Language Teacher PC750x-link file format

1. Each section is stored in the separate file. The filename corresponds to the unit's model (PC750R*, PC750P**, PC750A***). The extension corresponds to the section type (.0 - Personal Telephones, .1 - Business Telephones, .2 - Memo, .3 - Anniversary, .4 - Schedule, .5 - Account, .6 - Deposit, .7 - Withdrawal, .8 - Transfer, .9 - English User's Dictionary, .10 - Non-english User's Dictionary).
   
   For Example: PC750P.3 - filename for Anniversary of PC750P
2. File format.
   First 64 bytes - file header:
   

   offset (dec)	length (bytes)	value
   0	17	signature - "ERS750 data file\0x1A"
   17	15	Reserved
   32	2	signature - “EV”
   40	2	records number in the section
   42	1	Section Type 0x00 - Personal Telephones 0x01 - Business Telephones 0x02 - Memo 0x03 - Anniversary 0x04 - Schedule 0x05 - Account 0x06 - Deposit 0x07 - Withdrawal 0x08 - Transfer 0x09 - English User's Dictionary 0x0A - Non-english User's Dictionary
   43	22	Reserved

   * - for english-russian model PC-750R
   ** - for english-polish model PC-750P
   *** - for english-arabic model PC-750A
   
   Records of the corresponding section in Record Format follow the header.

Language Teacher ER586HT "Partner" link file format

1. Each section is stored in the separate file. The filename corresponds to the Serial_ID of the dictionary. Serial_ID of the dictionary consists of the 6 last digits of the actual serial #, that can be found on the back cover of the dictionary. To get the filename from Serial_ID one should get hexadecimal values of Serial_ID bytes and treat them as corresponding digits characters.
   For example:

   Serial_ID:	123678
   hexadecimal ASCII codes:	31 32 33 36 37 38
   filename:	"313233363738"

   
   The extension corresponds to the section type (.1 - Personal Telephones, .2 - Business Telephones, .3 - Memo, .4-Schedule, .5 - User's Dictionary, .6 - Reverse User's Dictionary).
   
   For Example: "313233363738.3"- filename for Memo of ER586HT with serial ID ER58123678

   Each Serial_ID corresponds to the User name of the PC link program. All users names are stored in the .ini file with the corresponding Serial_IDs.

2. File format.
   

   offset	length (bytes)	value
   0	14	signature - "ER586HT_data_\0"
   14	2	records number in the section

   Records of the corresponding section in Record Format follow the header.

Language Teacher ER200D-link file format

All the section is stored in the same file er200d.dat. The file format can be found on the protocol description page.

Language Teacher Exx486T-link file format

Each section is stored in the separate file. The filename corresponds to the unit's model (EGR486T*, ER486T**, EGP486T***). The extension corresponds to the section type (.0 - Telephones, .1 - Memo, .2 -Schedule, .3 - English User's Dictionary, .4 - Non-English User's Dictionary (Russian*, **; Polish***), .5 - German User's Dictionary*,***.

For Example: EGP486T.2 - filename for Schedule of EGP486T

The file consists of data blocks following each other without file header.

* - for english-german-russian model EGR486T
** - for english-russian model ER486T
*** - for english-german-polish model EGP486T