Quality Computers Q-Modem 2400 User Manual Download | Manualshive

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Summary of Contents for Q-Modem 2400

Page 1: ...m w w w w w o w _ w w w w w w a _ w w w w w f J Id G f r 11111 l _JS s_ _ JJl _ _i I 1X C i _ j _ V _ _ _ _ _ _ _ _ IM auality camp1ters m u uu w w w w w w w w w w w w w w w w...

Page 2: ...rovides the excellent price performance you ve come to expect from Quality Computers And the Q Modem 2400 is easy to use with a few simple commands you can access other computers and networks all over...

Page 3: ...on When Shipped 28 5 CHANGING S REGISTER SETTINGS 29 Reading the Contents of an S Register 29 Modifying the Contents of an S Register 30 Using a Register Without Naming lt 31 Table of Contents 6 BELUC...

Page 4: ...ngs 300 baud protocol Bell CCITT and dumb smart mode You probably don t eed to change any of them but if you che k them now you won t have to worry about them later when it is less convenient 300 Baud...

Page 5: ...ctions on handling this problem 6 Getting Started If the RD and or SD lights arc lit or if they are flashing on and off one of the following things is happening your RS 232C cable is shorted out there...

Page 6: ...to perform various tasks from dialing phone numbers to changing the modem speaker volume In fact when you tell your telecommunications software to perform a task it uses AT com mands to do it Remember...

Page 7: ...xcept Al and be in all uppercase AT or all lowercase at characters Multiple commands can appear on one command line You can separate these with spaces to improve readability the modem s command interp...

Page 8: ...software something it does not inherently know or you may need to set your modem up to auto answer if your software can t do 1 for you This chapter tells you what you need to know in these situations...

Page 9: ...s off hook waits for a dial tone and then touch tone dials the number 405 555 9624 14 Dialing Telephone Numbers and Answering Calls If the modem does not receive a valid carrier within 30 seconds the...

Page 10: ...this example contains the dial command modifier which causes the modem to go on hook hang up for one half second This operation sometimes called a flash or hook flash is used in some telephone system...

Page 11: ...umber of rmgs the modem will wait before it answers the call The following example command sets the modem so it answers incoming calls after the second ring AT 50 2 CR If you set the modem to auto ans...

Page 12: ...00 1200 and 2400 bps When the Q Modem 2400 is switched on the rate defaults to the value previously stored in the nonvolatile memory Then each time your software sends an AT command line to your modem...

Page 13: ...ise the active configuration The Q Modem 2400 AT commands let you change most of these registers indirectly by issuing single commands They are explained in Chapter 2 and Appendix A As an alternative...

Page 14: ...B 27 D S L M medium Ml US Can none none X4 disabled enabled disabled originate disabled ignored 01 echo enabled words pulse 5 Bell 212A low medium high see description of M command see description of...

Page 15: ...modem as described in Chapter 6 you ll want to note that issuing the F command sets the 1200 baud protocol to Bell 212A Chapter 6 explains how this protocol was set when you originally received your m...

Page 16: ...t the modem is ready to process a new command 28 Changing S Register Settings Using a Register Without Naming It The Sr n and Sr commands can also be used without directly naming the register The mode...

Page 17: ...odem 2400s made for use in places other than the United States and Canada use these protocols If you are not sure which protocols you should use for calls within your country please contact your local...

Page 18: ...f test tests your modem We recommend that you only use these tests if you re having problems with your modem How to Run a Test To run a test simply be sure you re in command state and then start the t...

Page 19: ...c Tests 8 SOLVING PROBLEMS Solving Problems Yourself If you encounter problems with your Q Modem 2400 immediately disconnect your modem Then try to solve the problem yourself using the following list...

Page 20: ...rt on the terminal The RS 232C cable is damaged or the wrong type for your computer Get a working cable from your dealer Your computer s serial port is not working properly Contact your local computer...

