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Operation Manual V.34 - Modems, Version 07/97

General

General

Safety Instructions

Please read the following safety instructions carefully. They are ment for
your own safety and for faultless function of your devices:

•

Electronical devices are sensitive for electrostatical charges.
Deflect any electrostatical charges before touching the board with
your hands or tools.

•

Disable the power supply before removing the housing (standalone)
or the casing of the rackmounted versions.

•

Boards may be only extracted after any connections have been
removed.

•

Make sure that other units you are going to connect to your device
meet all specifications.

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Содержание LOGEM 928

Страница 1: ...Kommunikations Elektronik GmbH Co Technical Status 07 97 Changes may be made without further notice Editor ke Kommunikations Elektronik GmbH Co Kabelkamp 20 30179 Hannover Germany Phone 49 511 67 47 0...

Страница 2: ...these versions are not specified with their product name at some parts in the manual due to practical reasons Specific features of the different versions are described separately in the operation manu...

Страница 3: ...tches Description 33 3 AT Commands 67 4 Register Allocation 105 5 V 25bis Commands 125 6 Dial Backup Features 135 7 Applications 145 8 Appendix 171 Chapter 8 S1 M2 D1 M5 D2 A O Da Te LOGEM 928 Chapter...

Страница 4: ...LOGEM 928 20 1 14 Front Panel LOGEM LGM 28 8D1 21 1 15 Side View LOGEM LGM 28 8D1 22 1 16 Front Panel LOGEM LGH 28 8D1 23 1 17 Top Side LOGEM LGH 28 8D1 24 1 18 Connection Example 25 1 19 Installatio...

Страница 5: ...OGEM 928 Standalone Version 59 2 7 Transmit and Receive level Rackmounted Version 60 2 8 Board of the LGM 28 8D1 61 2 9 Transmit And Receive Level Top Rail Version 62 2 10 Board of the LGH 28 8D1 63 2...

Страница 6: ...elephone Access Line Selection 139 6 5 Access Line Alternatives 141 7 Applications 145 7 1 Remote Configuration Features 145 7 2 Leased Line Operation Standalone Version 151 7 2 1 Leased Line Operatio...

Страница 7: ...ces LGM 28 8D1 181 Appendix C3 V 24 Interface Allocations 182 Appendix C4 Asynchronous Standard Connection Connection 183 Appendix C5 Synchronous Standard Connection 184 Appendix C7 Modem to Modem Cro...

Страница 8: ...8 Operation Manual V 34 Modems Version 07 97 Contents...

Страница 9: ...lectronical devices are sensitive for electrostatical charges Deflect any electrostatical charges before touching the board with your hands or tools Disable the power supply before removing the housin...

Страница 10: ...10 Operation Manual V 34 Modems Version 07 97 General...

Страница 11: ...l V 34 Modems Version 07 97 General About The Manual This manual presents the features of the modems concerning all functions and meaning of the DIP switches as well as the operational elements and th...

Страница 12: ...12 Operation Manual V 34 Modems Version 07 97 General...

Страница 13: ...18 1 9 2 4 Wire Leased Line Operation with Dial Backup 18 1 10 Fax Operation 18 1 11 License 18 1 12 Front Panel LOGEM 928 19 1 13 Backpanel LOGEM 928 20 1 14 Front Panel LOGEM LGM 28 8D1 21 1 15 Side...

Страница 14: ...14 Operation Manual V 34 Modems Version 07 97 Chapter 1 S1 M2 D1 M5 D2 A O Da Te LOGEM 928 Modem Description...

Страница 15: ...2 V 22bis and V 21 thus allowing for almost errorless data transmission between to terminal equipments Due to the implementation of data compression methods acc to V 42bis and MNP5 data transmission r...

Страница 16: ...e switches of the modem to be replaced For this reason a terminal is not necessary for modem configuration During mixed mode the modem operates with the AT mode but some registers have to be selected...

Страница 17: ...ternational standard for automatic dialing during synchronous or asynchronous operation modes 1 5 Automatic Dialing The modems come with an integrated automatical dialing feature for data connections...

Страница 18: ...ation with Dial Backup This feature is only available for the standalone and rackmounted versions A special board for 2 4 wire leased line operation with dial backup feature is available as an option...

Страница 19: ...terface line S1 ON DTE is operational M2 LED State of interface line M2 ON DCE ready to transmit D1 LED State of interface line D1 OFF no DTE connected Green DTE is active Red DTE transmits data M5 LE...

Страница 20: ...l LOGEM 928 1 2 3 4 Element Description 1 telephone access jack RJ12 for dial line and 2 wire leased line 2 RJ12 jack for 2 4 wire leased line via DBU board optional 3 25pole sub D jack acc to ITU T V...

Страница 21: ...button SERV conn earphone connector ANS LED indicates channel allocation Blinks modem occupies the line PM1 LED State of interface line PM1 ON test activated S1 LED State of interface line S1 ON DTE...

Страница 22: ...97 Chapter 1 S1 M2 D1 M5 D2 A O Da Te LOGEM 928 1 15 Side View LOGEM LGM 28 8D1 Element Description S1 switch DIP switches SET 1 1 SET 1 10 S2 switch DIP switches SET 2 1 SET 2 4 S3 switch DIP switche...

Страница 23: ...nterface line D1 TxD ON receives data from DTE S1 LED State of interface line S1 DTR Yellow DTE operational LB LED ON active during line access D2 LED State of interface line D2 RxD ON transmits data...

