US Robotics COURIER HST, User'Smanual

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Page 2: ...ic COURIER HST MODEM 9600 2400 1200 300 BPS AUTO DIAL AUTO ANSWER MODEM M610 0 101 00 WITH USR HSrMERROR CONTROL USER S MANUAL USRobotics Inc 8100 North McCormick Blvd Skokie IL 60076 c 1986 All Rights Reserved ...

Page 3: ...d Digital Data Service DDS are trademarks of American Telephone and Telegraph MCI Mail is a service mark of MCI Communications Incorporated Microcom Networking Protocol MNP is a trademark of 1icrocom Inc Sprint is a trademark of General Telephone and Electric ...

Page 4: ...ibility CHAPTER 2 Set Up and Testing Package Components Operational Requirements Assembling the Modem Testing Analog Loopback Self Test Additional Test Procedures CHAPTER 3 0perations at a Glance Data Format Error Control Dialing HST Compatible 9600 bps MNP Compatible 2400 or 1200 bps Non MNP Compatible 2400 1200 300 bps Flow Control Maximum Throughput High Speed Channel Turnaround Link Negotiatio...

Page 5: ...ntrols Setting Using Defaults Writing Defaults to NRAM W Loading the Factory Defaults F Resetting to NRAM Defaults Z Storing Telephone Numbers Zn s Result Codes Response Modes Vn Result Code Sets Xn Result Codes Options Table Options Summary Quiet Mode Qn ARQ Result Codes An Local Echo Command Mode Local Echo En Online Local Echo Fn The Audio Monitor Speaker Control Mn Modem Clock Usage Kn Transmi...

Page 6: ...Automated Redialing Continuous Repeat Continuous Reexecute A Exiting Repeat Mode Dialing a Stored Number DSn Pulse Dial Make Break Ratio Pn Escape Code Operations ARQ Mode Response Normal Mode Responses Returning Online 0 Hanging UP Hn Automatic Answering Suppressing Auto Answer Points to Remember U S CCITT Answer Tone Bn CHAPTER 7 Queries and Help Screens User Inquiries In S Register Query Sr Sl7...

Page 7: ...t End Indicators DIP Switch Summary Default Settings S Register Summary ASCII Chart APPENDIX C Alphabetical Command Summary APPENDIX 0 Problems and Solutions If You Still Have Problems APPENDIX E Additional Operational Information Using Both Voice and Data Communications High Speed Low Speed Protocol Retrain Sequence PBX Dedicated Line and Leased Line Operations Hewlett Packard Installations APPEN...

Page 8: ... or limitation of inci dental or consequential damages or allow limitations on how long an implied warranty lasts so the above limitations or exclusion may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to state To obtain service under this warranty contact the U S Robotics Technical Support Department at 800 982 5151 in Illi...

Page 9: ...the telephone number s to which the Courier is con nected and the FCC information printed above If the telephone company has any questions or raises prob lems ask them to call the Technical Support Department USRobotics Inc 800 982 5151 in Illinois 312 982 5151 If the modem is malfunctioning it may affect the telephone lines In this case disconnect the modem until the source of the difficulty is t...

Page 10: ...erference will not occur in a particular installation If this device does cause interference to radio or television reception which you can determine by monitoring reception when the modem is on and off try to correct the problem with one or more of the following measures Reorient the receiving antenna Relocate the computer with respect to the receiver Relocate the computer and or the receiver so ...

Page 11: ...ity designated by the sup plier Any repairs or alterations made by a user to this equipment or equipment malfunctions may give the telecommunications company cause to request the user to disconnect the equipment For your own protection make sure that the electrical ground connections of the power utility telephone lines and internal metallic water pipe system if present are con nected together Thi...

Page 12: ... 1 3 before operating the modem Chapter I Introduction Chapter 2 Assembling and testing the modem Chapter 3 lmmediate operations essentials Chapter 4 Interface controls Chapter 5 Internal controls Chapter 6 Calling answering and disconnecting Chapter 7 Inquiries and Help screens The appendixes in Part II cover the following subjects Background information on error and flow control Summaries and ta...

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Page 14: ...mit In practice the modems seldom need to reverse channels since the asymmetric design reflects typical com munications sessions brief messages typed at one end of the link files sent from the other The asymmetric approach provides the most efficient and economical strategy for using ordinary phone channels at high speeds The HST error control protocol uses sophisticated error detection methods to...

Page 15: ...o dial tone or the distant phone is ringing On command the modem displays its current settings a handy way to check your transmission rate S registers and other operational controls You can also display screens that summarize the command sets Dial command options and S register functions Operational summaries and other information are printed on the bottom of the modem case A Dual In Linc Package ...

Page 16: ...e RS 232C standard interface For more information on the RS 232C interface see Appendix 8 I Can be used with any computer or terminal that uses ASCII the standard character code supported by most equipment manufacturers Connects with any modem whose signal scheme is compatible with the following standards at the given data rate 300 bps 1200 bps 2400 bps 9600 bps Bell 03 Bell 212A V 22bis USR HST U...

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Page 18: ...re to read the information in the front of this manual about radio and television interference and connecting to the phone company In addition you should be aware of the following Follow the operating instructions in Appendix E 4 if the modem is to be used in either of the following types of installation IJ The modem will be installed in a key system PBX in which RJ 12 or RJ 13 telephone jacks are...

