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AOC: See under ISDN Services.
AT-command: Attention
This is the command system in ISDN adapters and s. AT is an abbreviation of
attention. Nearly all commands begins with AT. For instance if you want to dial the
number: 5555, the AT command is ATD5555.
BACP/BAP: Bandwidth Allocation Protocol
This protocol is a way to control the closing and opening of the two B-channels on the adapter during bundling.
BRI: Basic Rate Interface (In some countries called ISDN2)
This type of ISDN consists of two B-channels and one D-channel. The B-channels are used for transferring packages. The D-channel is for instance used when the adapter and the central office is communicating.
CCBS: See under ISDN Services.
CFB: See under ISDN Services.
CFNR: See under ISDN Services.
CFU: See under ISDN Services.
CH: See under ISDN Services.
CLIP: See under ISDN Services.
CLIR: See under ISDN Services.
CW: See under ISDN Services.
DTR: Data Terminal Ready
A signal that indicates that the computer is ready to communicate with the ISDN-adapter.
HDLC: High Level Data Link Control
This is a standard for how data can be transmitted at the B-channel.
IP: Internet Protocol
This term is the protocol for transferring a package over the internet.
ISDN: Integrated Service Digital Network
This is the concept of ISDN, which is an integration of fax, telephony and data communication.
ISDN Services:
AOC: Advice Of Charge
Charging information at the end of a call (AOC-E): When a calling user terminates a call and provided the AOC-E supplementary service has been requested, the calling user will receive information about the total charge for the call.
CCBS: Completion of Call to Busy Subscriber
If a calling user makes a call, and the called user is busy, the calling user can activate the CCBS supplementary service. The network will start monitoring the called user. When the called user becomes idle again, the network will alert the calling user who can then decide either to make a new call attempt or simply ignore the alert.
CFB: Call Forwarding Busy
CFNR: Call Forwarding No Reply
CFU: Call Forwarding Unconditional
CH: Call Hold (HOLD)
Gives the possibility to put a call on hold and thereby reserve a B-channel and use it for
a new outgoing or incoming call. When appropriate, the held call may be retrieved.
CLIP: Calling Line Identification Presentation
This means that you can identify the number that makes a call to your adapter.
CLIR: Connected Line Identification Restriction
Gives the calling user the possibility of preventing that his ISDN-number and
subadress, if available, are presented to the called user.
CW: Call Waiting
During an active call, a user may receive indication about a new incoming call, and may accept this call alternatively, the user may reject or ignore the incoming call.
MSN: Multiple Subscriber Number
You can get more than one phone number for your ISDN connection. For instance, the fax or the computer can have their own numbers.
MWI: Message Waiting Indication
An ISDN service from your telephone company or ISP informing about messages.
TP: Terminal Portability
During an active call, the call may be transferred to another terminal, or the terminal may be physically moved to another ISDN-connector on the same S-Bus.
This service is related to the called or calling user.
SUB: Subadressing
The calling user may, in addition to the called userīs ISDN-number, include the called userīs subadress in the call request. This subadress will be transported transparently through the network an will be delivered to the called user.
UUS: User to User Signaling
During establishment and clearing of a call, users may exchange user-to-user information included included in signalling messages used for call control. UUS can be requested either simplicity (by the precense of user-to-user information) or explicitly (by the means of a specific request). 128 octets can, as a maximum, be included in each signalling message.
3PTY: Three-Party Service
If a user already has established a call to another user, he can put this call on hold and make a new call to a third user by making use of the HOLD supplementary service. By invoking the 3-PTY supplementary service the user can join all tree users together in a three-way conference. During this conference, the user can decide to "isolate" either of the two other users in order to talk privately with the other user.
ISDN2: Refers to BRI
MLP: MultiLink Protocol
In this protocol two B-channels are connected to improve the capacity of the adapter. The two B-channels are open constantly.
MSN: See under ISDN Services
MWI: See under ISDN Services
POTS Plain Old Telephone System
A widespread term used for ordinary analog telephony.
PSTN: Public Switch Telephone Network
The term refers to the public analogue telephone network.
REN: Ringer Equivalence Number
The number of standard telephone the A/B interfaces can support.
RFC: Request For Comments
RFC is a standard for communication on the Internet, determined by the "Internet Engineering Task Force". For instance the standards BAP/BACP is RFC 2125.
SLIP: Serial Line Internet Protocol
Old standard for dial up networking. Today, PPP is normally used.
SUB: See under ISDN Services
TCP: Transmission Control Protocol
Used to control data packages on the Internet For instance TCP controls the order of the packages and it carries out error correction.
TCP/IP: Refers TCP and IP
TP: See under ISDN Services.
USB: The Universal Serial Bus (USB) is a new and easier way of connecting peripherals to your personal computer. In addition to traditional RS-232 serial ports / COM-Port, your computer is equipped with a USB port to which you connect your . Your computer works as a "host" for USB devices.
UUS: See under ISDN Services.
3PTY: See under ISDN Services.
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