ZyXEL Communications U-336R User Manual Download Page 134

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122 Diagnostics & Troubleshooting

FRN (Fast Rate Negotiation) Granted (FG)

The count of the granting of the remote modem's change rate
(FRN) requests. Each request is an indicator of a changed receiving
condition.

FRN Request (FR)

The count of the local modem's requests to change the rate.

Block Retransmitted (BR)

The count of the blocks retransmitted (bad reception on the remote
modem).

FCS (Frame Check Sum) Errors (FE)

The count of the FCS errors received (block errors) (bad reception
on the local modem).

Link Status Report (ATI2)

During a connection, the modem will record information about link
operations. You can use the AT command ATI2 to see the
summary, as show in the sample below:

ZyXEL U-MODEM LINK STATUS REPORT

Chars Sent

2420

Chars Received

2420

Octets Sent

950

Octets Received

950

Blocks Sent

Blocks Received

Blocks Resent

Max Outstanding

Max Block Size

256

Summary of Contents for U-336R

Page 1: ...U 336R RE User s Guide Version 1 0 Mar 1997 ZyXEL ACCESSING INTERNET INTRANET...

Page 2: ...t as provided under this warranty is the exclusive remedy of the purchaser This warranty is in lieu of all other warranties express or implied including any implied warranty of merchantability or fitn...

Page 3: ...d herein without notice This document is subject to change without notice Acknowledgments Trademarks mentioned in this manual are used for informational purposes only Trademarks are properties of thei...

Page 4: ...ications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment Shielded RS 232 cables are required to be used to ensure compliance wit...

Page 5: ...hould ensure that the electrical ground connections of the power utility telephone lines and internal metallic water pipe system if present are connected together This precaution may be particularly i...

Page 6: ...ending directive on the approximation of the laws of the member states relating to electromagnetic compatibility Contacting ZyXEL If you have questions about your ZyXEL product or desire assistance co...

Page 7: ...his FTP address ftp zyxel com For European and Asian versions and related files use the address ftp zyxel co at Postal Service You can send written communications to the following address ZyXEL Commun...

Page 8: ...3 Unpacking Your Modem 4 Enclosed Equipment 4 Required Equipment 4 Becoming a Registered Owner 5 2 Installation 7 U 336R RE Modem Card 7 Required Steps for U 336R RE Installation 9 Installing the mod...

Page 9: ...puters 24 Default Modem Settings for PC s 25 ZyXEL Serial Parallel I O Card 25 Helpful Hints for Macintosh Computers 26 Special AT Command Settings for Macintosh 26 Macintosh Serial Port 26 Mac Softwa...

Page 10: ...curity Functions 39 Levels of Security 39 User Passwords 40 Remote Configuration 42 Caller Number Delivery Caller ID 43 Distinctive Ring 46 Extended Distinctive Ring EDR 47 Setting Up EDR 49 EDR Appli...

Page 11: ...e 111 Result Code Field Descriptions 113 Connect Strings for Error Corrected Connections 113 10 Diagnostics Troubleshooting 116 Diagnostics 116 Power On Self Test 117 Loopback Tests 118 Indicator Ligh...

Page 12: ...xii 12 Terminal Pinouts 133 Terminal Blocks 133 PC Serial Port Pinouts 134 Macintosh Serial Port Pinouts 135 13 Index 137...

Page 13: ...Features No other 33 6 Kbps modem gives you so much for so little Your modem is equipped with an array of standard and Intelligent features designed to make your data communications faster easier and...

Page 14: ...ain with automatic fall forward and fall back Your modem will automatically fall back to lower speeds when communicating with slower modems and when encountering unstable or variable line conditions C...

Page 15: ...mands ITU T V 17 G3 up to 14 400bps ITU T V 29 G3 up to 9 600bps ITU T V 27ter G3 up to 4 800bps ZyXEL Fax AT commands Technical Specifications Operating mode auto dial answer Flow control software XO...