Page 19: ...ormation on the RS 232C interface see Appendix B 1 The modem takes a DB 25P 25 pin plug connector but computer equipment varies check the serial port at the rear of your machine The port will be labeled Modem Communications or EIA or with a phone symbol Don t use the port marked Printer or Aux If the port is a plug specify a DB 25S socket connector to your dealer If the port is a socket specify a ...

Page 20: ...re 2 3 Connected Courier HST 4 Check to make sure that the power switch is OFF press it towards the zero in the l 0 icon on the bottom label Then plug the small end of the power supply cord into the power jack at the back of the modem and plug the power adapter into a standard 115 volts AC wall socket 2 3 ...

Page 21: ...ositions of the bank of Dual In Line Package DIP Switches located at the back of the modem These switches are set at the factory to the posi tions desired by most users as shown in Figure 2 4 QUAD 1 2 3 4 5 6 7 8 9 10 o IL 11 l ll I I L I I 1 l I I I I Figure 2 4 DIP Switch Factory Settings Use the guide on the bottom of the modem or refer to the more detailed summary in Appendix 8 4 to determine ...

Page 22: ... to function as a terminal rather than a processor everything you type at the keyboard goes directly to the modem If necessary refer to your communications software documentation for instructions 3 Next check to see if your machine and modem are com municating with each other by entering the command to get the modem s attention Type either upper or lower case letters not a combination In this manu...

Page 23: ... sent to it and returns the data to the screen Follow these steps I Because modulation at 9600 bps is asymmetric the self test must be performed at 2400 bps and below The first step is to set your terminal or software to 2400 bps 2 The modem s default error control setting is M4 But if the modem is set for error control M4 or MS you won t be able to tell if there is a problem with the modem s tran...

Page 24: ...4 S16 0 er You may want to take the time at this point to read the following information on other test options or skip to Chapter 3 for basic operational guidelines S register 16 has five settings explained in what follows 0 I 2 Data Mode no testing Analog Loopback Dial Test 4 Test Pattern 5 Analog Loopback with Test Pattern I To perform analog loopback testing of the Originate or Answer frequency...

Page 25: ...ting equipment and the phone line If S 16 is set to 4 and a Dial command issued the modem transmits the test pattern upon connection to the remote system If set for Auto Answer DIP switch 5 UP the modem transmits the test pattern when it answers a call 4 The preceding instructions test the modem at 2400 bps To test the modem at 1200 or 300 bps set your termi nal or software to the lower speed and ...

Page 26: ...efault The Courier attempts an ARQ connection if the signal isn t recognized the modem contin ues in Normal Mode M0 ARQ Mode The Courier attempts an ARQ connection if the signal isn t recognized the modem hangs up Use these settings commands to call the following types of modems at the indicated speeds Terminal software 19 2k preferable or 9600 bps Type AT H3 D phone number er The command includes...

Page 27: ...nces cause frequent retransmissions The rate at the local terminal interface is higher than the link rate The volume of data transfer is high Flow control commands are covered in Chapter 4 Use these settings for both Originate and Answer Modes Terminal software Modem 19 2k bps Fixed terminal interface rate BI Variable link rate N0 Transmit Data flow control H 1 preferred H2 or H3 As described in C...

Page 28: ...to load the settings stored in NRAM on power up Write your own configuration defaults to NRAM with the W command To review the NRAM settings refer to Appendix 8 3 or type ATl5 er Use Zn s to store four frequently called phone numbers in NRAM nonvolatile memory 11 positions 0 through 3 s number string The string may contain a maximum of 36 characters and any Dial command options Example AT Z 9 1 31...

Page 29: ...age Return Add the Repeat Mode command to the Dial command string and the modem automatically redials up to 10 tries AT D5551234 er ATD5551234 er You may include the Repeat command when you store a phone number string in NRAM AT Z2 5551234 er Set the inactivity timer S Register 19 if you suspect that a connection may be inadvertently left open without data transfer ...

Page 30: ...ntrol commands and re sponse codes In summaries the terminal is referred to as DTE for Data Terminal Equipment while the modem is referred to as DC for Data Communications Equipment DTE DCE indi cates the terminal modem interface DCE DCE indicates the link modem to modem interface For more information see the Flow Control section in Appendix A While error control is optional it should always be se...

Page 31: ...this adapt iw mode if error control isn t crucial ARQ Mode If the remote modem doesn 1 recognize the error control request the Courier HST hangs up Use this setting if error control is an absolute requirement To use error control for incoming calls set the modem for Auto Answer and for either M4 or M5 When calls come in the Courier HST goes off hook and responds to an error control request if one ...

Page 32: ...gnal via Pin 5 on the RS 232C interface Software the modem sends the conventional ASCII Transmit on off XON XOFF characters as follows XON XOFF Ctrl Q Ctrl S ASCII 17 Decimal 11 Hex ASCII 19 Decimal 13 Hex The ASCII characters may be user defined see S registers S22 and S23 in Appendix B 5 and the ASCII chart in Appendix B 6 or on the Quick Reference card CHE If possible use hardware control as it...

Page 33: ...ontrol characters transparent to both modems This setting is the default 17 Typing Ctrl Sl Ctrl Q causes XON XOFF signals to be sent to both the local modem and the remote system If any data is in transit before the remote system stops transmitting the Courier saves the data in its buffer This setting is espec ially useful if you want to stop the scrolling of incoming data so you can review it Whe...

