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Text File | 1988-10-06 | 30.6 KB | 665 lines

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The $995.00 Courier HST offers a combination of price, performance, quality, reliability, and SPEED that no other modem can match. The Courier HST is a fully-featured modem that with special features that professional users will find ingenious and indispensable. Standard features found on the Courier HST include: * 9600 BPS -- ERROR-FREE: The Courier HST offers error-free communication at data rates up to 9600 bps. It also automatically falls back to 2400, 1200, and 300 bps to guarantee compatibility with virtually any other medium- or low-speed modem in the field. * TRELLIS-CODED MODULATION: At 9600 bps, the Courier HST employs Trellis-Coded Modulation -- a convolutional coding technique that makes data transmission less vulnerable to errors caused by phone network impairments. It can tolerate twice the telephone channel noise power as conventional modulation, so there are fewer error-control retransmissions. Trellis-coded modulation is also less susceptible to impulse type noise. * ASYMMETRIC FREQUENCY DIVISION: At top speed, data flows in one direction at 9600 bps and at 300 bps in the other. The modems automatically switch the high-speed channel on demand, i.e., depending on which transmitter has the most data to transmit. In practice, the modems seldom need to reverse channels, since the asymmetric design reflects typical communication sessions brief messages typed at one end of the link, files sent from the other. The asymmetrical approach provides the most efficient and economical strategy for using ordinary phone channels at high speeds. * ENHANCED ERROR CONTROL: The HST error control protocol uses sophisticated error detection methods to ensure data integrity. In addition, design efficiencies have reduced the overhead (extra control information) experienced with lower-speed error control protocols. In addition, the protocol doesn't slow down on long-distance connections. The result is accuracy, greater speed and higher throughput -- approximately 11,000 bps. * SHORTER RESPONSE TIME: Most 9600 bps modems are most efficient for file transfers. You'll find that the Courier HST offers faster response times for interactive sessions as well. * THE COURIER PRODUCT FAMILY: In addition to the Courier HST's new features, the modem incorporates the same popular capabilities of other products in the Courier line: * MNP ERROR CONTROL: At 2400 and 1200 bps, the Courier HST implements MNP, a sophisticated error and data flow control protocol that ensures error- free data transfer. The protocol is especially useful when files containing numeric data are being transferred, or computer programs, in which a single incorrect character can cause failure. * INACTIVITY TIMER: You can set the modem to automatically hang up after a specified number of minutes if there is no activity on the phone line. * DATA RATE CONVERSION: You can set your computer's serial port to operate at a specific data rate (say 19,200 bps) and the modem will perform a data rate conversion for whatever speed modem you call. That means no more software problems with automatic baud rate detection. * BOTTOM PANEL REFERENCE: On the bottom of the Courier case, you'll find a command summary and other handy reference information, as well as the bank of Dual In-Line Package (DIP) switches used to tailor operations to your requirements. * CALL DURATION REPORTING: The Courier HST records the duration of your calls in hours, minutes, and seconds. This feature enables you to display and print an audit of your calling activities. You can optionally use the modem clock as a real-time clock. * CALL PROGRESS DETECTION: The Courier HST has additional call- progress result codes (screen messages) that let you know when a line is busy, a person rather than a modem has answered the phone, there is no dial tone, or the distant phone is ringing. * MODEM SETTINGS DISPLAY: On command, the modem sends a display of its current settings, a handy way to check your transmission rate, S-registers, and other operational controls. * HELP SCREENS: You can also display screens that summarize the command set, S-register functions, and Dial command options. * REPEAT COMMAND: You can have the modem continuously repeat a command until instructed otherwise. This is especially usefule in dialing services whose lines are often busy. * QUOTE MODE: You