Page 16: ...e package should include One U 336R RE universal modem One warranty registration card Contact your dealer or the store where you bought the modem if anything is missing Check the modem for shipping da...

Page 17: ...ne from your telephone company dial up or leased line Data and fax communication software Becoming a Registered Owner Complete the pre addressed Warranty Registration Card and place it in the mail Reg...

Page 18: ...6 Introduction...

Page 19: ...fteen LED indicators and two switches The U 336RE front panel consists of fourteen LED indicators and two switches The LEDs on the front panel display the current status and configuration of the modem...

Page 20: ...inal Ready The attached computer is ready to send or receive data DSR Data Set Ready The modem is ready to send or receive data RTS Request to Send The DTE requests to send data for transmission CTS C...

Page 21: ...lephone set is connected to the line ANS ORG switches the modem between ANSWER and ORIGINATE modes when the modem goes off hook O ONOTE THE ANS ORG SWITCH ONLY DETERMINES MODEM ON LINE MODES WHEN THE...

Page 22: ...M CARD WILL NOT SEAT AND THE HOLDING SCREWS WILL NOT TIGHTEN IF YOU INSTALL THE MODEM CARD UPSIDE DOWN Connect to phone lines Sixteen terminal blocks correspond to the sixteen modem card slots in the...

Page 23: ...Switch the power source selector to AC or DC according to the type of power supply s you are using 4 Make sure all other hardware installations are complete 5 Unscrew the front panel and turn on one...

Page 24: ...ons software manual will explain how 4 Look at the modem s front panel and verify the DTR LED is ON If this LED is OFF your communications software is not addressing your modem at the correct COM port...

Page 25: ...Installation 13 10 for troubleshooting suggestions...

Page 26: ...14 Installation...

Page 27: ...y the user with the computer keyboard Command statements must be written in a specific form in order for your modem to recognize them A command statement always begins with the letters AT or at It is...

Page 28: ...be prompted for country information area code and phone number and the device used to make the connection For this test purpose do not enter a phone number simply choose the COM port your modem is co...

Page 29: ...ect from the Call menu Dialing and Answering Techniques Depending on what communications software you use to make modem connections you may not have as much control of how the modem dials the telephon...

Page 30: ...flash hook ATDT 2468 Auto Answer and Hook Controls Enabling Auto Answer ATS0 n O ONOTE IN THIS EXAMPLE N IS A NUMBER FROM 1 TO 255 THAT CORRESPONDS TO THE NUMBER OF RINGS AFTER WHICH YOUR MODEM ANSWER...

Page 31: ...when issuing AT Commands The ENTER or RETURN key must be pressed to execute a command Multiple AT commands can be combined into one line For example AT D2 and AT N0 can be combined into one line AT D...

Page 32: ...a few basic commands that do not require the AT command prefix These are as follows Command Description A Repeats the last issued AT command once A Repeats the last issued AT command once or re dials...

Page 33: ...r modem sends a result code to let you know whether the command was executed An OK result code means the AT command you sent was executed If you receive an ERROR code it means the command was invalid...

Page 34: ...0 and press Enter The modem responds with a three digit character showing the value of this register followed by OK A value of 002 for example means your modem will auto answer incoming calls after th...

Page 35: ...the format AT Zs n The s is a number from 0 to 49 that represents the location in memory that the phone number is to be stored and the n is the phone number itself Example To store the number 1 816 5...

Page 36: ...Resets the current settings with the settings in profile n n 0 to 4 Profiles 0 to 3 User profiles Profile 4 Factory default profile Helpful Hints for PC Computers Most PCs are equipped with more than...

Page 37: ...our AUTOEXEC batch file Default Modem Settings for PC s Your modem s factory settings are configured for operation with PC type computers and communication software In most cases no additional setting...