Page 34: ...g When originating or answering a call the Courier and the remote modem negotiate the highest possible link rate For example if the terminal sends the AT com mand at 9600 bps and the Courier calls a modem operating at 1200 bps the Courier automatically falls back to 1200 bps The Courier notifies the terminal of the adjustment by sending the result code CONNECT 1200 The Courier readjusts to 9600 bp...

Page 35: ...trol to prevent the possibility of data loss Normal operations the link rate varies according to the connection sequence Fixed link rate the modem only connects if the remote modem is also operating at the same rate Allowable rates are as follows NI N2 N3 300 bps 1200 bps 2400 bps N4 NS N6 Reserved Reserved 9600 bps 1 Some software doesn t support a fixed terminal rate but always switches bit rate...

Page 36: ...n Pin 6 on the RS 232C interface is required on some systems to enable the modem to signal the terminal when the modem is ready to answer a call Typically DSR signaling is overridden DSR is always ON overridden This setting is the default The modem controls DSR 4 7 ...

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Page 38: ...y settings Turn the modem off The Courier HST is shipped from the factory with its software defaults stored in read only memory ROM and also in programmable nonvolatile random access memory NRAM The inclusion of NRAM allows you to program your own configuration and save the settings as your power on defaults If you store your own default software settings in NRAM the Courier loads those settings w...

Page 39: ...use the Z command to initiate the new setting s The modem stores up to four frequently called phone numbers Write the numbers to NRAM with the Zn s command where fl is position 0 through 3 ands is the number string The number string may be up to 36 characters long in cluding any Dial command options The following example includes the tone dial T and comma pause options of the Dial command The numb...

Page 40: ...meric result codes independently of the power on default VCJ Numeric Mode Numeric result codes are followed by a Car riage Return but no Line Feed as in the following ex ample where a 3 is returned for NO CARRIER ATD1234567 er becomes 3TD1234567 er V7 Verbal Mode Verbal responses are preceded and followed by a Carriage Return and a Line Feed as in the following ex ample Resu It Code Sets ATXCJ ATX...

Page 41: ... W X X X X X Wait for Answer Cu X X X X X Fast Dial X X X X I An additional group of CONNECT messages 15 17 indicates an error control connection with an HST or MNP compatible modem Seethe ARQ Result Codes An later in this section 2 Adaptive dialing causes the modem to automatically use Touch Tone dialing and if that doesn t work on the line revert to pulse dialing 3 W and are Dial options describ...

Page 42: ...t to the screen when a successful HST or MNP connec tion is established A setting of XI or higher is assumed 15 CONNECT 1200 ARQ 16 CONNECT 2400 ARQ 17 CONNECT 9600 ARQ ARQ codes are disabled Some software does not allow the ARQ result codes In this case use this setting Suppres sion of the ARQ codes doesn t affect the error control pro tocol the modem returns the standard CONNECT messages ARQ cod...

Page 43: ... for a high pitched answer tone from the other modem immediately followed by data signals called a carrier These signals must occur before a data link is established If someone answers the phone or if the line is busy the modem sends the message NO CARRIER to your screen after 30 seconds If you listen to the speaker you can respond immediately instead of waiting for the modem to time out For examp...

Page 44: ... time Kf J Call Duration Mode the modem times each call from CON NECT to NO CARRIER and stores the information until the next connection or the modem is reset At ATI3 er the modem displays the call s duration If you wish you can maintain a call log by printing this information after each call This setting is the default K 1 Real Time Mode the clock operates as a real time clock regardless of the p...

Page 45: ... the default setting Nondestructive expedited the modem retains buffer data but immediately sends a Break to the remote modem Nondestructive unexpedited send Break in sequence the modem transmits any buffer data received before the Break sends the Break and then sends any subsequent input from the computer or terminal The S Registers are used to set various timing parameters and other operations i...

Page 46: ...e of the other modem before calling However if the link rate is set to the default N0 and the Courier HST tries to connect with a modem operating at a lower rate the Courier falls back to the rate of the remote modem This applies to both Originate and Answer Modes See the discussion under Data Rate Commands in Chapter 4 Always set the Courier HST for error control M4 the default or MS for 9600 bps...

Page 47: ...1 R DS11 Redialing A A Canceling dialing any key When the Dial command is issued the modem goes off hook the equivalent of your picking up the phone then enters Originate Mode and dials the number sequence that follows The modem also executes any other commands or options included in the command line The command string may include up to 40 characters plus the AT prefix and Carriage Return Enter ke...

Page 48: ...e modem remains set for Touch Tone dialing until it is reset or the ATP pulse command is reissued When any of the X2 through X7 options is in effect and you don t issue a dialing type in the Dial string the Courier uses tone dialing which is faster than the default pulse type However if the phone company central office doesn 1 have Touch Tone detection equipment the modem can not break dial and co...

Page 49: ...k up your phone receiver so you can talk to the other party and tell the modem to hang up ATH er Similarly you can call a recorded weather or other service Have the modem Dial listen to the recording over the modem s speaker and when you re finished tell the modem to hang up Another example is an information or other service that requires a Touch Tone entry of an ID as part of the log on procedure...

Page 50: ...lashes the switch hook i e goes off hook 0 5 seconds on hook for 0 5 seconds and off hook again to dial the specified exten sion The following example includes instructions to return to Command Mode and to hang up H ATDT 1234 H er This command is useful in situations where you must wait for a second dial tone before entering a password for exam ple when using MCI Sprint or other long distance serv...