Страница 24: ...24 Operation Manual V 34 Modems Version 07 97 Chapter 1 S1 M2 D1 M5 D2 A O Da Te LOGEM 928 1 17 Top Side LOGEM LGH 28 8D1 Modem Description...

Страница 25: ...25 Operation Manual V 34 Modems Version 07 97 S1 M2 D1 M5 D2 A O Da Te LOGEM 928 Chapter 1 1 18 Connection Example TAE 6 NF Datenendeinrichtung S1 M2 D1 M5 D2 A O Da Te LOGEM 928 Modem Description...

Страница 26: ...Set the DIP switches at your device as necessary 3 Connect the V 24 interface cable to the serial output of your DTE V 24 V 28 orRS 232C and the V 24 jack of your modem 4 Connect the telephone access...

Страница 27: ...DTE and all other peripheral equipment printer etc 2 Set the DIP switches at your device as necessary 3 Install the modem into your communications system or switching box 4 Connect the telephone acces...

Страница 28: ...and all other peripheral equipment printer etc 2 Set the DIP switches at your device as necessary 3 Connect the V 24 interface cable to the serial output of your DTE V 24 V 28 orRS 232C and the 25pole...

Страница 29: ...available for the top rail versions of the modems The modems feature an intelligent event report system that may be implemented for monitoring of private premises heating systems water level indicato...

Страница 30: ...30 Operation Manual V 34 Modems Version 07 97 Chapter 1 S1 M2 D1 M5 D2 A O Da Te LOGEM 928 Modem Description...

Страница 31: ...are mode AT and V 25bis 50 2 3 Software Mode Switches Description 52 2 3 1 Loading of Basic Settings 0 1 or 8 52 2 3 2 Basic Setting 0 53 2 3 3 Basic Setting 1 53 2 3 4 Basic Setting 8 User Setting 2...

Страница 32: ...32 Operation Manual V 34 Modems Version 07 97 ON Chapter 2 Switches Description...

Страница 33: ...the other switches S1 and S2 1 S2 The switches tables shown on the coming sides operate with double head lines The upper line presents the DIP switches of the standalone and top rail versions The sec...

Страница 34: ...t may be defined freely can be stored in a specially protected area of the EEPROM by the user This is a user defined basic setting that is stored with the command AT W2 After storing this configuratio...

Страница 35: ...settings 0 8 The settings for compatible mode are activated directly after POWER ON Generation of an user setting The modems allow for generating a user specific basic setting which is normally a modi...

Страница 36: ...ata prot protocol leased line async data prot protocol leased line sync leased line with dial backup This operation is only possible if the modem is equipped with the optional board for 2 4 wire dial...

Страница 37: ...1 S2 4 correspond to the switches of the selected modem Thus the setting of the first14 DIP switches of the modem to emulated can be kept Then the compatible mode can be selceted using the last 5 DIP...

Страница 38: ...dialing inc autom switching with answer tone OFF ON OFF leased line M1 direct switching ON ON OFF direct call outg dir dialing via interface S1 DTR OFF OFF ON S1 2 operation outg autom dialing inc man...

Страница 39: ...loc S2 1 S2 1 OFF 22 ms OFF autom ON V 23 30 ms V 21 200 ms ON acc to S1 10 S2 2 equalizer S2 2 OFF on ON off S2 3 S2 4 only for dx operation S2 3 S2 4 OFF OFF no deactivation ON OFF no deactivation O...

Страница 40: ...nc autom switching with answer tone OFF ON OFF leased line M1 direct switching ON ON OFF direct call outg dir dialing via interface S1 DTR OFF OFF ON S1 2 operation outg autom dialing inc manual switc...

Страница 41: ...F perm ON ON echo ON from DTE S2 5 autom deactivation at S3 1 carrier loss OFF after 10s ON after 250 ms S2 6 bitrate tolerance overspeed S3 2 OFF 1 2 5 ON 2 3 2 5 S2 7 guardtone S3 3 OFF off ON 1800...

Страница 42: ...42 Operation Manual V 34 Modems Version 07 97 ON Chapter 2 Switches Description...

Страница 43: ...eration AT commands are not available as it employs generally V 25bis commands only List of blocked AT commands for asynchronous mixed mode command register used by DIP switch ATF S50 S1 1 S1 3 modula...

Страница 44: ...tom switching with answer tone OFF ON OFF leased line M1 direct switching ON ON OFF direct call outg dir dialing via interface S1 DTR OFF OFF ON S1 2 operation outg autom dialing inc manual switching...

Страница 45: ...for leased line operation S1 10 OFF answer ON originate S2 1 S2 2 clock variant S2 1 S2 2 OFF OFF transmit clock internally T2 T4 ON OFF transmit clock receiver T2 T4 OFF ON transmit clock externally...

Страница 46: ...hing with answer tone OFF ON OFF S1 2 operation outg autom dialing inc manual switching with answer tone ON ON OFF S1 2 operation outg manual dialing inc manual switching with answer tone OFF OFF ON O...

Страница 47: ...al line S2 5 leased line S3 1 dialing procedure S3 1 with DBU OFF pulse OFF 2 wire leased line ON tone ON 4 wire leased line S2 6 S2 7 S2 8 S2 9 S2 10 operation mode asynchronous S3 2 S3 3 S3 4 S3 5 S...

Страница 48: ...autom switching with answer tone OFF ON OFF leased line M1 direct switching ON ON OFF direct call outg dir dialing via interface S1 DTR OFF OFF ON S1 2 operation outg autom dialing inc manual switchin...

