S0 connection
An internal or external S0 port provides two voice channels and one data channel for use; an external S0 port can be used as a Point-to-Point connection or as a Point-to-Multipoint connection
screen sharing
The transfer of a computer's screen contents to one or more other computers
self-labelling function keys
The contents of a display beside a function key change, as driven by the software, for example with the COMfortel D-XT20i extension module
setup service
Service offered by Auerswald to support the configuration of selected ICT systems; purchase of the corresponding voucher is required
Data transfer protocol with encryption
simultaneous call connections
Multiple active connections managed by "call hold", "brokering", "conference" or "waiting queues"
simultaneous incoming calls
Multiple incoming calls to one subscriber, for active calls, the second call is signalled by "call waiting"
The Session Initiation Protocol is a network protocol used to set up, control and end a communication session between two or more subscribers
SIP account
The SIP account or SIP identity are the personal user data used to access the VoIP provider's infrastructure or the infrastructure of the IP-based ICT system; the subscriber can call or be called via the account
Busy lamp field in a VoIP telephone, based on the Session Initiation Protocol
Signalling of a message in voicemail or fax box, based on the Session Initiation Protocol
SIP telephone
Telephone with signalling and audio transmission using the Session Initiation Protocol (SIP)
SIP trunk
Using a SIP trunk, several transmission channels and telephone numbers can be managed at once, on one access account, e.g. to enable direct extensions to be set up on IP systems, comparable to a PBX or Primary Multiplex Interface
Session Initiation Protocol Secure is used to encrypt signalling data with TLS and transmit it
soft client
A programme that uses the services of a server, e.g. a softphone
Soft PBX
Stand-alone communications software for business use
Soft PBX solution
Software-based ICT system consisting of software and alternative hardware platforms
Computer programme for making telephone calls over land lines or the Internet; a headset, for example, can be used as the hardware to operate the programme
software based
The use of software to implement technical functions
software centric
The use of software-based techniques to define the architecture of systems and implement them
software licence
The purchased right to use a piece of software
software release
Version status of a software
software security update
The updating of software security features
software update
The updating of software to a newer version
speed-dial key
Frequently called telephone numbers can assigned to a specific button on the telephone
Under SRTP (the Secure Real-Time Transport Protocol), data is encrypted and then transmitted
Encryption protocol for secure data transfer in the Internet (previous designation for what today is called TLS)
standby time
On mobile devices: the maximum recording time they can be switched on, with a radio connection to the base unit (without an active call connection), until the device battery goes flat
static IP address
Manually assigned permanent IP address for a network device connected to the router
status signalling
The statuses of a function or switching device are indicated visually by, for example, multi-coloured LEDs
subscriber key
A direct call key in a telephone or key extension module that has been permanently assigned to a subscriber
system connection
Connection of a technical device to the surrounding infrastructure
system telephone
Telephone with additional convenience and special functions that supports special features of the connected ICT system