The data of your fax transmission are encoded and compressed for the transmission. The minimum standard is MH (Modified Huffmann). Better encoding methods are MR (Modified Read) or MMR (Modified Modi-
EN fied Read).
Error Correction Mode (ECM)The ECM method reduces transmission errors that result, for example, from bad telephone lines, thereby reducing the duration of transmissions. Both of the connected fax machines must support ECM.
Fax GroupsFax machines are classified in terms of internationally standardised fax groups based on their transfer type and speed. Connections between two devices of different groups is possible; the lowest common transfer rate is selected. The determination of the speed takes place during the handshake (see Handshake). Fax groups 1 to 3 are analogue fax machines. Nowadays, groups 1 and 2 are hardly to be found any longer; fax machines of group
With active fax polling, one can retrieve a document from another fax machine. For fax polling from a larger company offering several polling services, you can also enter
The tone that a fax machine sends out to announce a fax transmission. When the CNG tone occurs, the fax switch of the device recognises an incoming fax call and starts the fax reception.
Fax SwitchThe fax switch checks incoming telephone calls and controls the ringing behaviour of the fax machine. According to the selected mode, fax transmissions will be received either automatically or manually.
Flash KeyWith the flash key, you can make use of additional telephone services if these special functions are enabled for your telephone line. The R key has replaced the hook- flash function. (see Call Waiting,
The handshake is the initial and final phase of a fax trans- mission. After establishing of the connection, fax machines check the group affiliation and features such as size compression or grey tones. After the fax transmission has been completed and before the connection is terminated, the receiving device confirms receipt of the transmission (see Fax Groups).
See Flash Key
Integrated Services Digital Network
ITUInternational Telecommunications Union (UN organisa- tion)
LCDLiquid Crystal Display
MemoryIf there is no paper or toner in your device, the device will store incoming fax transmissions in its memory.
MH
Modified Huffmann (encoding process for faxes, see Encoding)
MMRModified Modified Read (encoding process for faxes, see Encoding)
MR
Modified Read (encoding process for faxes, see Encod- ing)
Outside Line Access Code
The outside line access code is the number or letter that must be dialled before the actual telephone number on a telephone of a private branch exchange in order to establish a connection to the public telephone network (see Private Branch Exchange).
PABX/PBXPrivate Automatic Branch Exchange
Pollingsee Fax Polling
POTSPlain Old Telephone Service
Private Branch ExchangePrivate branch exchanges are common in larger compa- nies. Even private ISDN systems can be branch exchanges. To establish a connection to the public telephone network from a private branch exchange, one must dial a number or press a key before the actual telephone number; in most cases this is zero (see Outside Line Access Code).
PSTNPublic Switched Telephone Network
Pulse DiallingA dialling process that is used in older telephone net- works. You hear a clicking for each number dialled (see Tone Dialling).
Registered Jack 11 (also called Western plug, standardised telephone plug)
ScanningThe reading of a document into the fax memory or into the computer in order to send it, copy it or edit it.
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