can put the modem in Quote Mode * ADAPTIVE DIALING: You can set the Courier HST so that it auto- matically uses touch-tone dialing. If tone dialing doesn't work on the line, the modem automatically switches to the slower type, pulse (rotary). * DATA RATE FALLBACK: In addition to automatically adjusting to the bit rate of incoming calls (0-300, 1200, 2400 bits per second, or bps), the Courier HST incorporates the V.22bis fallback recommendation when dialing. If the called modem operates at 1200 bps, the Courier HST automatically drops back to 1200 bps. * AUTOMATIC RETRAINING: The Courier HST observes the V.22bis retrain sequence, which enables modems communicating at 2400 bps to compensate for certain problems that may affect data reliability. _____________________________________________________________________________ STANDARDS COMPLIANCE ______________________________________________________________________________ Bell 103/113 at 300 bps Bell 212A at 1200 bps CCITT V.22bis at 2400 bps USR-HST at 9600 bps. FCC Part 15#: CJE794COURIERHST Ringer Equivalence: 0.4B FCC Part 68#: CJE794-11323-DM-E Canadian DOC LN#: 38B ______________________________________________________________________________ AT COMMANDS SUPPORTED ______________________________________________________________________________ COMMAND DEFAULT FUNCTION & DNA See the Extended Command Summary that follows this basic set A DNA Forces Answer Mode A/ DNA Reexecute last command (does not require "AT" or <CR> Any Key DNA Terminate current dialing operation resulting from issued dial command AT DNA Attention. MUST precede all commands except A/ and +++. Bn B0 U.S./CCITT answer sequence B0 U.S. answer sequence (Bell) B1 CCITT (overseas) answer sequence Cn C1 Set additional modem to Receive-Only C0 Transmitter disabled C1 Transmitter enabled D Pulse Dial the number that follows and enter Dial originate mode; use with any of these options: S Dial the number (four available) stored in NRAM P Pulse (rotary) dial (0-9) -- DEFAULT T Touch-tone dial (0-9, #, *) , (Comma) Pause two seconds, then continue ; (Semi-colon) Return to command mode after dialing R Reverse Originate and Answer Frequencies " Dial the letters that follow ! Transfer call (flash the switchhook) W Wait for second dial tone (with X3 or higher) @ Wait for answer (with X3 or higher) E E0 Command mode local echo ON/OFF E0 Echo OFF E1 Echo ON F F1 Online local echo ON/OFF F0 Echo ON F1 Echo OFF Hn H0 ON/OFF hook control H0 Hang up (go on hook) H1 Go off hook In DNA Inquiry I0 Display product code I1 Display memory (ROM) checksum I2 Run Memory (RAM) test I3 Return call duration or real time (see Kn) I4 Return current modem settings I5 Display NRAM settings I6 Display link diagnostics Kn K0 Modem clock operation : call duration or real time K0 Return call duration at ATI3 K1 Return actual time at ATI#. Clock is set using ATI3=HH:MM:SS K1 Mn M1 Audio Monitor (speaker) control M0 Speaker always OFF M1 Speaker ON until "CONNECT" M2 Speaker always ON M3 Speaker ON after last digit dialed and until carrier is established. O DNA Toggle back online after command execution P Pulse Pulse (rotary) Dial Qn Q0 Enable/Suppress result codes Q0 Result codes displayed Q1 Result Codes suppressed Sr=n DNA Sets S-Register r to value n where n is a decimal number from 0 to 255 Sr? DNA Query value of register r T Pulse Touch-tone dial Vn V1 Verbal/numeric result codes V0 Numeric result codes V1 Verbal result codes Xn X1 Result code set X0 Basic 0-4 X1 Extended 0-5 X2 Advanced (full) set plus fast dialing (immediately on dial-tone detect) and repeat dialing up to ten times RESULT CODES / SPECIAL DIALING FUNCTIONS OPTIONS TABLE RESULT CODES X0 X1 X2 X3 X4 │ X5 │ X6 | 0/OK X X X X X X X 1/CONNECT X X X X X X X 2/RING X X X X X X X 3/NO CARRIER X X X X X X X 4/ERROR X X X X X X X 5/CONNECT 1200 X X X X X X 6/NO DIAL TONE X X X 7/BUSY X X X X 8/NO ANSWER (requires @, replaces 3/NO CARRIER) X X X X 10/CONNECT 2400 X X X X X X 11/RINGING X X 12/VOICE X X 13/CONNECT 9600 X X X X X X 15/CONNECT 1200/ARQ X X X X X X 16/CONNECT 2400/ARQ X X X X X X 17/CONNECT 9600/ARQ X X X X X X SPECIAL DIALING FUNCTIONS Adaptive Dialing X X X X X Wait for 2nd Dial Tone (W) X X X X Wait for Answer X X X X Fast Dial X X X Z DNA Reset modem to factory defaults. +++ DNA Disconnect or return to command mode. Must be preceded and followed by at least one second of no data entry/transmission; does not take AT or <CR>. ARQ Connection -- hangs up, sends NO CARRIER