Страница 49: ...S2 2 clock variant S2 1 S2 2 OFF OFF transmit clock internally T2 T4 ON OFF transmit clock receiver T2 T4 OFF ON transmit clock externally T1 T4 ON ON S2 3 rate change S2 3 OFF off ON on S2 4 hx simu...

Страница 50: ...ion outg autom dialing inc manual switching with answer tone ON ON OFF S1 2 operation outg manual dialing inc manual switching with answer tone OFF OFF ON leased line switching channel alloc A via DBU...

Страница 51: ...ial line S2 5 leased line S3 1 dialing procedure S3 1 with DBU OFF pulse OFF 2 wire leased line ON tone ON 4 wire leased line S2 6 S2 7 S2 8 S2 9 S2 10 operation mode asynchronous S3 2 S3 3 S3 4 S3 5...

Страница 52: ...loaded later using the DIP switches 2 3 1 Loading of Basic Settings 0 1 or 8 If you are not certain concerning the modem setting or wish to load one of the basic settings this is possible at POWER ON...

Страница 53: ...ll acception after first ring Command phase AT command Command echo On Reports On text reports misc password protection and remote servicing deactivated 2 3 3 Basic Setting 1 Here DIP switch S2 6 S3 2...

Страница 54: ...that can be recalled using the DIP switches Connection dial line Operation mode automatical detection of modulation V 22 V 34 DTE interface autom detection of transmission rate at 8 data bits no parit...

Страница 55: ...he DTE the modem operates with automatical detection of the transmission rate autobaud towards the data terminal equipment DTE The data format is set to 1 start bit 8 data bits no parity and 1 stop bi...

Страница 56: ...S51 004 S54 001 S60 000 S61 000 S62 030 S63 006 S64 001 S65 004 S66 016 S67 000 S80 000 S81 000 S90 005 S91 001 S100 042 S101 000 S102 000 This basic setting allows for btx operation of the modems wit...

Страница 57: ...000 S90 005 S91 001 S100 042 S101 000 S102 000 In delivery state the basic setting 8 is identical to basic setting 0 As an addition remote configuration is possible register S45 1 and the modem is op...

Страница 58: ...g jumpers at the positions ST1 and ST2 Attention Any transmit level changes are not permitted within the network of the German Telekom Sendepegel Position ST2 Pegel W hlltg an Z Standltg an 600 4 5 dB...

Страница 59: ...cessible from the bottom of the devices If changes at the jumpers are necessary the modem has to be opened at the marked spots using a screwdriver BU3 BU1 BU2 BU4 06 07 04 08 05 09 S3 1 4 ST4 2 3 1 4...

Страница 60: ...using jumpers at the positions ST1 and ST2 Attention Any transmit level changes are not permitted within the network of the German Telekom transmit levels position ST2 level dial line at Z leased lin...

Страница 61: ...s Description 2 8 Board of the LGM 28 8D1 1 2 3 4 5 6 7 8 9 10 ON 1 2 3 4 ON 1 32 c b a S1 S2 OPEN S3 1 2 3 4 5 6 ST2 ST1 BU2 S4 BU3 BU1 D5 D4 1 2 3 1 7 20 11 10 1 ST4 1 5 2 6 SET1 SET2 SET3 SET4 SET5...

Страница 62: ...ny transmit level changes are not permitted within the network of the German Telekom transmit levels basic board ST4 levels Germany at Z Austria at 600 4 5 dBm 9 dBm 6 5 dBm 8 5 dBm 10 5 dBm 9 dBm 11...

Страница 63: ...Chapter 2 Switches Description 2 10 Board of the LGH 28 8D1 1 2 3 4 5 6 7 8 9 1 0 O P E N 1 2 3 4 5 6 7 8 9 1 0 O P E N 1 2 19 20 12 1 2 11 12 1 2 11 1 2 5 6 1 2 19 20 ST1 ST3 ST4 S2 S1 ST2 BU1 ST1 ST...

Страница 64: ...using jumpers In delivery state the jumpers are set for operation in the network of the Federal Republic of Germany basic control board board Country ST3 ST1 ST2 ST3 Germany 1 2 Austria 2 3 Switzerlan...

Страница 65: ...tures 69 3 3 1 Test Loops 77 3 3 2 Storing and Displaying of Telephone Numbers 78 3 4 Report Codes 79 3 5 Changing of Register Contents 83 3 6 Activation of Control and Report Lines 86 3 7 Data Protec...

Страница 66: ...66 Operation Manual V 34 Modems Version 07 97 AT Chapter 3 AT Commands...

Страница 67: ...art bit 8 data bits no parity 1 stop bit 10 bit character the automatic baud rate detection operates up to 57600 bps a command line begins always with an AT or at a command line may include several co...

Страница 68: ...ived characters are not returned to the DTE as an echo command parameter default description ATE n 0 1 1 character echo n 0 echo OFF n 1 echo ON AT Befehl Help Feature for AT Commands With the command...

Страница 69: ...tch back then to transparent mode using the command ATO An existing connection may be terminated with the command ATH In direct mode a connection can be terminated by switching the the line S1 DTR The...

Страница 70: ...al number and flash pulse P pulse dialing T tone dialing A B C D special characters for tone dialing modemstays in command mode after dialing necessary for Windows applications group separation charac...

