Glossary-30
stop bit
The last bit in asynchronous transmission, used to indicate the end of a
character.
strapping
A hardwire method used to configure an Integration unit module.
STX, start of text
A control character used to indicate the beginning of a message.
sub T1
A term used generically for any data or voice equipment operating at rates
below 1.544 Mbps. Generally this covers equipment operating at 9.6 Kbps to
512 Kbps; i.e., voice grade lines, Dataphone Digital Services (DDS) lines and
Fractional T1 lines.
switch group
A group of switches encased in a block mounted on a printed circuit board. It
is also called dip switch or configuration switch group.
switched traffic
Data which passes through the node. The traffic is neither originated nor
answered at the node. Contrast with terminated traffic.
switching
Selective interconnection of ports of a like kind on request on local and/or
remote nodes. Async and voice/fax ports can be switched; sync ports cannot.
Contrast with force connect(ed).
SYN, synchronous idle
In synchronous transmission, a control character used to maintain
synchronization and as a time fill in the absence of data.
sync
Short for synchronous that describes the method of transmitting data.
See
synchronous transmission.
synchronous transmission
Transmission in which the data characters and bits are transmitted at a fixed
rate with the transmitter and receiver synchronized. This eliminates the
need for the start and stop bits that are used in asynchronous transmission.