Page 51: ...a banking service Each occurrence of a in the example indicates a five second wait for silence after taped requests from the bank for the labeled items The transaction code might be used for example to request an account balance Password ATX4 DT1234567 u 12345 u 6789 Ca 2 Account Transaction Code If the necessary conditions don t occur no rings or no following five seconds of silence the modem tim...

Page 52: ...r If you know the modem you re calling is frequently busy include the Repeat command in the Dial string as in either of the following examples AT OT 1234567 er AT OT 1234567 er The modem enters Repeat Mode dials the number waits the default 30 seconds for a carrier and hangs up Then after a two second pause it redials The cycle continues until the modems connect or the modem reaches a maximum of l...

Page 53: ...t with a Dial command to dial the call s destination The spaces are included for readability AT DS1 D 312 5556789 er This command sets the ratio of the off hook on hook make break interval when the modem pulse dials The factory set default sets the modem for use in North America The ratio must be changed if the modem is used in the British Com monwealth with the exception of Canada North America m...

Page 54: ...ant the modem to execute commands and return online See the O command below Keep in mind however that this only applies to Normal Mode connections If you want an automatic disconnect when you issue set switch 9 UP An advantage of this is that you re not likely to inadvertently run up an all night phone bill For unattended modem operations in rare instances the modem may fail to recognize the escap...

Page 55: ...lue See the S Register summary in Appendix 8 5 ATSO er When the modem senses a call coming in it sends the result code RING to your screen goes off hook and sends the remote modem a high pitched answer tone If there is no Carrier Detect within 30 seconds the modem hangs up and sends the NO CARRIER result code If the connection is made the modem sends a CONNECT result code When the call is disconne...

Page 56: ...erica most modems adhere to the CCITT V 25 standard and send out a 2100 Hz lone followed by a 2250 Hz tone If you re expecting an overseas call set the Courier to use the CCITT answer tone The setting won t affect the modem s ability to connect with a domestic modem although it will take slightly longer to con nect with a calling modem B CCITI answer sequence used to answer calls originating outsi...

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Page 58: ...read only memory ROM and returns the result to the screen This function is used only in factory testing The modem should always read the same number 2 The modem performs a test of its random access memory RAM and returns either the OK 0 or ERROR 4 result code foll owed by OK when the test is completed You may want to use this command as a checkpoint if the modem appears to be malfunctioning 3 The ...

Page 59: ...The modem displays the configuration stored in nonvolatile random access memory NRAM at i 5 USRohotics Courier HST NHAM Settings Oi DIAL TONE M t X t f t B l BAUD 80 PARITV N WORDLEN 8 Al Bl H0 HB 10 M4 NB P8 HZ S0 YI S02 843 S03 013 S84 010 S05 008 S86 001 S07 030 S08 001 S89 006 s10 001 s11 010 s1z 0se s11 000 S19 000 SZI 000 S22 017 SZJ 019 STORED PHONE 10 1 312 982 5892 11 12 13 Figure 7 2 Sam...

Page 60: ...t user programmable can be queried for the following diagnostic information S 77 The reason for a Link Disconnect when two modems try to make an ARQ connection and fail or when the remote modem disconnects from an ARQ session S 17 is used for debugging purposes If you re having an ARQ compatibility problem and call USRobotics Technical Support Depart ment you may be asked to check S17 S20 The reas...

Page 61: ... 0 Ca ll Durd ti on Mode Bn n 0 CCI TT Ans wer Se ljuence n 1 Reo I Ti r tie CI ee k Mode u t Be 11 An swer Sequence Mn n B Speaker Off Cn n 8 Tre1 ns it ter Off n 1 Sped ker On Until CD n 1 Tr 11 ns rt it ter On tFZ Speaker AIWdlJS On Dn Dial Te epho ne Nu her n 3 Speitker Off During Di d n B 91 TPR W 1 Retur n On Line DS n Di iii Sl ord Phc i ne Hu ber Qn n 8 Resu It Codes Sent D HELP Di a l Co ...

Page 62: ...ered n 1 Destruct ive Exped i ted n 3 HP Enq Ack Ho s t Mode ncZ Nondestruct ive E q 1ed i ted 0 4 HP Enq Ack Tera ind I Node n 3 Nondestruct iv e Unexp e d i ted H11 n fl Nor l Mode Zn s Store Phone Nu ber 4 AHQ i Nor dl Mode Zn Query Phone Nu11ber n S ARQ Mode OK Figure 7 5 Ampersand Commands HELP Screen At ATS the Courier displays a summary of the S register functions ts HELP S Register Functio...

Page 63: ...L S lo Stop CTRL C to C ocei I 8 9 Digits to Di ct I Aux I i ary Di 9 its Tone Oi ding OH Pu Ise Did Ii 119 Cal I an Or i ginate Only Mode11 Pause He din in Co dnd Mode Us e to Di d Alpha Plione l s Wait for 2nd Dial Tone X3 X6 Wait for an Answer X3 X Flash Switch Hoo Figure 7 7 Dial Command HELP Screen ...

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Page 66: ...1 Front End Indicators B 2 1 DIP Switch Summary B 3 1 Default Settings B 4 I S Register Summary B 5 1 ASCII Chart B 6 1 APPENDIX C Alphabetical Command Summary C 1 APPENDIX D Problems and Solutions D 1 If You Still Have Problems D 3 APPENDIX E Additional Operational Information E 1 Using Both Voice and Data Communications E 1 1 High Speed Low Speed Protocol E 2 1 Retrain Sequence E 3 1 PBX Dedicat...

