Tandy DCM-7 Operation Manual Download

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Summary of Contents for DCM-7

Page 1: ...1 _ 2 Nr F L 4 OPERATION MANUAL Cat No 26 1394 L 1q 1 J t 1Yr 7...

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Page 3: ...INCLUDING BUT NOT LIMITED TO ANY INTERRUPTION OF SERVICE LOSS OF BUSINESS OR ANTICIPATORY PROFITS OR CONSEQUENTIAL DAMAGES RESULTING FROM THE USE OR OPERATION OF THE EQUIPMENT OR SOFTWARE IN NO EVENT...

Page 4: ...om the receiver Plug the computer into a different outlet so that computer and receiver are on different branch circuits Warning This equipment has been certified to comply with the limits for a Class...

Page 5: ...ode operations 15 Analog self test mode 17 Always auto answer mode operation 18 On line abort conditions 18 Result codes 19 3 Hayes protocol mode operation 21 Command codes 21 Registers 24 Result code...

Page 6: ...ings in Tandy Protocol Mode 6 2 DIP Switch Settings in Hayes Protocol Mode 8 3 Result Codes Tandy 19 4 Commands with Parameters Hayes 22 5 Basic Command Codes Hayes 23 6 Dialing and Answering Command...

Page 7: ...same operational modes used in Tandy protocol For example you can set the DCM 7 for manual originate or manual answer mode in which you manually dial the telephone number or answer an incoming call w...

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Page 9: ...Modem is not being used OFF HOOK indicator lights when the Modem is ON LINE connected to the phone line TERMINAL READY indicator lights when the terminal is supplying the DTR Data Terminal Ready signa...

Page 10: ...jack connects the telephone to the Modem POWER jack connects the Modem to the AC power adapter WALL JACK phone line cord connects the Modem to the telephone line PHONE CD Figure 2 Rear Panel View Bef...

Page 11: ...and 3000 personal computers can be used with either communications software Tandy protocol When you select Tandy protocol mode set DIP Switch 7 to ON This tells the Modem to set other DIP switch func...

Page 12: ...true carrier detecf2 according to the G command input No function No function No function Auto answer enable Modem assumes auto answer upon power up OFF Auto answer disable Modem assumes auto originat...

Page 13: ...ol mode position Switch 7 to OFF In this protocol mode the remaining switches function differently from those in Tandy protocol Refer to Figure 5 for suggested switch set tings in Hayes protocol mode...

Page 14: ...sy operation position Switch 5 to OFF to echo the command line Set Switch 4 to OFF and Switch 3 to ON to send the verbal result codes to the screen Communications protocol The following criteria must...

Page 15: ...r the first time or when you seem to be getting garbled data use the self test mode to help you find the cause of the problem Refer to the section on self test in Appendix A Tandy protocol reference o...

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Page 17: ...anual operation mode In this mode you can control what the system does by manually dialing and answering the phone When you want the DCM 7 to dial a phone number or answer the phone for you set it to...

Page 18: ...etting the internal switches that will tell it what operations are to be performed 8 When the echoes on your computer screen enter LIST command L to display or list the Modem s current parameters When...

Page 19: ...properly formatted see D command Tandy prQtocol reference press to force the Modem to seizethe telephone lin s and to begin dialing the number OFF HOOK indicator lights The screen shows DIALING T 111...

Page 20: ...r is the sound you hear through the built in speaker or when you pick up the receiver while the Modem is in communication with another modem 4 The answer station always issues the X command first Afte...

Page 21: ...ce phone num ber When the information service answers the phone you will hear a high pitched tone 3 Press The OFF HOOK indicator lights As soon as the Modem de tects the carrier tone it issues low pit...

Page 22: ...pt by pressing ENTER which is the CR Carriage Return key To change the ring number type in the new number Note that only a number key or the ENTER key is accepted If you press any other key the DCM 7...

Page 23: ...NNECT result code To dial the number again press 00 The Modem automatically dials the number stored in dialers memory If you press without having stored a number the Modem displays the NO NUMBER resul...

Page 24: ...racter and space disconnect Loss of carrier The carrier monitored is the one that is sent over the telephone line not the false carrier generated by the DCM 7 In all modes except TEST if carrier is re...

