)
A method designed to prevent loops in switched networks
due to redundant inter-switch connections.
super frame (SF)
An early T1 signaling method that sent 12 T1 frames at a time.
Survivable Remote Site Telephony (SRST)
A configuration that allows a router to act as
a failover device if an IP phone is unable to reach a Cisco Unified Communications Manager
server.
switched virtual interface (SVI)
A routed interface on a switch.
