
208 Glossary
P0609327 02
network diagram
This is a physical drawing/description of how the local network works to which your
Business Communications Manager will be connected. It also includes information about
the Business Communications Manager requirements, such as public and/or private IP
addressing, DHCP requirements, and quality of service availabilities. Where possible, it
should include information about the public networks and any changes or adjustments
required by the network or the Business Communications Manager for compatibility.
Nortel NetVision Phone Administrator (NVPA)
This is the Business Communications Manager-specific application that is used to
configure features and system information into the NetVision handsets. This application is
included on the Business Communications Manager database. The latest application can
be obtained at: http://www.symbol.com/services/downloads/nvfirmware2.html
. The serial
cable required to update the programming of the handset can be purchased from Purchased
from Symbol at <http://symbol.com> (part number: 25-20528-01).
packet
Group of bits transmitted as a complete package on a packet switched network.
packet switched network (PSTN)
A telecommunications network based on packet switching technology. A link is busy for
the duration of the packets.
Ping
This utility is used to echo messages to a host over an IP network. This allows you to find
out if the other point is available. Ping also can include statistics about how long it took
from end to end, which provides information about routing.
prioritization
This refers to how a voice data packet is set up in the Business Communications Manager
so that external routers recognize it as having a high priority, thus shortening delay times
and increasing the perception of voice quality over VoIP trunks.
published IP address
The IP address that both the IP telephones and the Symbol NetVision telephones use to
access the Business Communications Manager. NetVision uses the H.323+ RAS protocol.
QoS (quality of service) routing
To minimize voice jitter over low bandwidth connections, the Business Communications
Manager programming assigns specific DiffServ Marking in the IPv4 header of the data
packets sent from IP telephones. During the packet journey through the network, including
any routers on that network, the header specifies a level of priority service. This is quality
of service routing. For QoS to be successful for IP telephony, it must be end-to-end on the
network.
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