result code Normal connection -- performs function depending on setting of DIP switch 9 > DNA Repeat command string until canceled by pressing any key. If used in Dial String, automated redial terminates after ten attempts. $ DNA Help command summary request. D$ DNA Help Dial command summary request. S$ DNA Help S-register summary request. &$ DNA Help extended command summary request. <Ctrl> C DNA Cancel display of Help screens. <Ctrl> K DNA Cancel display of Help screens. <Ctrl> S DNA Stop/restart display of Help screen. ______________________________________________________________________________ EXTENDED COMMAND SET ______________________________________________________________________________ &An &A1 Enable/disable /ARQ result codes &A0 Suppress /ARQ result codes &A1 Display /ARQ result codes &Bn &B0 Data rate, terminal to modem (DTE/DCE) &B0 Detect DTE rate from AT command (default) &B1 300 bps &B2 600 bps &B3 1200 bps &B4 2400 bps &B5 4800 bps &B6 9600 bps &B7 19200 bps &F DNA Load factory settings into RAM &Hn &H0 Transmit Data flow control &H0 Flow control disabled &H1 Hardware (CTS, Pin 5) flow control &H2 Software (XON/XOFF) flow control &H3 Hardware and software flow control &In &I0 Received Data flow control &I0 Flow control disabled &I1 XON/XOFF to local modem and remote system &I2 XON/XOFF to local modem only &I3 Emulate HP terminal ENQ/ACK for connection to HP Host &I4 Emulate HP host for connection to HP terminal &Mn &M4 Normal or Error Control Modes &M0 Normal Mode &M4 Normal/ARQ Mode -- normal if ARQ connection cannot be made &M5 ARQ Mode -- hang up if ARQ connection cannot be made &Nn &N0 Data Rate, data link (DCE/DCE) &N0 Normal Link Operations &N1 300 bps &N2 1200 bps &N3 2400 bps &N4 Reserved &N5 Reserved &N6 9600 bps &Pn &P0 &P0 Use North American make/break ratio &P1 Use British Commonwealth make/break ratio (excluding Canada). &Rn &R1 Received Data hardware (RTS, Pin 4) flow control &R0 Reserved for future use &R1 Ignore RTS default &R2 Received data output on RTS high; used only if terminal equipment supports RTS (Pin 4) &Sn &S0 Data Set Ready (DSR< Pin 6) override &S0 DSR override (always ON) &S1 Modem controls DSR &W DNA Write current settings to nonvolatile random access memory (NRAM) &Y &Y1 Break handling. Destructive breaks clear the buffer; expedited Breaks are sent immediately to the remote system. &Y0 Destructive; don't send break &Y1 Destructive, expedited &Y2 Nondestructive, expedited &Y3 Nondestructive, unexpedited; modem sends Break in sequence with data received from terminal equipment &Zn DNA Store the phone number that follows in NRAM at position n (n = 0 - 3) ______________________________________________________________________________ THE RESULT CODES ______________________________________________________________________________ NUMERIC/VERBAL CODE MEANING 0/OK Command has been executed. 1/CONNECT Connection successfully made; if X1 or X2 is set, connection is at 300 bps. 2/RING Incoming call when modem set to Auto Answer. 3/NO CARRIER Hung up because attempt to connect failed or call was disconnected. 4/ERROR Invalid command. 5/CONNECT 1200 Connection successfully made at 1200 bps. 6/NO DIAL TONE Hanging up; no dial tone. 7/BUSY Hanging up; busy signal. 11/RINGING Dialed and remote phone is ringing. 12/VOICE Hanging up; voice answered. 13/CONNECT 9600 Connection successfully made at 9600 bps. 15/CONNECT 1200/ARQ MNP connection successfully made at 1200 bps. 16/CONNECT 2400/ARQ MNP connection successfully made at 2400 bps. 17/CONNECT 9600/ARQ HST connection successfully made at 9600 bps. ______________________________________________________________________________ S-REGISTERS SUPPORTED ______________________________________________________________________________ REGISTER DEFAULT FUNCTION S0 S0=0 Sets the number of rings on which to answer when or DIP #5 in Auto Answer Mode S1 S1=0 Counts and stores the number of rings from S2 S2=43 Sets the ASCII decimal code for the escape code character. Default character is "+". A value of 128-255 disables the escape code. S3 S3=13 Sets the ASCII decimal code for the Carriage Return character S4 S4=10 Sets the ASCII decimal code for the Line Feed character S5 S5=8 Sets the ASCII decimal code for the Backspace character. A value of 128-255 disables the backspace key's delete function. S6 S6=2 Sets the number of seconds the modem waits before dialing. If set below two, the modem resets S6 to 2, due to phone company limitations. If the modem