COURIER 2400 INDEX A/A1 shorting, DIP switch 7, B-3.2, E-4.1 ACK character, HP installations, App. E-5 Adaptive dialing, 1-3, 5-4, 63 Advanced result code set, 5-3--5-5 Analog loopback self-test, App. E-6 Answer mode auto answer, 6-9--6-10 rate recognition, 4-8, App. E-2 manual answer, E-1.1, E-4.1 ARQ (Automatic Repeat Request) CONNECT result codes (&A), 5-5 definition, 4-1, A-3 flow control requirement, 3-2, 4-5 mode select (&M), 3-1, 4-3--4-4 operations, A-1--A-4 timeout, retransmit maximum, 4-2 with Auto Answer, 4-4 Assembly, modem, 2-2--2-4 RS-232C cable requirements, 2-2, App. B-1 Aymmetrical modulation, 1-1, 3-2--3-3 Asterisk (*), 6-2 Asynchronous transmission, F-1, Glossary ASCII Chart, App. B-6 character definitions, 5-8, B-5.1 Audio monitor (speaker), 5-6--5-7 Auto dialing, 6-1--6-8 Help screen (D$), 7-6 quick reference, 3-1 stored phone numbers, 3-3, 6-7 Auto answering, 6-9 disabling, 6-10 number of rings on which to answer (S0), 7-3, B-5.1 with Dip switch 5, 6-9, B-3.1 Automatic Repeat Request, see ARQ Back channel, 3-2, F-1 Backspace key, ASCII definition (S5), B-5.1 Baud rate, Glossary Bits per second (bps), defined, Glossary link negotiation, 3-3, 4-8, A-1-A-3 online fallback, 1-2, 4-3, F-1 rate recognition, 4-8, 6-1, App. E-2 setting the, 3-1, 3-2, 4-8-4-9, 6-1 Break handling (&Y), 5-8 Break length, modem to terminal (S21), B-5.4 Buffers command, 6-7 COURIER 2400 flow control, 3-2, 4-5, A-4 Busy answer, 3-4, 5-4, 6-6--6-7 Calling another modem, 3-1, 6-1--6-8 at another extension, E-4.1 Call duration reporting (K), 5-7 Call progress messages, 5-3, 5-4--5-5 Canadian certification (DOC), ix, 6-7 Carrier, defined, 5-6 Carrier Detect (CD) override (DIP switch 6), 2-5, B-3.2, D-1 CCITT answer tone (B), 6-10 defined, Glossary Channel, turnaround, 1-1, 3-2, F-1 Characters per second (cps), 1-1, A-2--A-3 maximum throughput, 3-2, 4-1--4-2, 4-9 Clear to Send (CTS), 4-5, B-1.1 Clock, Courier (K), 5-7 Command length, C-1 Command mode local echo (E), 2-5, 5- Command summary, App. C Commands Adaptive dialing (X2-X6), 6- Alphabetical listing, App. C Answer mode, manual (A) analog loopback self-test, 2-6 on dedicated or leased lines, E-4.1 with voice/data operations, E-1.1 ARQ mode select (&M), 3- , 4- , 6- ARQ result codes (&A), 5-4 AT (attention), 2- Break handling (&Y), 5- Cancel dialing (any key), 6- Carriage return (), 2- ASCII definition (S3), B-5.1 to enter commands, 2- Comma (pause), 6- Command mode local echo (E), 2- , 5- Compression, data (&K), 3-1, 4-4, 4-5, A-2--A-3 Data rate select, 3-1, 3-2, 4-9, 6-1 DTE rate (&B), 4- Link rate (&N), 4- Data set ready, DSR (&S), 4-10 COURIER 2400 Dial (D), 3-1, 6-2--6-8 and return to command state (;), 6- letter strings ("), 6- Help screen (D$), 6- stored phone number (DS), 6- Disable transmitter (C), 5-7 Disconnect (H, +++), 6- Duplex, 5- Echo, local (E, F), 2-5, 5- Escape code (+++), 3- , 6- Factory settings, loading (&F), 5- Flow control, 