Page 25: ...press Note The clear memory command C sets the Modem to off line mode Press again to enter command receptive mode Result codes The DCM 7 sends the result codes to report its status or telephone line c...

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Page 27: ...in logical order in order to be executed Ifthe command line exceeds the buffer character limit the Modem will not execute the commands and instead sends an error result code Table 8 Example 1 Sample c...

Page 28: ...d E does not echo when parameter 0 is assumed It does echo when parameter 1 is issued E used alone is the same as EO Table 4 Commands with Parameters Code Parameter Function Default Q 0 Result codes O...

Page 29: ...e mode from conim nd mode Resets the Modem to default condition Table 6 Dialing and Answering Command Codes Code Description P Pulse Dia I Function Sets the Modem to originate telephonf3 call D comman...

Page 30: ...s the dial tone wait time 2 S7 1 255 Seconds Defines the carrier wait time 30 SB 0 255 Seconds Defines pause duration for comma 2 actual maximum value is 54 but a value up to 225 can be input S9 1 255...

Page 31: ...3 OK You can also check the values of plural registers in the same command line To check the values of register 83 and register 84 type AT S3 S4 ENTER The screen might show 013 010 OK Sx n Change the...

Page 32: ...arrier 2 3 4 CONNECT RING Detected an incoming phone line ring signal NO CARRIER Carrier was lost or never heard ERROR Error in the command line command is invalid not recognized by the Modem or the c...

Page 33: ...nd originate call using touch tone di ling NUMBER Send number which will b input at terminal mode SEND M S nd M to force the DCM 7 to exe cute the commands WAITC Wait for carrier d tect before con tin...

Page 34: ...the screen for your autolog file might show STATUS Y 30 8 N 1 0N OFF OFF OFF O CALL 123 4567 Use your local TELENET number PAUSE S SEND AM M RECV TERMINAL SEND D1 M RECV SEND C 60942 M RECV SEND DJNS...

Page 35: ...Appendices I...

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Page 37: ...example you ll save time and be able to take advantage of lower telephone rates The DCM 7 is completely programmable using the commands shown in Table 9 These commands can be entered either 1 n upper...

Page 38: ...ode The command can be used at any time while in command mode It will be echoed to the computer but no action will occur Redefine abort character The abort character allows the Modem to be disconnecte...

Page 39: ...s no need to follow the C command with the execute command X because the memory is cleared immediately when is pressed After this command is issued the DCM 7 returns to off line mode Use the wake up c...

Page 40: ...he previous call if R nor T does not precede the telephone number The DCM 7 allows you to mix signaling types in a telephone number For example the sequence DR234333PPT lll 123 4567 says to pulse dial...

Page 41: ...rue carrier signal on the telephone line and lights up the CARRIER DETECT indicator The default condition of this command is set by DIP switches 2 and 6 The G command is disabled when DIP SW 2 is ON I...

Page 42: ...1 List command The list command is used to review the current state of the DCM 7 The screen shows MODE A TYPE 0 F CD Y SPKR Y ANSW 2 DTRY 1 TEST N NUMB Table 10 List Settings and Related Commands Para...

Page 43: ...SPKR N Enter again to turn it ON SPKR N will change to SPKR Y Q q Self test command This command forces the DCM 7 to enter the self test mode to talk to it self when the X command is issued With this...

Page 44: ...er second X x Execute programmed comm and s This command signals the DCM 7 that programming is completed and it is time to go ON LINE off hook and execute your fnstructions When the X command is recei...

Page 45: ...returns to command mode and displays the result code OK The telephone line will remain connected until you input HO ON HOOK command or Z Reset command The escape character can be redefined with regis...

Page 46: ...odes shown in Table 11 When used alone D sets the Modem to auto originate mode Codes 0 9 SPc lC9 p T R comma semicolon Example Table 11 Dialer Codes Function Used for the telephone number Us9 d to mak...

Page 47: ...telephone number sequence You can change to pulse dialing mode from touch tone dialing mode by entering ATP any time you want When the type of dialing pulse or touch tone is not specified in the com...

