18 Terms
and
Definitions
Term or Definition
Meaning
Dejitter Buffer
To compensate variable network delays, SmartWare includes
a dejitter buffer. Storing packets in a dejitter buffer before
they are transferred to the local ISDN equipment, e.g.
telephone, SmartWare converts a variable delay into a fixed
delay, giving voice a better quality. See also Jitter.
Digit Collection
SmartWare supports overlap dialing. Some of the connected
devices (PBX, ISDN network, remote gateways and
gatekeepers) may however require bloc sending of the dialed
number. SmartWare collects the overlap dialed digits and
forwards them in a single call setup message
Driver Software Download
A driver software image is downloaded from a remote TFTP
server to the persistent memory (
flash:
) of a SmartNode.
Driver Software Image
The software used for peripheral chips on the main board
and optional PMC interface cards is stored in the persistent
memory (
flash:
) of a SmartNode.
DTMF Relay
DTMF relay solves the problem of DTMF distortion by
transporting DTMF tones over low-bit-rate codecs out-of-
band or separate from the encoded voice stream
Echo Canceller
Some voice devices unfortunately have got an echo on their
wire. Echo cancellation provides near-end echo
compensation for this device.
Factory Configuration
The factory configuration (factory-config) represents the
system default settings and is stored in the persistent
memory (
nvram:
) of a SmartNode.
Fast Connect
A “normal” call setup with H.323 requires several TCP
segments to be transmitted, because various parameters are
negotiated. Since a normal call setup is often too slow, fast
connect is a new method of call setup that bypasses some
usual steps in order to make it faster.
Flash Memory
Persistent memory section of a SmartNode containing the
Application Image, Bootloader Image and the driver
software Image.
flash:
A region in the persistent memory of a SmartNode. See also
flash memory.
Gatekeeper Gatekeepers
manage
H.323 zones, which are logical
collections of devices such as all H.323 devices within an IP
subnet. For example gatekeepers provide address translation
(routing) for the devices in their zone.
Gateway
In SmartWare terminology a
gateway
refers to a special
purpose component that connects two contexts of different
types, for example the CS and the IP context. It handles
connections between different technologies or protocols.
SmartWare includes an H.323 and ISoIP gateway.
Software Configuration Guide Release 2.10, Revision 1.00
Summary of Contents for SmartWare Release 2.10
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Page 15: ...Terms and Definitions 15 Software Configuration Guide Release 2 10 Revision 1 00...
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