3- , 4- received data (&I, &R), 4- transmit data (&H), 3- , 4- Hang up (H, +++), 6- ARQ mode (+++), 3- , 6- Help screens, using, 7-4 ampersand commands (&$), 7- basic commands ($), 7- dialing (D$), 7- S-register functions (S$), 7- Inquiry options (I), 7- call-duration (I3), 5- , 7- current settings display (I4), 7- link diagnostics display (I6), 7- NRAM settings display (I5), 3-3, 5-1, 7- Local echo (E, F), 2-5, 5- MNP mode select (&M), 3- , 4- Online local echo (F), 5- Pulse dial make/break ratio (&P), 6- Pulse/Touch-Tone dial (P/T), 6- Quiet mode (Q), 5- Receive only, disable transmitter (C), 5- Received data flow control (&I, &R), 4- Redial/re-execute previous command one time (A/), 3- , 6- continuous, (A>), 3- , 6- Repeat, continuous (>), 3- , 6- Reset to NRAM defaults (Z), 5- Response modes (V), 5- Result code sets (X), 5- Return online after +++ (O), 6- Reverse frequencies (R), 6- Save in NRAM modem settings (&W), 5- phone numbers (&Zn=s), 5- Settings status display current settings (I4), 7- NRAM settings (I5), 3-3, 5-1, 7- Speaker control (M), 5- COURIER 2400 S-register settings (Sr=n), B-5.1 query specific register (ATSr?), 4- , 7- Touch-Tone/pulse dial (P/T), 6- Transfer call (!), 6- Transmit data flow control (&H), 3-1, 4- Verbal/numeric response modes (V), 5- Wait for second dial tone (W), 6- Wait for answer (@), 6- Write to NRAM modem settings (&W), 5- phone numbers (&Zn=s), 5- Compatibility, 1- , 6-1, F-1 error control, 3- , 4- Compression, see Data compression Computer interface (DTE) speed select (&B), 4- Configuration, general DIP switches, 2-4, App. B-3 factory defaults, 5-2, App. B-4 interface controls, Ch. 4 internal controls, Ch. 5 NRAM options, 5-1, B-4 physical assembly, 2-2--2-4 S-registers, App. B-5 Configuration to call: HST-compatibles, 3- MNP-compatibles, 3- non-MNP compatibles, 3- CONNECT messages, 5- , 6- , App. E-2 ARQ (&A), 5- Connection rate, 4- , E-2.1 negotiation, 3- , 4- , E-2.1 Connectors, DTE interface requirements, 2- physical assembly, 2-4 RS-232C interface definitions, App. B-1 CRC, cyclic redundance checking, A- CTS, 4-5, B-1.1 Customer service, USRobotics, ii, D-4 Data compression (&K), 1-1, 3-1, 3-2, 4-4, 4-5, A-3 Data format, 6- , F-1 Data rate link negotiation, 3-3, 4-8--4-9, App. E-2 online fallback, 1-2, 4-3, E-2.3, F-1 setting the, 3-1, 3-2, 4-8--4-9, 6-1 Data rate select (&B, &N), 4-8--4-9 Data Set Ready (DSR, &S), 4-10, B-1.1 Data Terminal Ready (DTR, DIP switch 1), 2- , B-1.1, B-3.1, D-1 DCE, defined, 4-1 Defaults COURIER 2400 commands, App. C NRAM/factory, App. B-4 Diagnostics call, link, 7-3 testing, 2-5, 7-1, App. E-6 COURIER 2400 Dial, auto at a glance, 3- commands, functions, 6-2--6-8 stored phone number (DSn), 3- , 6- Dialing type adaptive, 1-3, 5-4, 6-3 pulse/tone, 6- Department of Communications (DOC), xi, 6- Digital signals, Glossary DIP switches, 2-4, App. B-3 auto answer, 6- CD override, D-1, D-2 disconnect/hang up, 6- DTR