Страница 71: ...ou can initiate an early dial abortion by typing any character ref to register S20 ATDS n Dial Up with Number Storage The modem dials the dial sequence XXX that was saved in the number storage n ref t...

Страница 72: ...2bis fixed 14400 bit s dx ATF 30 V Fast Class V FC ATF 31 V FC fixed 14400 bit s dx ATF 32 V FC fixed 16800 bit s dx ATF 33 V FC fixed 19200 bit s dx ATF 34 V FC fixed 21600 bit s dx ATF 35 V FC fixed...

Страница 73: ...de after typing the command ATO You can change between the two modes using the escape sequence e g and the ATO command If a connection is not yet established the modems do not occupy the telephone lin...

Страница 74: ...inging Tone In delivery state the modems feature an V 8 ringing sequence V 21 acc to ITU T As this sequence might cause problems with some fax switches during establisment of a connection the V 8 ring...

Страница 75: ...l backup originator master 9 4 wire leased line with dial backup answerer slave 10 2 wire leased line via DBU board originator master 11 2 wire leased line via DBU board answerer slave 12 2 wire lease...

Страница 76: ...tempt In those cases several dial attempts might be necessary The timeout between the dial attempts for the same telephone number must be at least 5 secs between the 1st and 2nd and the 2nd and 3rd di...

Страница 77: ...At an active loop the LED A O ANS or LB flash up constantly command parameter default description AT T n 0 1 4 6 17 20 test loops 6 17 20 0 terminate local loop initiated with AT T1 1 initiate local l...

Страница 78: ...meters listed below are applicable with the ATD command parameter description no parameter data button function call P pulse dialing T tone dialing 0 9 dial digits special function only for tone diali...

Страница 79: ...play result codes in numerical or text form command parameter default description ATV n 0 1 1 verbose result codes 0 numerical result codes 1 text result codes ATX n Result Codes Normal Extended The m...

Страница 80: ...er successful dialup As an addition the transmission rate can be displayed with extended result codes With the command ATI n you can select the transmisson rate to be displayed command parameter defau...

Страница 81: ...CT 75 1200 data connection 75 1200 bit s 38 CONNECT 1200 75 data connection 1200 75 bit s 40 CONNECT 1200 HDX HX data connection 1200 bit s 50 CONNECT 300 REL data connection 300 bit s 51 CONNECT 1200...

Страница 82: ...ONNECT 26400 COMP data connection 26400 bit s 85 CONNECT 28800 COMP data connection 28800 bit s 86 CONNECT 31200 COMP data connection 31200 bit s 87 CONNECT 33600 COMP data connection 33600 bit s 90 C...

Страница 83: ...S37 inactivity timeout 0 255 0 S39 XON character 0 255 17 CTRL Q S40 XOFF character 0 255 19 CTRL S S50 transmission procedure 0 5 20 23 255 25 27 30 37 40 52 253 255 S51 DTE interface rate 2 15 20 2...

Страница 84: ...escription for a complete listing of all valid modem registers ATZ n Load User Setting n The modems initiate a reset and then recall one of the user settings specified with n 0 2 from the EEPROM AT F...

Страница 85: ...tartup command parameter default description AT V n 0 4 4 display settings 0 display active configuration 1 display RAM and EEPROM configuration 2 display basic settings 0 2 3 display basic settings 3...

Страница 86: ...S1 Option 2 AT V 25bis Befehle 0 C MNP Handshake 3 H Simuliert Hx 0 Testtaste Datentaste G Modem Flusskontrolle 0 I Connect Meldung 0 Rufannahme 1 K Break Handling 3 L Standleitung 0 Fax Speed 5 L Bl...

Страница 87: ...termi nates the existing connection 2 an ON OFF change at S1 108 termi nates the connection auto answer mode and line switching are not possible in OFF state 3 an ON OFF change at S1 108 causes a rese...

Страница 88: ...ring data trans mission phase AT S n M1 Option The commands controls the interface line M1 107 command parameter default description AT S n 0 2 1 M1 option 0 M1 107is constantly active 1 M1 107 is ON...

Страница 89: ...modems try to establish a data protection protocol V 42 MNP4 for each data connection This feature can be cancelled using the command AZ N n i e the modems operate in normal mode command parameter de...

Страница 90: ...dems is not in reliable mode no error correction V 42 or MNP4 activated data compression with V 42bis or MNP5 is possible 3 auto reliable mode the modem switches to normal mode if the remote modem is...

Страница 91: ...quence and then the command AT Y The modem operating in originate mode now begins to initiate an error protected connection reliable link to the remote modem The remote modem which is in answer mode w...

Страница 92: ...ata only 3 7 BREAK Handling AT B n BREAK Signal Length The modems can send a BREAK signal to the remote modem The BREAK signal length is defined by the command AT B The BREAK signal is transfered duri...

Страница 93: ...a flow control 1 XON XOFF data flow control the mo dems are no longer transparent if AT G1 is selected AT Q n Select Flow Control The command defines the flow control procedure to be utilized between...

Страница 94: ...The command defines if the modems initiate automatic retrains Any requested retrains are acknowledged command parameter default description AT E n 0 1 1 retrain 0 no automatic retrains 1 automatic ret...

Страница 95: ...fduplex simulation 1 halfduplex simulation acc to ITU T V 13 3 9 Module Functions ATSET n x Software Selected DIP Switches The command allows for software selection of features that can be set with th...

Страница 96: ...g active password protection passwords or short names are not displayed when the command AT Z was typed command parameter default description AT M n 0 1 0 password protection 0 super password no passw...

