98Glossary
main office, main office call server
NCS
normal mode
QoS
SIP
steering codes
TPS
UDP
UDP
VoIP trunk
WAN
ZDP
The system that provides telephony services to redirected SRG IP telephones in normal mode.
Network Connection Server
The NCS is an H.323 gatekeeper. It provides standard H.323 gatekeeper functionality, as well as support for branch office and virtual office features.
The operating mode of the SRG when connectivity with the main office is established.
Quality of Service
In IP telephony, QoS refers to the quality of the voice communication channel. There are inherent difficulties associated with transmitting voice over IP and quality of service is a significant challenge for service providers. QoS specifications allow service providers and their customers to establish and monitor acceptable levels of service.
An IP gateway protocol used by both the main office and the SRG to create VoIP trunking connections.
Steering codes are similar to line pool access codes and destination codes. Steering codes determine where a call gets routed.
(Internet Telephone) Terminal Proxy Server
A TPS controls the connection between IP telephones. Uniform Dialing Plan
Each location within the network is assigned a Location Code. On a private network, this code precedes the directory number of the telephone being dialed. Depending on routing configuration, this number may be part of the destination code, or it may automatically be dialed out when the appropriate destination code is dialed before the directory number. Under the Uniform Dialing Plan (UDP), the SRG must include this code in the BUID.
User Datagram Protocol
A member of the TCP/IP protocol suite that transports data as a connectionless protocol, using packet switching. Generally, ports on the SRG support UDP.
Voice over IP trunk
A pathway between two systems that allows voice to be transmitted over an IP connection.
Wide Area Network
A computer network that spans a relatively large geographical area. The largest WAN in existence is the Internet.
Zone Digit Prefix
The main office appends this number to an SRG