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Page 68: ...ut is about 1100 characters per second when the link speed is 9600 bps and the terminal transmits to the modem at 19 2k bps The design of the HST protocol builds on and enhances previous protocols by integrating much of the additional error control information overhead within the data blocks instead of transmitting separate ARQ data For optimal throughput at 2400 200 bps under MNP see Service Clas...

Page 69: ...te their MNP connection each indicates its highest service level and they agree to operate at the highest level possible Service Class 3 2 or 1 The Courier HST indicates Class 3 in its MNP error control parameter If necessary the Courier automatically drops back to meet the requirements of the other modem During an ARQ connection the transmitting modem divides the data it receives from the compute...

Page 70: ...2 and monitors how full the the buffer is Transmit Data I __ _ I Data Link ll i Modem Computer Terminal Figure A 2 Flow Control Buffer Received Data The buffer is used to store data transmitted to the modem from the computer or terminal as well as data received over the data link Separate commands instruct the modem for Transmit Data flow control Hn and Received Data flow control In Rn Chapter 4 c...

Page 71: ...cks up in the buffer As the buffer approaches capacity DCE I signals DTE I to stop sending data DCE I also retransmits the specified frame and con tinues transmitting When enough data is transmitted to half empty the buffer DCEI signals DTE to resume sending data As mentioned in Chapter 4 Transmit Data flow control is also essential if the DTE is set to send to the modem at a rate higher than the ...

Page 72: ... reason is explained in Chapter 4 R2 If DTE is a computer that supports the Request to Send RTS signal at the RS 232C interface RTS is lowered to signal the modem to stop passing on received data 11 XON XOFF Figure A 4 Received Data Flow Control Be sure to review Chapters 3 and 4 before using the error flow control commands A 5 ...

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Page 74: ...NTS COURIER HST APPENDIX B SUMMARIES AND TABLES B 1 The RS 232C Interface with Pin Definitions B 2 Front End Indicators B 3 DIP Switch Summary B 4 Default Settings B 5 S Register Summary B 6 ASCII Chart B 1 ...

Page 75: ...TIONS Pin Circuit Function Signal Flow 2 BA Transmit Data Terminal Modem 3 BB Receive Data Terminal Modem 4 CA Request to Send Terminal Modem 5 CB Clear to Send Terminal Modem 6 cc Data Set Ready Terminal Modem 7 AB Signal Ground Terminal _ Modem 8 CF Carrier Detect Terminal Modem 12 SCF Speed Indicate Terminal Modem 20 CD Data Terminal Ready Terminal Modem 22 CE Ring Indicate Terminal Modem NOTE ...

Page 76: ...shes when a data bit is received by the Courier from the phone line or when the modem is sending result codes to the terminal or computer Flashes when a data bit is sent to the Courier by the terminal or computer ON when the DTR override DIP switch I is ON DOWN ON if DIP switch I is UP and the modem receives a Data Terminal Ready signal from the ter minal or computer via RS 232C Pin 20 ON when the...

Page 77: ... command to initiate the new settings The remaining hard ware switches are automatically operative when set UP or DOWN DIP SWITCHES UP OFF OPEN DOWN ON CLOSED Factory Switch Setting DOWN 2 UP 3 DOWN 4 UP 5 DOWN 6 DOWN 8 3 1 Function Data Terminal Ready Override UP DTR normal RS 232C Pin 20 controls modem DOWN DTR always ON override Verbal Numeric Result Codes UP Verbal word messages DOWN Numeric c...

Page 78: ... Mode Normal Mode Escape Code Operations UP When escape code is sent modem hangs up returns to Command Mode displays NO CARRIER DOWN When escape code is sent modem retains connec tion returns to Command Mode displays OK NOTE Under error control modem always hangs up at Power on Software Defaults UP Load from NRAM DOWN Load factory settings from ROM RS 232C Modem Terminal Interface UP Normal assign...

Page 79: ...M settings are the same as the factory settings Factory Setting Normal error control modes M4 Normal ARQ Display of error control response codes Al Enabled Transmit data flow control H0 Disabled Received data software flow control I0 Disabled Received data hardware flow control RI Ignore RTS Terminal to modem speed B0 Follow connection rate Link speed modem to modem N0 Variable link operations Dat...

Page 80: ...me sec S6 2 Carrier wait time sec S7 30 Dial pause reexecute time sec S8 2 Carrier Detect time I I 0th sec S9 6 Carrier loss wait time I 10th sec SlO 7 Touch Tone duration spacing msec SI I 70 Escape code guard time 1150th sec Sl2 50 Bit mapped functions S Register 13 Sl3 0 Inactivity hang up timer S register 19 S19 0 Received break length 10 msec units S21 10 XON character ASCII S22 17 XOFF chara...

Page 81: ... stores the number of rings from an incom ing call 43 13 10 8 2 30 2 Stores the ASCJI decimal code for the escape code charac ter Default character is A value of 128 255 disables the escape code Stores the ASCII decimal code for the Carriage Return character Stores the ASCJI decimal code for the Line Feed character Stores the ASCII decimal code for the Backspace character A value of 128 255 disabl...

Page 82: ...e values in the Value column For example ATS13 20 enables bits 2 value 4 and 4 value 16 Bit Value Result 0 I Reserved 2 3 4 5 6 7 Reserved Reserved 2 4 8 16 32 64 128 Reverse normal Auto Answer operation on incoming RING enter Originate Mode and look for Answer tone Disable 250 msec pause before result code display When DTR goes from low to high Auto Dial the number stored in NRAM at position 0 At...