Страница 97: ...o distinguish operation modes the callback number must be prefixed with a combination of two characters Operation mode labeling ZA operation mode A ZB operation mode B ZC operation mode C Example AT Z...

Страница 98: ...s not known to any person it can be defined as a dial prefix using the command AT MP xxx An authorized caller has to enter only his individual callback number area code and subscriber number Now the m...

Страница 99: ...Z n ZC PASSWORT the modem prompts for a callback number after password request General information If you type a password without a callback number the prefixed is very important If a number storage d...

Страница 100: ...tion of the current configuration password The modem prompts the current and then the new password The factory default setting is FERN REMOTE which will be used again whenever you load one of the basi...

Страница 101: ...AK signal in transparent mode Then you have to type the configuration password within10 secs terminated with a carriage return CR Successful initiation of remote configuration is indicated by a OK rep...

Страница 102: ...102 Operation Manual V 34 Modems Version 07 97 AT Chapter 3 AT Commands...

Страница 103: ...103 Operation Manual V 34 Modems Version 07 97 REG Chapter 4 Register Description 4 Register Allocation 105 4 1 Modem Memory Locations 105 4 2 Register Description 107...

Страница 104: ...104 Operation Manual V 34 Modems Version 07 97 REG Chapter 4 Register Description...

Страница 105: ...The internal EEPROM is a read write memory that saves all stored data even after deactivation of the device You can change the EEPROM content The EEPROM stores all short dial register contents phone n...

Страница 106: ...V 34 Modems Version 07 97 REG Chapter 4 Register Description RAM user settings factory defaults EEPROM ROM AT F0 7 AT W0 2 AT F8 ATZ0 2 Einschalten AT Y0 2 modem RAM basic settings 0 7 basic setting...

Страница 107: ...e not erased even after deactivation of the power supply The values stored here are read out automatically from the modem EEPROM to the working storage of the modem after typing the command ATZ n or s...

Страница 108: ...r the last ring S2 ESCAPE Character The register defines the escape character After a sequence of three consecutive escape characters the modems go from transparent to command mode register values def...

Страница 109: ...10 100 100 carrier delay unit secs S8 Dial Pause During processing of the dial character sequences ATD or CRN the modem pauses after recognition of the comma AT command set or equal sign V 25bis comm...

Страница 110: ...S20 Dial Abort Character The register defines the modem operation with receiving of characters at the V 24 interface during the dialing process register values default description S20 0 255 255 dial a...

Страница 111: ...ecified in register S39 The XON character triggers the data terminal equipment to transfer furt her data register values default description S39 0 255 17 XON character CTRL Q 11hex S40 XOFF Character...

Страница 112: ...V FC fixed 21600 bit s dx ATF 35 V FC fixed 24000 bit s dx ATF 36 V FC fixed 26400 bit s dx ATF 37 V FC fixed 28800 bit s dx ATF 40 V 34 ATF 41 V 34 fixed 2400 bit s ATF 42 V 34 fixed 4800 bit s ATF 4...

Страница 113: ...bit s 9 14400 bit s 10 16800 bit s 11 19200 bit s 12 38400 bit s 13 57600 bit s 14 76800 bit s 15 115200 bit s 20 programmable n x 800 bit s ref to register S52 255 automatical detection transmission...

Страница 114: ...ection If the modem is in command mode OFFLINE the local loop is switched Data button The modem accesses the line after manual dial up if the button is pressed Disconnection is possible with DTR S1 Di...

Страница 115: ...stment of data formats for the online and command phase the modems allow for operation with different data formats i e with 7E1 during command phase and 8N1 for online phase During reliable and auto r...

Страница 116: ...y 2 stopbits The modems come with an auto parity detection feature for AT commands Register S61 should be set to 0 as long as the terminal equipment operates with 10 bits per character The parity bit...

Страница 117: ...of reswitching attempts per hour The modem does not attempt further reswitchings when the max number of attempts is reached The register is designed to avoid permanent switchings at errored lines reg...

Страница 118: ...lish Dial Backup Connection The register S0 may not be set to 0 if call acception is needed register values default description S68 0 6 0 establish dial backup connection 0 establish backup route auto...

Страница 119: ...command line does not start with an AT At S80 2 the interface signals are initialized automatically acc V 25bis The command interpreter operates generally acc to V 25bis The modem operates Hayes compa...

Страница 120: ...ing mode 1 is designed for initiating a new dialing attempt every 30 secs If the terminal equipment attempts a new dialing within the 30 secs delay the modem issues a DELAYED CALL report S90 FAX Trans...

Страница 121: ...uring ECM mode The setting of register S91 is overwritten if your fax software employs the AT FECM command Any alterations of the register contents only get active after POWER ON or with the ATZ comma...

Страница 122: ...r applications with activated password protection The terminal equipment does not detect an existing connection if the register is set to 0 unless a valid password was entered after the establishment...

Страница 123: ...25 bis Chapter 5 V 25bis Commands 5 V 25bis Commands 125 5 1 Reports 125 5 2 Dialing and Telephone Functions 127 5 3 Modem Configuration with V 25bis 131 5 3 1 DNL Command for LGM 1200H1 Operation 13...

Страница 124: ...124 Operation Manual V 34 Modems Version 07 97 V 25 bis Chapter 5 V 25bis Commands...

Страница 125: ...mmands are terminated with LF line feed or CR carriage return There is no character echo 5 1 Reports INC Incoming Call The modem signalizes an incoming call with an INC report If you do not disregard...