is set to X2, the modem ignores S6 and dials as soon as it detects a dial tone (fast dial) S7 S7=30 Sets the number of seconds the modem waits for a carrier. May be set for much longer duration if, for example, the modem is originating an international connection. S8 S8=2 Sets the duration , in seconds, for the pause (,) option in the Dial command S9 S9=6 Sets the required duration of the remote modem's carrier signal, in tenths of a second, before recognition (Carrier Detect Time) S10 S10=7 Sets the duration, in tenths of a second, the modem waits after loss of carrier before hanging up. While we don't recommend use of call waiting on data lines, if you use call waiting you may want to set this register higher to prevent the modem from interpreting a signal for a second call as a disconnect from the remote modem. S11 S11=70 Sets the duration and spacing, in milliseconds, of dialed Touch-Tones. S12 S12=50 Sets the duration, in fiftieths of a second, of the guard time for the escape code sequence. Must be value between 1 and 255. S13 Bit-mapped register. By default, the bits are set to zero (off). Select the bit(s) you want on, and set S13 to the total of the values in the "Value column. For example, ATS13=20 enables bits 2 (value = 4) and 4 (value = 16). Bit Value Result 0 1 Reserved 1 2 Reverse normal Auto Answer operations: on incoming RING, enter Originate Mode and look for Answer tone 2 4 Disable 250 millisecond pause before result code display 3 8 Auto Dial: When DTR goes from low to high, automatically dial the number stored in NRAM (execute DS) 4 16 At power on or reset, automatically dial the number stored in NRAM (execute DS) 5 32 Reserved 6 64 Disable MNP Service Class 3 (used for testing Service Class 2) 7 128 Watchdog hardware reset, same as power on (used in factory testing) S14 DNA Returns product code S16 S16=0 Modem self-test. Set to 0 for Data Mode; set to 1 for Analog Loopback Test S16 = 0 Data Mode (no testing) = 1 Analog Loopback = 2 Dial Test = 4 Test Pattern = 5 Analog Loopback with Test Pattern S17 S17=0 Received Link Disconnect Reason, MNP. S19 S19=0 Sets the number of minutes before the Inactivity Timer times out and the Courier hangs up S20 DNA Stores the reason for the NO CARRIER result code: 0 Key press abort 1 DTR dropped 2 Escape code (+++) issued 3 Loss of carrier 4 Inactivity timeout 5 ARQ incompatibility (&M5 Mode) 6 ARQ Retry timeout (Max. 12 tries) 7 Received Link Disconnect S21 S21=10 Sets the length of Breaks, in milliseconds, sent from the modem to the local terminal S22 S22=17 Holds the ASCII decimal code for the XON character S23 S23=19 Holds the ASCII decimal code for the XOFF character ______________________________________________________________________________ RS-232-C PIN DEFINITIONS ______________________________________________________________________________ PIN FUNCTION 1 Frame Ground (Common) 2 Transmit Data (Terminal to Modem) 3 Receive Data (Modem to Terminal) 5 Clear to Send (Modem to Terminal) 6 Data Set Ready (Modem to Terminal) 7 Signal Ground (Common) 8 Carrier Detect (Modem to Terminal) 12 Speed Indicate (Modem to Terminal) 20 Data Terminal Ready (Terminal to Modem) 22 Ring Indicate (Modem to Terminal) ______________________________________________________________________________ DIP SWITCHES ______________________________________________________________________________ SWITCH FUNCTION 1 DTR Override 2 Verbal/Numeric Result Codes 3 Display/Suppress Result Codes 4 Command Mode Local Echo 5 Auto Answer enable/disable 6 Carrier Detect Override 7 Single/multiple phone installation 8 "AT" command set recognition/Dumb mode 9 Escape Code (+++) Operations / 10/11 bits per character (NOTE: under error control, modem always hangs up at +++) 10 Power-on Software defaults (customized NRAM vs. factory ROM settings) Quad Reverses pins 2 and 3 on RS-232-C connector ______________________________________________________________________________ DIAGNOSTICS AND LED INDICATORS ______________________________________________________________________________ LEDs High Speed Auto Answer/Answer Carrier Detect Off Hook Receive Data Send Data Terminal Ready Modem Ready/Power/Analog Loopback Request to Send Clear to Send MNP Connection established Analog Loopback indicator Diagnostics Analog Loopback Self-Test Test Pattern Generation _____________________________________________________________________________ ==============================================================================