Page 83: ... SIS Reserved Sl9 0 Sets the duration in minutes for the Inactivity Timer The timer is activated when there is no activity on the phone line At the timeout the Courier hangs up S20 0 Stores the reason for the NO CARRIER result code At ATS20 the modem returns one of the following codes 0 Key press abort I DTR dropped 2 Escape code issued 3 Loss of Carrier 4 Inactivity timeout 5 Automatic hangup wit...

Page 84: ... SYN 54 36 6 86 23 17 ETB 55 37 7 87 24 18 CAN 56 38 8 88 25 19 EM 57 39 9 89 26 1A SUB 58 3A 90 27 18 ESC 59 38 91 28 1C FS 60 3C 92 29 10 GS 61 30 93 30 1E RS 62 3E 94 31 1F us 63 3F 95 HEX CHAR 40 41 A 42 B 43 C 44 D 45 E 46 F 47 G 48 H 49 I 4A J 48 K 4C L 4D M 4E N 4F 0 50 p 51 Q 52 R 53 s 54 T 55 u 56 V 57 w 58 X 59 y 5A z 58 5C 5D J 5E 5F COURIER HST APPENDIX B 6 ASCII CHART DEC HEX CHAR 96 ...

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Page 86: ...in the command to hang up ATH er is the equivalent of ATH0 er BASIC COMMAND SET Function See the Extended Command Summary that follows this Basic Set Force Answer Mode when the modem hasn t received an incoming call Reexecute the last issued command one time A doesn t take the AT prefix or a Carriage Return Reexecute the last issued command continuously until can celed by pressing any key Dial str...

Page 87: ...h X3 or higher Reverse frequencies DSn Dial the phone number stored in NRAM at position n n 0 3 En Fn Hn C 2 E0 E1 Command Mode local echo display of keyboard commands ON OFF DIP switch 4 is factory set to Command Mode echo ON Local echo OFF Local echo ON Online local echo of transmitted data ON OFF Sometimes referred to as the Duplex setting F0 Local echo ON Sometimes called Half Duplex Modem sen...

Page 88: ...l3 Default Return actual time at ATI3 Clock is set using ATI3 HH MM SS Kl Monitor speaker control Speaker always OFF Speaker ON until carrier is established Default Speaker always ON Speaker ON after last digit dialed and until carrier is established Return online after command execution Pulse dial Default Quiet Mode result codes displayed suppressed DIP switch 3 is factory set to display result c...

Page 89: ... X X X 2 RING X X X X X X X X 3 NO CARRIER X X X X X X X X 4 ERROR X X X X X X X X 5 CONNECT 1200 X X X X X X X 6 NO DIAL TONE X X X X 7 BUSY X X X X X 8 NO ANSWER X X X X X 9 Reserved 10 CONNECT 2400 X X X X X X X 11 RINGING X X X 12 VOlCE X X 13 CONNECT 9600 X X X X X X X Functions Adaptive Dialing X X X X X X Wait for 2nd Dial Tone W X X X X X Wait for Answer cl X X X X X Fast Dial X X X X MHE ...

Page 90: ...O CARRIER result code Normal Connection DIP Switch 9 DOWN ON Factory setting Retains phone line connection Sends OK result code DIP Switch 9 UP OFF Hangs up Sends NO CARRIER result code Repeat the command continuously until canceled by pressing any key If used in a Dial string automated redialing terminates after ten attempts Help command summary request Help extended command summary request Help ...

Page 91: ... bps Load factory ROM settings into random access memory RAM Transmit Data flow control Flow control disabled Default Hardware CTS Pin 5 flow control Software XON XOFF flow control Hardware and software control Received Data software flow control Flow control disabled Default XON XOFF to local modem and remote system XON XOFF to local modem only Host Mode Hewlett Packard protocol Terminal Mode Hew...

Page 92: ...monwealth make break ratio excluding Canada Received Data hardware flow control RTS Pin 4 Reserved Ignore RTS Default Received data output to terminal on RTS high used only if terminal supports RTS Pin 4 Data Set Ready DSR Pin 6 override DSR override always ON Default Modem controls DSR Write current settings to nonvolatile random access memory NRAM Break handling Destructive Breaks clear the buff...

Page 93: ...COURIER HST Zn s Zn C 8 Write the following Dial string s to NRAM at position n n 0 3 Maximum length of s is 36 characters Display the phone number stored in NRAM at position n ...

Page 94: ...e using a computer make sure it is in Terminal Mode 3 Check to see that your terminal or software is set to the correct bit rate and word length 7 bits with or without a parity bit or 8 bits and no parity If you re using a computer make sure your software is set to the correct communications port 4 Check that DIP switch 3 is DOWN for result code display and that DIP switch 2 is UP for verbal resul...

Page 95: ... the Quiet Mode command ATQ 1 er should solve the problem 1 Check to make sure the proper bit rate word length parity and number of Stop bits have been selected 2 If that doesn t correct the problem it s likely that the quality of the phone connection is poor and that the other modem is missing the signals your modem is transmitting The variable quality of phone line connec tions may be due to any...

Page 96: ... might try using a different service Make sure both modems are set at the same bit rate word length parity and number of Stop bits The modem s online local echo is probably ON If the modem s in Normal Mode return it to Command Mode use when it s convenient and then type ATF1 er If the modem s in an ARQ connection the only alternatives are to put up with the problem until you disconnect or to hang ...