Страница 126: ...t has failed for more than 1 second CFICB The line is occupied the modem is not ready for dialing CFIFC The modem is constantly blocked after 12 unsuccessful dialing attempts The modem can be reactiva...

Страница 127: ...ct Incoming Call This command deactivates a DIC command given before Incoming calls are accepted automatically by the modems DIC Disregard Incoming Call The modems issue an INC report at an incoming c...

Страница 128: ...lid parameters for dial character sequence xxx Causes a programmable dial pause The period is specified in register S8 Causes a pause of 1 second and W Dial pause recognition and Causes a short line i...

Страница 129: ...l wait for 3 s programmable pause 0 central office request e g for PABX systems with 0 here dial tone recogniition subscriber telephone number 0511 area code Hanover wait 1 s dial pause oiptional 12 s...

Страница 130: ...ax 20 short dial registers are available e g CRS 1 LF PRN n xxx Set Short Dial Register The command allows to store max 20 dial character strings xxx with 40 characters each permanently The informatio...

Страница 131: ...r any modem type to be emulated in compatible mode As an addition the modem to be emulated can be changed during the transmission phase Any settings for V 25bis command phase are performed with DIP sw...

Страница 132: ...imulated Controlled carrier control for V 21 The bold characters are significant Example entry 1 2 3 4 5 6 7 8 DNL 300 300 A L E M A S LF 5 3 2 DNL Command for LGM 2400D2 Operation entry 1 1200 1200 2...

Страница 133: ...p Features 6 Dial Backup Features 135 6 1 Function of the Dial Backup Board 135 6 2 Installation of the DBU Board Standalone Version 135 6 3 Installation of the DBU Board Rackmounted Version 138 6 4 T...

Страница 134: ...134 Operation Manual V 34 Modems Version 07 97 Chapter 6 Dial Backup Features...

Страница 135: ...ial backup DBU board The secondary path switched connection is realized with the line interface of the main board The DBU board has no DIP switches or jumpers as the board is detected automatically by...

Страница 136: ...4 ST4 2 3 1 4 ST6 Test A O D2 M5 D1 M2 S1 W hlltg Standltg zur DEE Stecker netzteil v z Fern melde ltg ST1 1 9 BR3 BR4 BR5 ST5 Place the modem in front of you as shown below and remove the jumpers BR3...

Страница 137: ...the board with the safety screw M2 x 5 as shown in fig 6 3 Now the modem housing has to be closed Insert the front side into the lid of the lower part of the casing and fix the two parts of the casing...

Страница 138: ...LGM 28 8D1 Da Te H rer Answ PM 1 S1 M1 Leitung 9 4 5 Fig 6 4 LGM 28 8D1 Installation of the DBU board Place your modem if front of you as shown below and remove the jumpers BR3 BR5 at the position ST...

Страница 139: ...he board with the safety screw M2 x 5 as shown in fig 6 6 1 2 3 4 5 6 7 8 9 10 ON 1 2 3 4 ON 1 32 c b a S1 S2 BU2 S4 BU3 BU1 D5 D4 Fig 6 6 LGM 28 8D1 with DBU Board 6 4 Telephone Access Line Selection...

Страница 140: ...h the dial backup board The allocation of the VG connector changes according to the selected switching alternative if the modem operates at telephone access lines with CEPT standard ref to fig 6 8 In...

Страница 141: ...c3 a3 4 wire DBU acc to CEPT c7 a7 b4 b6 c3 a3 c5 a5 delivery state 1 in delivery state the connectors La and Lb are for 2 wire leased line operation as well 2 at 2 wire leased line Tx Rx The jumpers...

Страница 142: ...142 Operation Manual V 34 Modems Version 07 97 Chapter 6 Dial Backup Features...

Страница 143: ...ased Line Operation Standalone Version 151 7 2 1 Leased Line Operation Rackmounted Version 152 7 2 2 2 Wire Leased Line 153 7 2 3 4 Wire Leased Line 156 7 2 4 Leased Line Operation with Dial Backup 15...

Страница 144: ...144 Operation Manual V 34 Modems Version 07 97 Chapter 7 Applications...

Страница 145: ...sible if register S45 1 Password During existing connections any modem has to be remotely configured must have a password For this reason only authorized staff can perform any configurations with the...

Страница 146: ...command line has to start with an AT and must be terminated with CR carriage return The AT commands in this manual are valid with only a few exceptions that will be mentioned later The modems are prep...

Страница 147: ...fbau Eingabe Meldung Eingabe Meldung Eingabe Eingabe Meldung Meldung Eingabe Meldung Eingabe Meldung Fernkonfiguration einleiten wenn i O Von diesem Zeitpunkt an ist das lokale LOGEM 928 wieder datent...

Страница 148: ...for remote configuration The newly installed modem is called from a central using a terminal or PC The operating modes may be set according to the actual application AT CR OK OK AT WZ NO CARRIER Eing...

Страница 149: ...of a connection when both modems are in the data transmission phase The remote configuration password terminated with a CR has to be part of the next 40 characters to be transmitted within 10 seconds...

Страница 150: ...onnection are lost and have no further effect If you have any doubts concerning the correctness of alterations you should terminate the connection without saving any parameters As there are no limitat...

Страница 151: ...ased line dial backup board AT commands AT L10 originate AT L11 answer telephone access RJ12 jack switched line TAE6N jack pin 1 2 2 wire leased line with dial backup AT commands AT L6 originate AT L7...