override, D-1 escape code operations, 6- load options, 3-3, 5-1, 5-2 local echo, 2- , 5- result code display (quiet mode), 5- , D- Result codes verbal/numeric, 5- RS-232C DTE interface, B-1.1 Single/multiphone installation, E-4 Disconnecting (H, +++), 6-8, 6-9 reasons (S17, S20), 7- , B-5.4 DOC, xi, 6- DTE, defined, 4- speed select (&B), 4- DSR override (&S), 4-10 DTR, Data Terminal Ready, B-1.1, B-3.1, D-1 dropping to force disconnect, 6- Dumb mode (DIP switch 8), B-3.2 Duplex, Half/Full, 5- Echo, local 2-5, 5- ENQ character, HP installations, App. E-5 Error checking, A- Error control, using, 3-1, 3-2, 4-3--4-4, 4-5, 6-1 ERROR message, 5-4 Escape code (+++), 6- changing ASCII definition (S2), 6-8, B-5.1 to terminate analog loopback test, E-6.3 Extended result code set, 5- , App. E-2 Extensions calling another, E-4.1 transferring calls to (!), 6- Factory settings, 5- , App. B-4 Fallback, data rate link negotiation, 3-3, 4-8--49, App. E-2 online, 1-2, 4-3, E-2.3, F-1 FCC certification, viii Fixed/variable rates, 3- ,4- , 4- COURIER 2400 Flow control, 3- , 4- Frame transmission, A- Full duplex, 5- Guard tone (&G), 6-10 Half duplex, 5- Hanging up (H, +++), 6- reasons (S20), 7- , B-5.3 Help screens, list under "Commands" Hewlett Packard installations, 2-2, 4-7, App. E-5 HST (High Speed Technology) features, 1-1, Glossary error control modes, 3-1, 4-3 Inactivity timeout (S19), 1- , 3- , B-5.4 Indicator lights, 2-4, App. B-2 Inquiry (I) options, 7- Installation, 2-1--2-4 International calls, 6-10--6-11 Leased line installation, operations, E-4.1 LED indicators, 2-4, App. B-2 Line feed, ASCII definition (S4), B-5.1 Link interface disconnect reasons (S17, S20), 7- , B-5.3 operations, 3- , 4- , A-1--A-3, App. E-2 speed select (&N), 4- Load number, DOC, xi Local echo, 2-5, 5- Loopback, analog, App. E-6 Manual, how to use, xii Memory, modem nonvolatile randam access (NRAM), 3- , 5- , App. B-4 random access (RAM), 7- , Glossary read only (ROM), 7- , Glossary MNP, Microcom Networking Protocol, 1- , 4-1. App. A (also see ARQ) Service levels, A-1--A-3 Modem defaults, App. B-4, App. C defined, Glossary installation, 2-2--2-4 problems and solutions, App. D repair, viii, D-3 Modulation, 1-1, F- Multiphone installations (DIP switch 7), B-3.2, E-4.1 NO ANSWER result, 5- , 6- NO CARRIER result, 5- , 6- COURIER 2400 reason (S20), 4- , B-5.3 NO DIAL TONE result, 5- , E-1.1, E-4.1, E-6.1 COURIER 2400 Nonvolatile random access memory (NRAM) configuring, 5- , App. B-4 defined, 5- options, App. B-4 resetting to (Z), 5- writing to (&W, &Zn=s), 5- OK message, 2-5, 5- Online local echo, 5- Online fallback, 1-2, 4-3, E-2.3, F-1 Operations auto answer, 6- auto dial, 6-2--6-8 error control, 3-1, 4- , 6- flow control, 3- , 4- Originate mode, 2-6, 6- , E-1.1, E-4.1, E-6.1, E-6.2 Parity, 6-1 defined, Glossary Party lines, ix Pause during dial (,), 6- Phone company, connecting to, ix Phone line interface, 2-4, F-1 