Page 97: ...procedure a Ship the unit postage paid in its original container If the original container is not available pack the modem carefully in a strong box of corrugated cardboard with plenty of packing material b Be sure to include your RM A number inside the pack age along with your name and address Put your return address and your RMA number 0 11 the shipping label as 11 ell c Ship the well packed mod...

Page 98: ...DIX E ADDITIONAL OPERATIONAL INFORMATION E 1 Using Both Voice and Data Communications E 2 High Speed Low Speed Protocol E 3 Retrain Sequence E 4 PBX Dedicated Line and Leased Line Operations E 5 Hewlett Packard Installations E 1 ...

Page 99: ...et to X2 X4 X6 or X7 or it will return the NO DIAL TONE result code and hang up 2 The other party should then have the remote modem go off hook in Answer Mode The following command is used to do this ATA er 3 Now both of you can hang up your respective phones while the two modems establish the data link They will maintain the link until one of you gives your modem a command to disconnect Either pa...

Page 100: ...odes or unless the call is at 300 bps an ARQ Mode equivalent CONNECT CONNECT 1200 CONNECT 2400 CONNECT 9600 300 bps 1200 bps 2400 bps 9600 bps The modem sends the result code at its previous rate Then it switches to the new connection rate If your computer doesn t switch rates and you want to pro gram it to do so use the example on the next page as a guide It demonstrates the occurrence of the CON...

Page 101: ...ONNECT 9600 2400 9 Data link is established 9600 Data transfer takes place 10 Data session is over Call is ended loss of carrier NO CARRIER 9600 I The modem is powered on and is operating at 9600 bps If the software is then set to 19 2k bps and an AT com mand sent the DTE DCE rate would be 19 2k bps 2 A 300 bps modem calls The Courier senses the incom ing signal and sends the messages RING and CON...

Page 102: ...session is terminated the modem sends the message NO CARRIER at 2400 bps 8 A 9600 bps call comes in The modem responds RING and CONNECT 9600 These message are sent at the current bit rate of 2400 bps 9 The computer receiving the CONNECT 9600 message adjusts accordingly to the higher bit rate The modem also shifts to 9600 bps 10 The 9600 bps data session is terminated the modem sends the message NO...

Page 103: ...liability The procedure is essentially transparent to users The following is an example of retrain events I The Courier HST s receiver sensing a need to retrain clamps RX to MARKs 2 The remote modem after receiving about 100 ms of analog signals a pattern of f is usually output clamps RX data to MARKs 3 After the training sequence approximately one second the Courier unclamps RX data and turns HS ...

Page 104: ...Dial command The off hook indicator on the PBX should show the exten sion as busy if DIP switch 7 is DOWN To call another modem on the system use the Dial com mand described in Chapter 6 with the number of the exten sion you wish to call If set to Auto Answer the called modem automatically answers on the incoming ring The off hook indicators on the PBX should show both extensions as busy if DIP sw...

Page 105: ...in Originate Mode with the manual Dial command ATD er NOTE Be sure the modem is not set to X2 X4 X6 or X7 or it will return the NO DIAL TONE result code and hang up 3 Then put the answering modem in Answer Mode with the manual Answer command ATA er NOTE If there is an interruption in the communications link a strike to the line due to weather or some other problem repeat steps 2 and 3 to reestabli...

Page 106: ...eeded up thereby enabling HP terminals to achieve high speeds on dial up lines Special Received Data flow control settings the I command are required for HP users Follow these guidelines 1 Use one of the I settings given here for both Normal and error control ARQ sessions i e for all M settings 2 Do not use a software setting for Transmit Data flow control Set the modem only to H0 or HI according ...

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Page 108: ...ft Keying FSK USRobotics HST error control at 9600 bps Microcom Networking Protocol MNP Service Classes 1 2 3 at 2400 1200 bps RS 232C terminal modem interface Superset of industry standard AT command set and DfP switches RJI I RJl 2 RJl 3 RJ41 RJ45 phone jacks Full half duplex on 2 wire dial up dedicated or leased phone lines demand driven high speed channel turnaround 300 1200 2400 9600 bits per...

Page 109: ...al Repeat commands 2 sec Remote Carrier Detect before local recognition 0 6 sec Disconnect at loss of carrier 0 7 sec Escape code guard time I sec Touch Tone duration spacing 70 Ms Break length to DTE 100 Ms Modem self testing 0 Data Mode Inactivity Timer 0 disabled Externally accessible Values in parentheses are factory settings UP OFF open DOWN ON closed Volume control DTR override DOWN Result c...

Page 110: ...esult code sets Result code display ON OFF Speaker OFF ON until CD ON through CD and data transmission ON after last digit dialed until CD Command Mode online toggle Voice data communications Adaptive dialing Fast dialing search for dial tone Wait for second dial tone then continue Wait for answer then continue Dial alphabetic string Dial one of four phone numbers stored in NRAM Flash switch hook ...

Page 111: ...nswer Mode 2400 Hz Bell 103 Originate Mode Mark 1270 Hz Space 1070 Hz Answer Mode Mark 2225 Hz Space 2025 Hz USR HST Originate Mode 1800 Hz Answer Mode 350 Hz V 22bis Bell 212A Originate Mode 2400 Hz Answer Mode 1200 Hz Bell 103 Originate Mode Mark 2225 Hz Space 2025 Hz Answer Mode Mark 1270 Hz Space 1070 Hz FCC Part 68 Part 15 Subpart J Class B Domestic DOC Canada UL listed CSA approved Supply vo...