Страница 152: ...c3 2 wire leased line leased line interface AT commands AT L10 originate AT L11 answer leased line VG connector b4 b6 2 wire leased line with dial backup leased line interface AT commands AT L6 origin...

Страница 153: ...e modems allows for modem operation at a 2 wire leased line using the switched line interface In this case line switching is performed using the TAE6N jack The signal is connected to the pins 1 and 2...

Страница 154: ...T Q2 data flow control RTS CTS AT D3 line access only at S1 ON ATF40 modulation acc to V 34 ATS51 12 interface rate 38 4 kbps ATS60 0 S61 0 set data format N81 AT C0 deactivate data compression ATS20...

Страница 155: ...t to ON and S2 6 S2 8 and S2 9 to OFF for this purpose The other switches are set according to the necessary modem functions Example Setting Standalone Version Modem A DIP switch S1 1 S1 3 S1 5 S1 7 S...

Страница 156: ...or connection of asynchronous and synchronous terminal equipment Modem configuration is performed during mixed mode using the DIP switches or AT commands Starting with the basic setting 0 the paramete...

Страница 157: ...he LED indicators A O or ANS rackmounted version are not active for this operation mode The modems change automatically to switched line operation if the leased line is interrupted The modem that has...

Страница 158: ...e Connection 7 2 5 Leased Line Operation with Manual Dial Backup Often 2 or 4 wire connections are implemented for data transmission between local and remote computers The modem establishes a switched...

Страница 159: ...re DTR echo reports OFF S20 0 W S20 0 W and save Now you must deactivate both modems and switch them on again After a short POWER UP test the modems access the leased line and establish a connection A...

Страница 160: ...EM 928 Modem A LOGEM 928 Modem B LOGEM 928 S1 M2 D1 M5 D2 A O Da Te LOGEM 928 Modem C LOGEM 928 Example B A central station is connected to its remote partners via 2 wire leased lines At failures on t...

Страница 161: ...1 AT D E0 Q1 ignore DTR echo reports OFF S20 0 W S20 0 W and save Now you must deactivate both modems and switch them on again After a short POWER UP test the modems access the leased line and establi...

Страница 162: ...e switched line connection the leased line is reactivated whenever the integrated V 21 test modem detects it operational In such a case the switched line is deactivated automatically Attention 1 This...

Страница 163: ...s a transmission range of max 15 km is possible Two modems can be switched in back to back operation for routes of about 20 25 km Connection or transmission problems are often caused by exceeding basi...

Страница 164: ...2400D2 V 22bis Modem 1 DIP switches S1 5 S1 9 S2 9 S2 10 ON all other DIP switches OFF Modem 2 DIP switches S1 5 S1 9 S2 1 S2 9 S2 10 ON all other DIP switches OFF the LED S2 RTS shows green if the da...

Страница 165: ...o overdriving of the modem receiver For this reason a resistor of about 470 ohms should be installed at each wire ref to fig below Example 3 A leased line of about 25 km can be set up by switching of...

Страница 166: ...SR TxD RxD RTS CTS DTR DSR GND 7 2 3 4 5 20 6 7 2 3 4 5 20 6 Tab Wiring Plan for Asynchronous Cross Cable The modems 2 and 3 have to be connected for this application with a cross cable zero modem cab...

Страница 167: ...electro magnetical fields and line overvoltages The modems feature a special protection against overvoltages from the telephone access side ref to block diagram below FKS 8 E La Lb a2 b2 G 3 5 2 8 1...

Страница 168: ...168 Operation Manual V 34 Modems Version 07 97 Chapter 7 Applications...

Страница 169: ...6N 178 Appendix B4 Telephone Access Cable FKS8 TAE 6N 179 Appendix C1 Data Interface LGM 28 8D1 180 Appendix C2 Interfaces LGM 28 8D1 181 Appendix C3 V 24 Interface Allocations 182 Appendix C4 Asynchr...

Страница 170: ...170 Operation Manual V 34 Modems Version 07 97 Chapter 8 Appendix...

Страница 171: ...chronous setting the modems operate with automatical detection of the modulation procedure at the transmission side Towards the data terminal equipment DTE the modem operates with automatical detectio...

Страница 172: ...3 S51 004 S54 001 S60 000 S61 000 S62 030 S63 006 S64 001 S65 004 S66 016 S67 000 S80 000 S81 000 S90 005 S91 001 S100 042 S101 000 S102 000 This basic setting allows for modem operation with btx appl...

Страница 173: ...0 S90 005 S91 001 S100 042 S101 000 S102 000 In delivery state the basic setting 8 is identical to basic setting 0 as an addition remote configuration register S45 1 is possible as well The modem is o...

Страница 174: ...Appendix Appendix B1 Connection to a TAE 6NF Socket Switched Line Operation 1 2 3 4 5 6 N F La Lb E Modemsteuerung Belegt Erkennung Ruf Erkennung u 2 La a2 Lb b2 G E u 2 nsi e La Lb E La a2 Lb b2 G E...

Страница 175: ...eration Manual V 34 Modems Version 07 97 Chapter 8 Appendix B2 Telephone Access Jacks LOGEM 928 1 2 3 4 1 switched line and 2 wire leased line 2 2 4 wire leased line with optional dial backup board Ap...

