Nortel BCM 3.7, Manual

Page: 923 / 1004

Q 923
Programming Operations Guide
pulse/tone dialing
An external line setting for pulse or tone dialing. Pulse is the traditional method of dialing
used by rotary-dial or push-button single-line telephones. Tone dialing allows telephones
to communicate with other devices such as answering machines. You require tone dialing
to access the features that PBX systems can provide or to use another system remotely.
PVC
The Permanent Virtual Circuit (PVC) is an end-to-end virtual connection in frame relay
networks.
Q
QoS
On the Internet and in other networks, Quality of Service (QoS) refers to guaranteed
throughput level. QoS allows a server to measure, improve and, to some level, guarantee
the transmission rates, error rates, and other data transmission characteristics. QoS is
critical for the continuous and real-time transmission of video and multimedia information
which use high bandwidth.
QSIG
Q reference point signaling. QSIG is an ETSI (International) standard signaling for
multi-vendor peer-to-peer communications between PBXs and/or central offices.
Quality of Service
See QoS.
R
RAM (Random Access Memory)
Computer memory that stores data temporarily. RAM stores the data used by the
microprocessor as it executes instructions. The contents of RAM are erased when you
restart or turn off the Business Communications Manager base unit.
RAS
The Remote Access Server (RAS) is the ability to get access to a computer or a network
from a remote distance. In corporations, people at branch offices, telecommuters, and
people who are travelling may need access to the corporate network. Home users get
access to the Internet through remote access to an Internet service provider (ISP).
A remote access server is the computer and associated software that is set up to handle
users seeking access to the network remotely. Sometimes called a communication server, a
remote access server usually includes or is associated with a firewall server to ensure
security and a router that can forward the remote access request to another part of the
corporate network.