Page 112: ...f Carrier Timeout Receive Sensitivity Transmit Level Transmitter Frequency To lerance COURIER HST Disconnect Timer 0 7 sec default programmable 0 2 25 5 sec 43 dBm 9 dBm 01 Size 8 30 x 12 65 x 1 57 inches F 5 ...

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Page 114: ...utomatic retransmission of defective blocks of data See HST and MNP American Standard Code for Information Interchange A 7 bit binary code 0s ls used to represerit letters num bers and special characters such as 1 and Support ed by almost every computer and terminal manufacturer See Appendix B 6 for decimal and hexadecimal code equivalents Data transmission in which the length of time between tran...

Page 115: ...rs for example or have some other value meaningful to the computer In user docu mentation the term usually refers to 8 bit units or charac ters I kilobyte 1 024 bytes or characters 64k 65 536 bytes or characters A continuous frequency capable of being either modulated or impressed with another information carrying signal Carri ers are generated and maintained by modems via the trans mission lines ...

Page 116: ...le to exchange data over an electronic medium Data Communication or Circuit Terminating Equipment In this manual the dial up modems that establish and control the data link via the telephone network Data Terminal or Terminating Equipment The device such as a personal computer terminal or mainframe that generates or is the final destination of data Often used to describe a user installed phone line...

Page 117: ...modem to send a copy of the transmitted data to the screen of the sending computer High Speed Technology part of the trademark for USRobotics USR HST a proprietary signaling scheme design and protocol for 9600 bps modems USR HST incor porates trellis coded modulation for greater immunity from variable phone line conditions and asymmetric modulation for more efficient use of the phone channel HST a...

Page 118: ...ns which are the equivalent of manually lifting a phone receiver taking it off hook and replacing it going on hook A state in which the modem transmits at the predefined low frequency of the communications channel and receives at the high frequency The transmiUreceive frequencies are the reverse of the called modem which is in Answer Mode The transfer of data characters using parallel electrical p...

Page 119: ...ead Only Memory Permanent memory not user program mable The Courier HST s factory settings are stored in ROM and can be read loaded into RAM as an operational configuration The transfer of data characters one bit at a time sequen tially using a single electrical path See Parallel Transmission The signaling bits attached to a character before the charac ter is transmitted during Asynchronous Transm...

Page 120: ...Start and Stop bits or frame headers and trailers Compare characters per second Same as Bit Rate The international CCITT standard for modem communi cations at 2400 bps The standard includes an automatic data rate fallback to 1200 bps and compatibility with Bell 212A V 22 modems The number of bits in a character without parity start or stop bits Standard ASCII control characters used to tell an int...

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Page 122: ...s defined see Glossary rate recognition 4 5 6 1 App E 2 setting the 3 1 3 2 4 5 4 6 6 1 Break handling Y 5 8 Break length modem to terminal S21 B 5 3 COURIER HST Buffer command 6 7 flow control 3 2 4 3 A 3 Busy answer 3 4 5 4 6 6 C Calling another modem 3 l 6 1 6 8 at another extension E 4 1 Call duration reporting K 5 7 Call progress messages 5 3 5 4 Canadian certification DOC x 6 7 Carrier defin...

Page 123: ...ttings 1 W1 5 l phone numbers i Zn s 5 2 Settings status display current setting 4l 7 2 NRAM settings 5 7 2 Speaker control M 5 6 S register settings Sr n B 5 query specific register ATSr 4 1 7 3 Touch Tone pulse dial PIT 6 2 Transfer call 1 6 5 Transmit data flow control H 3 1 4 3 Verbal numeric response modes Y 5 3 Wait for second dial tone W 6 5 Wait for answer u 6 6 Write to NRAM modern settin...

Page 124: ... 5 App E 2 FCC ccrtification ix Fixed variable rates 3 3 4 5 4 6 Flow control 3 2 4 2 4 5 Frame transmission A 2 Full duplex 5 6 COURIER HST H Half duplex 5 6 Hanging up H 6 8 6 9 6 10 reasons S2ll 7 3 B 5 3 under error control 6 9 Help screens sec list under Commands Hewlett Packard installations 2 2 4 4 App E 5 HST High Speed Technology features 1 1 error control modes 3 1 4 2 Inactivity timeout...

Page 125: ...e B 4 6 link rate N 4 6 guidelines 4 6 Rate switching 1 2 3 2 3 3 4 5 App E 2 Received data flow control I R 4 5 4 6 Redial reexecute continuous A 6 7 one time Al 6 7 Remote echo 5 6 Repeat mode commands A 6 7 Requirements operating 2 l 9600 bps 3 1 MNP 3 l ventilation 2 4 Reset to NRAM defaults Z 5 2 Response time l 1 Result code sets 5 3 5 4 Retrain sequence 1 2 6 2 App E 3 Retransmission 3 2 4 ...

Page 126: ...ones dialing 6 2 timing spacing Sil B 5 2 Transmission rate 3 l 4 5 6 l App E 4 DTE interface B 3 3 4 6 link interface N 3 3 4 6 Transmit data flow control H 3 1 4 3 Trellis coded modulation 1 1 Turnaround high speed channel 1 1 3 2 u Unattended operation 6 9 6 10 V Variable fixed data rates DTE interface B 3 3 4 6 link interface N 3 3 4 6 Ventilation 2 4 Voice data communications configuring for ...

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Page 129: ...COURIER HST NOTES Printing 9 8 7 6 5 4 3 ...