Page 21: ...ibe each Q Modem 2400 command in detail Be sure you have read Chapter 2 before using these commands The commands arc presented alphabetically within each of these categories general commands phone lin...

Page 22: ...their word and number representations and their meanings Determines whether result codes are displayed as one or two digit decimal numbers or as words V Causes result codes to be displayed as numbers...

Page 23: ...the command may be used when bit error rates are excessive to reduce errors attributed to loss of equalization If the errors arc d e to s mc other cause issuing this command will not improve performa...

Page 24: ...em sends a space of 1 6 seconds or more an H command is issued the modem detects an on to off transition on DTR this applies if the 02 command has been used previously to tell the modem to disconnect...

Page 25: ...tion on OTR The TR indicator on the front of the modem is on if OTR is on and off if OTR is off 02 Causes the modem to disconnect assume the asynchronous command state and i 3ble auto answer mode if i...

Page 26: ...remote digital loopback with self test according to CCITI Recommendation V 54 During the test phase an internally generated data pattern of alternate binary ones and zeros at the selected bit rate is...

Page 27: ...front of t_he external modem acts differently if auto answer is enabled or disabled When auto answer is e abled AA is usually lit but goes off during an incoming call s nn s Wh n aut answer is disable...

Page 28: ...1 to 255 that represents the amount of time after the remote modem hangs up that the Q Modem 2400 waits for a valid carrier before disconnecting A long enough time allows the remote modem s signal to...

Page 29: ...see TS command 6 0 No echo 1 Echo default 0 Enabled default 1 Disabled 0 Number result codes 1 Word result codes default 0 Smart default 1 Dumb Settings S14 Bit Mapped Options au llil 0 Reserved 1 Com...

Page 30: ...U S Canada see P command default 33 67 U K Hong Kong S Register Descriptions 57 1 Reserved 2 Clear to Send CTS 0 CTS follows RTS Request to Send RTS default synchronous only 1 CTS follows see R comman...

Page 31: ...asserted Settings 0 0 Asynchronous default 0 1 Reserved 1 0 Reserved 1 1 Reserved RT5 CT5 Delay default 1 units 1T100 second 3 Reserved 1 0 Asynchronous synchronous 526 5 2 7 Bit Mapped Options Bit J...

Page 32: ...me command state if an on to off transition on DTR to go on hook and disable auto answer if an on to off transition on DTR or to initialize if an on to off transition on DTR The D command description...

Page 33: ...se dial ability to dial stored telephone number programmable pauses wait for dial tone before dialing wait for silence after answer originate call from modem that s in auto answer mode hook flash touc...

Page 34: ...erference Problems Stock No 004 000 00345 4 This booklet was prepared by the Federal Communication Commission and is available from the U S Government Printing Office Washington DC 20402 See individua...

Page 35: ...dial See dialing 66 INDEX B command 25 31 45 backspace 52 baud rates 13 20 21 25 58 1200 baud protocol 25 26 45 59 300 baud protocol 5 62 and communication protocols 30 32 problems 35 setting 22 BBS1...

Page 36: ...uration See configuration FCC rules 65 firmware ROM See memory guard tones 25 47 58 H command 17 43 hanging up 18 37 43 headers 62 hook control 43 HS light 7 68 international calls 5 13 30 32 jumpers...

Page 37: ...4 ring back 52 ring counter 51 RING result code 50 ROM memory See memory RS 232C cable 4 RS 232C connector circuit descriptions 60 61 pin assignments 60 61 70 S dial command modifier 14 S registers 23...

Page 38: ...upport phone number 37 telecommunications software See software telephone cable 4 jack 4 47 56 telephone numbers dialing See dialing storing 18 45 terminal software See software tests choosing 33 comm...

Page 39: ...111111111111111 I IIIIIIll IIIllIll II U QC 98113 Quality Computers 20200 Nine Mile Rd St Clair Shores MI 48080 1 800 777 3642 Technical Support 313 774 7740...

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