Страница 176: ...Telephone Access Jacks LGM 28 8D1 LOGEM LGM 28 8D1 Da Te SERV ANS PM1 S1 M1 c b a 1 32 FKS8 Jack VG Connector For switched line operation and 2 4 wire leased line with dial backup the FKS8 jack is co...

Страница 177: ...177 Operation Manual V 34 Modems Version 07 97 Chapter 8 Appendix B4 Telephone Access Jacks LGH 28 8D1 Appendix...

Страница 178: ...witched line cable leased line cable TAE colour descr RJ12 TAE colour descr RJ12 1 grey La 5 1 grey Tx a 2 wr 5 2 brown Lb 2 2 brown Tx b 2 wr 2 3 yellow G 4 3 yellow Rx a 4 4 green E 3 4 green Rx b 3...

Страница 179: ...ppendix B4 Telephone Access Cable FKS8 TAE 6N connector allocation 1 white La 2 brown Lb 3 green G 4 yellow E 5 grey b2 6 rosa a2 shield S 4 yellow 5 grey 6 rosa green 3 brown 2 white 1 coding N TAE 6...

Страница 180: ...DTE operational S1 2 16a M5 109 DCD data carrier detect 18c M3 125 RI incoming call 19a PM1 142 TM test status 22a T2 114 TXC transmit clock from DCE 11a T4 115 RXC receive clock from DCE 13a T1 113...

Страница 181: ...8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 a GND Lb Rx a b2 HD1 T2 HD2 T4 PS3 S1 PS2 M3 S4 T1 PM1 5V 5V GND GND b GND G Tx a 2 w Tx b 2 w E ext call generator S1 1 SET1 S...

Страница 182: ...111 112 140 113 GND GND TXD RXD RTS CTS DSR DTR DTR DCD TXC RXC RI LL TM SPD RL TXC 8 V 8 V prot ground ground transmit data receive data request to send clear to send data set ready data terminal rea...

Страница 183: ...1 S 1 2 M1 M5 M3 PS2 M4 S4 PM1 PS3 101 102 103 104 105 106 108 1 108 2 107 109 125 140 112 111 142 141 1 7 2 3 4 5 20 20 6 8 22 21 12 23 25 18 prot ground ground transmit data receive data request tos...

Страница 184: ...M4 S4 PM1 101 102 103 104 105 106 108 1 108 2 107 109 125 140 141 115 114 113 112 111 142 1 7 2 3 4 5 20 20 6 8 22 21 18 17 15 24 12 23 25 prot ground ground transmit data receive date request to send...

Страница 185: ...c to ISO 2110 for DTE connection A V 24 interface cable is part of the delivered items The signal report and data lines come with V 28 levels 25pole Sub D Jack 14 15 16 17 18 19 20 21 22 23 24 25 1 2...

Страница 186: ...indicates the modem specification The K number is being augmented after any alterations concerning software or hardware 2 Software Mode AT Commands After typing the command ATI0 the modem issues the...

Страница 187: ...69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 12...

Страница 188: ...ead Only Memory The factory defaults are stored in the ROM where they are available permanently EEPROM Electrically Erasable Programmable Read Only Memory User configuration and phone numbers are stor...

Страница 189: ...r constant interface rates towards the terminal equipment if multimode modems are employed that support different modulations data flow control Data flow control is implemented to avoid data loss duri...

Страница 190: ...occur data compression Due to the data compression the data of the trans mitting modem is compressed with special algo rithms and transmitted The receiving modem de compresses these data and transfer...

Страница 191: ...52 power supply power supply adapter inp 230V 50HZ 7VA 5 V 5 24 V 20 outp 7V 50Hz 4 2VA ca 300 mA max 100 mA electrical values for line switching return loss attenuation symmetrie 14 dB 55dB at 300 3...

Страница 192: ...192 Operation Manual V 34 Modems Version 07 97 Chapter 8 Appendix...

Страница 193: ...omatic dialing 17 70 autoreliable fallback character 91 autoreliable mode 189 190 B Backpanel LOGEM 928 20 backspace character 109 backup number 18 basic setting 0 171 basic setting 34 basic setting 1...

Страница 194: ...protection 17 data protection protocols 15 16 145 150 DBU 188 190 DBU board 137 DCE 188 190 DELAYED CALL 76 Dial Abortion 71 dial backup 118 188 dial backup board 75 135 dial prefix 100 dial sequence...

Страница 195: ...Panel LOGEM LGH 28 8D1 23 G glossary 188 guard tone 74 H halfduplex simulation 95 Hayes standard 67 I index 193 installation and commissioning 26 ITU T 15 16 18 J jumpers 138 L leased line 157 leased...

Страница 196: ...d mode 16 34 Mixed Mode Switches 43 MNP 1 4 190 MNP 5 190 MNP block length 89 MNP4 145 150 modem cross cable 185 modem description 15 modem identification 73 186 modem message 29 modem settings 86 N n...

Страница 197: ...speed buffering 189 190 standalone modem 15 standalone version 26 stream link mode 89 super password 96 switched line 18 157 switches description 33 switches tables 33 synchronous standard connection...

Страница 198: ...ms Version 07 97 Chapter 8 Appendix U user setting 35 84 87 V V 24 interface allocations 182 V 25bis commands 17 125 V 42 145 150 190 V 42bis 190 verbose result codes 79 X XOFF character 111 XON chara...

Страница 199: ...199 Operation Manual V 34 Modems Version 07 97 Chapter 8 Appendix...

Страница 200: ...200 Operation Manual V 34 Modems Version 07 97 Chapter 8 Appendix...

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