SHA1
Secure Hash Algorithm version 1 (SHA1) is a hash function that
generates a 160 bit hash value (checksum). See also Hash.
SHDSL
Symmetrical High-bit-rate Digital Subscriber Line. See DSL.
Shell
The shell is an input interface (e. g. command line or graphic user
interface) between computer and user.
Short hold
The short hold is the defined amount of time after which a network
connection is automatically cleared if no more data is transmitted.
SIF
With a Stateful Inspection Firewall (SIF), the routing of a data packet
is not determined only by source and destination addresses but also
using dynamic packet filtering based on the connection status.
Simplex operation
Simplex operation is a performance feature. Simplex operations are
used to take a call automatically and switch the speaker function on.
If the called party lifts the receiver, a normal voice connection is es-
tablished.
Single phone num-
ber (VoIP)
Single phone number access is a VoIP connection that is also
known as a point-to-multipoint connection. It is used to connect VoIP
terminals. Multiple subscriber numbers (MSNs) are provided. See
also Direct dial-in (VoIP)
SIP
The Session Initiation Protocol is a network protocol for setting up a
communication session between two or more subscribers. The pro-
tocol is used for IP telephony (VoIP).
SIP provider
A SIP provider does the switching between a SIP connection and
other analogue, ISDN and VoIP connections.
SMTP
The Simple Mail Transfer Protocol (SMTP) is used to exchange
emails.
SNMP
The Simple Network Management Protocol (SNMP) is used to con-
figure, control and monitor different network components (e. g.
routers, servers, etc.) from a single, central system. The network
component settings that can be changed are stored in a database –
the Management Information Base (MIB). SNMP uses UDP. The
network component receives requests to port 161 while the man-
aging system receives confirmation messages (TRAPs) at port 162.
SNTP
The Simple Network Time Protocol (SNTP) is used to transmit the
time and to synchronise the server and client.
Softkey
A softkey refers to a key whose function is determined by the asso-
bintec elmeg GmbH
Glossary
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