Page 48: ...e password Return to command mod Ent r the transaction Return to command mod Terminate the call Al Repeat the command line Redial command The Modem repeats the command line stored in the command buffe...

Page 49: ...he switch is ON the default is EO F f Full half duplex Selects full or half duplex communications mode Fl sets the Modem to com municate in full duplex mode that only echoes received data when ON LINE...

Page 50: ...tone ring back tone busy signal and carrier tone The speaker turns OFF whenthe Modem recognizes a carrier signal and sends a CONNECT result code When you want to continue monitoring the data communica...

Page 51: ...The default value decimal is set to 8 To change the backspace function key select a value between 0 and 32 or 127 These numbers do not include printable ASCII characters 33 126 S6 Dial tone wait time...

Page 52: ...es not receive a carrier tone within the time fixed by the SlO value it disconnects the telephone line When you set the value to 255 the Modem assumes the carrier is always present and ignores carrier...

Page 53: ...itted from the computer is looped back to the receiver and processed just as if it were in communications over the telephone lines Keys entered from the computer are echoed to the screen Since the Mod...

Page 54: ...as shown in the figure below To accomplish this monitoring mod the Modem s carrier transmitter should be turned off and loss of carrier condition should be ignored For originate mode input AT CO 810...

Page 55: ...y not ring In rural areas a total of 3 may impair ringer operation To be sure check with your local telephone company The registration number as well as ringer equivalence number appears on the bottom...

Page 56: ...ompany is authorized to charge you for the installation of such jacks The U S 0 C number for the plug connection is RJ llC Multi line The DCM 7 Modem can be used with a multi line telephone but you ma...

Page 57: ...the other end of the cable into the computer s DB 25 jack For the following computers you ll need option boards which contain an RS 232C interface to connect your DCM 7 Contact your Radio Shack Com pu...

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Page 59: ...r up into the call waiting state and monitor the telephone line for an incoming call When DTR Data Terminal Ready is asserted this happens when log ins are allowed using the enable command the Modem w...

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Page 61: ...ning damage is uncommon but can oc cur to phone and other electronic devices If you are concerned about it or live in an area with frequent and or severe electrical storms it is suggested that you unp...

Page 62: ...on must be performed by a qualified Radio Shack service technician With this option the internal circuitry can be configured to signal a local network that there is a MODEM on the line instead of a te...

Page 63: ...ing environment Storage 57 Specifications F Tandy protocol Hayes protocol Full or half duplex Automatic answerI originate Manual answerI originate Mark 1270 Hz Space 1070 Hz Mark 2225 Hz Space 2025 Hz...

Page 64: ...Specifications Dimensions H x W x D Weight 58 1 3 4 x 6 7 10 x 10 1 4 45x170x260 mm 24 oz 680 g...

Page 65: ...MULTI LINE PHONES AND OTHERWISE SHOULD BE OPENED 6 NO FUNCTION INC FUNCTION IVERIAL RESULT CODES I NUMERIC RESULT CODES NO FUNCTION INO FUNCTION fNO RESULT CODES ISENO RESULT CODES NO FUNCTION lNO FUN...

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Page 67: ...aring of 43 Command codes 32 38 39 47 programming in Hayes protocol 21 22 table of 23 Index parameters table of 22 programming in Tandy protocol 11 17 table of 31 Command mode returning to 42 Command...

Page 68: ...2 On line mode aborting 18 loss of carrie r 18 62 loss of data terminal ready 18 receiving a long space 19 transmitting the abort character 18 32 Originating a call 37 Pause command in Hayes protocol...

Page 69: ...he speed of 46 Transmit data indicator 3 Transmitter carrier signal 43 Trouble shooting 55 True carrier detect 6 8 True data terminal ready 6 8 Valid dialer codes 33 34 40 Verbal result codes 8 22 26...

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Page 71: ...oken Radio Shack reserves the right to refuse to service the product or to void any remaining warranty on the product 2 If any computer product purchased from Radio Shack has been modified so that it...

Page 72: ...5A6 CUSTOM MANUFACTURED FOR RADIO SHACK A Division of Tandy Corporation FORT WORTH TEXAS 76102 Printed in Taiwan 811017400A...

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