Specifications

Appendix C - Glossary Administration Manual (SIP/MGCP Version)
AT-VP504E FXS 136
Simple Network Time
Protocol (SNTP)
SNTP, which is an adaptation of the Network Time Protocol (NTP), is
widely used to synchronize computer clocks in the global Internet. It
provides comprehensive mechanisms to access national time and
frequency dissemination services, organize the time- synchronization
subnet and adjust the local clock in each participating subnet peer. In
most places of the Internet of today, NTP provides accuracies of 1-50
ms, depending on the characteristics of the synchronization source
and network paths.
Stack A set of network protocol layers that work together. The OSI Reference
Model that defines seven protocol layers is often called a stack, as is
the set of TCP/IP protocols that define communication over the
internet.
The term stack also refers to the actual software that processes the
protocols. So, for example, programmers sometimes talk about loading
a stack, which means to load the software required to use a specific set
of protocols.
Subnet An efficient means of splitting packets into two fields to separate
packets for local destinations from packets for remote destinations in
TCP/IP networks.
T.38 An ITU-T Recommendation for Real-time fax over IP. T.38 addresses
IP fax transmissions for IP-enabled fax devices and fax gateways,
defining the translation of T.30 fax signals and Internet Fax Protocols
(IFP) packets.
Telephony The science of translating sound into electrical signals, transmitting
them, and then converting them back into sound.
Terminal Device capable of sending or receiving data over a data
communications channel.
Transmission Control
Protocol/Internet
Protocol (TCP/IP)
A suite of communications protocols developed by the Department of
Defense in the 1970s that connects hosts on the Internet and provides
the standards for transmitting data over networks.
Trivial File Transfer
Protocol (TFTP)
A simplified version of FTP that transfers files but does not provide
password protection, provide directory capability, or allow transmission
of multiple files with one command.