dedicated or short line, E-4.1 multiphone (DIP switch 7), B-3.2, E-4.1 PBX installations DIP switch 7, B-3.2 procedures, E-4.1 Phone jacks on Courier, 2-4 RJ11C (single phone), 2-1, B-3.2 RJ12, RJ13 (multiphone), B-3.2, E-4.1 Phone number storage (&Zn=s), 5- Placing a call, 3- , 6- Pound sign (#), 6- Problems and solutions, App. D ARQ compatibility (S17), B-5.4 Programming rate switching, App. E-2 Pulse dialing, 6- Quiet mode, 5- , D-1, D-2 Radio/television interference, x RAM, random access memory, Glossary Rate select commands DTE rate (&B), 3-, 4- link rate (&N), 3-, 4- Rate switching, 3-2, 3-3, 4-8, App. E-2 Received data flow control (&I, &R), 4- COURIER 2400 Redial/re-execute continuous (A>), 6- one time (A/), 6- Remote echo, 5- Repeat mode commands (>, A>), 6- Requirements, operating, 2-1 9600 bps, 3- MNP, 3-1 ventilation, 2- Reset to NRAM defaults (Z), 5- Response time, 1- Result code sets, 5- Retrain sequence, 1-2, 6- , App. E-3 Retransmission, 3- , 4- , A- maximum to timeout, 4- RING result code, 6- RINGING result code, 5- RJ11C jack, 2- , B-3.2 RJ12/RJ13 jack (multiphone line), B-3.2, E-4.1 RMA (Return Materials Authorization) number, viii, D-4 ROM, read only memory, 5- , 7- defined, Glossary RS-232C interface, App. B-1 CD (DIP switch 6), B-2.1, B-3.2, D-1, D-2 connectors, 2-1, 2-4 CTS (&H), 4- DSR (&S), 5- DTR (DIP switch 1), B-2.1, D-1 RTS (&R), 4- Serial transmission, Glossary Service levels, MNP, A-1--A-3 Settings default, App. B-4, App. C interface, Ch. 4 internal, Ch. 5 quick reference, Ch.3 Shorting A/A1, multiphone lines, B-3.2, E-4.1 Speaker (audio monitor), 5- Speed recognition, 4-8, 6-1, App. E-2 Speed select DTE rate (&B), 3-, 4- link rate (&N), 3-, 4- S-registers, 5- , 7-3, App. B-5 Standards Courier compatibility with, 1-3, 6-1, F-1 RS-232C, App. B-1, B-3.2 Start/Stop bits, 6-1, F-1 Store phone number (&Zn), 3-3, 5- COURIER 2400 Technical Specifications, App. F Technical Support, USRobotics, viii, D-4 Telephone company, connecting to, ix Television/radio interference, x Terminal (DTE) interface speed select (&B), 3-, 4- Terminal Mode, 2-4, Glossary Terminology, 4- , Glossary Testing, 2-5, App. E-6 Throughput, 1-1, 3-2, 4-8, A-2--A-3 Touch-tones dialing, 6- timing, spacing (S11), B-5.2 Transmission rate, 3-1, 3-2, 4-8, 6-1, App. E-2 DTE interface (&B), 3- , 4- link interface (&N), 3- , 4- Transmit data flow control (&H), 3-1, 3-2, 4-3, 4-5--4-6 Trellis coded modulation, 1-1, F-1 Turnaround, high speed channel, 1-1, 3-2--3-3, F-1 Unattended operation, 6-8 United Kingdom requirements CCITT answer sequence (B), 6-10 Guard tone enalbed (&G), 6-10 Pulse dial make/break ratio (&P), 6-11 Variable/fixed data rates DTE interface (&B), 3- , 4- link interface (&N), 3- , 4- Ventilation, 2- Voice/data communications configuring for, 2-4 using both, App. E-1 Warranty information, viii Word length, 6-1, F-1 XMODEM-type protocols, 4-2, 4-5, B-5.3 YMODEM, 4-2, 4-5, B-5.3 ZMODEM, 4-2