Page 38: ...ou may use the factory default settings with one exception You must set the modem to ignore the DTR signal as follows Type AT D0 enter set modem to ignore DTR AT WZ enter saves the settings to power u...

Page 39: ...y seem to freeze for a few minutes During this time the line manager software tries to locate and to set up the modem Turn on your modem before you start your Macintosh to avoid this delay MaxFax is a...

Page 40: ...terminal screen or an X Windows application you need a program such as Minicom or Seyon If you wish to make use of your ZyXEL modem s special features special gettys such as mgetty or vgetty are neede...

Page 41: ...m is supplied with Before synchronous transfers are started some initial settings should be made V 25bis Command Set To enable V 25bis commands use the AT I1 command For synchronous applications the m...

Page 42: ...CFI CFI XX Call failure indication ET Engaged Tone NS Number is not stored RT RING Tone AB Abort Call NT Answer Tone is not detected INC INC Incoming call VAL VAL Valid INV INV Invalid LSN LSN n numb...

Page 43: ...the sending DTE INTERNAL AT X0 The modem provides the clock and sends it to the DTE Adaptive rate can be used Default EXTERNAL AT X1 The DTE provides the clock and sends it to the modem Must use auto...

Page 44: ...the number Once the modem is connected the modem will enter synchronous operation 2 Dial through the computer using V 25bis commands Some communication software packages on synchronous computers can...

Page 45: ...ill go into synchronous operation after connection Answering from Synchronous Mode Auto Answer Set the modem to synchronous mode Set the S register S0 to equal the number of rings before auto answer o...

Page 46: ...34 Synchronous Mode Operation...

Page 47: ...ur modem default line is a dial up type DL which includes a separate leased line jack The leased line must be connected to the jack labeled LEASED LINE located at the rear of the modem You can set you...

Page 48: ...ings In a leased line connection the communication circuit between two modems is always present Dialing and waiting for rings does not occur in this situation If these two modems want to establish a d...

Page 49: ...If the dial backup is enabled the originating modem attempts to dial a pre stored telephone number to backup the connection the answering modem will reattempt to connect to the leased line and monitor...

Page 50: ...ATS34 n 1 n 255 default 30 Retries leased line after n minutes If the leased line has still not been recovered the modem will continue to use the dial backup line Aborting from Leased Line Operation...

Page 51: ...emote modem is also a ZyXEL modem Type 2 security is used when the remote modem is any other brand The type 1 connection the dial in remote modem will send in its supervisor password for checking at t...

Page 52: ...al mode Any access attempt will result in the modem s prompting the user to enter the supervisor password The attempt will be rejected if the entered password is not correct The default supervisor pas...

Page 53: ...sword check and callback G3 Enable type 2 and level 1 security with password check G4 Enable type 2 and level 2 security with password check and callback G5 Enable type 2 and level 2 security with pas...

Page 54: ...ctive settings back to the profile Then the connection is reestablished and the profile transmitted to the remote modem Reading a remote profile b into a local profile a is achieved with the command A...

Page 55: ...e are many remote modems and a set of standard configurations is available so you can store them into user profiles You just need to configure the remote modem into one of the standard configurations...

Page 56: ...NOTE THE CALLER ID MESSAGE MAY CAUSE SOME COMMUNICATION SOFTWARE TO BECOME CONFUSED IF YOU PLAN TO USE THE CALLER ID FEATURE BE SURE YOU ARE USING SOFTWARE THAT SUPPORTS IT SUCH AS ZFAX In single mess...

Page 57: ...NUMBER 7135551414 CALLER NAME Jordan Chu RING If the caller number and name are not available the ring message will appear as follows RING TIME 04 28 12 30 REASON FOR NO NUMBER OUT_OF_AREA REASON FOR...

Page 58: ...ure is the ability to have three numbers on the same line allowing you to list the three numbers for voice data and fax respectively You can then have your fax machine answer only the ring correspondi...

Page 59: ...4s off 0 8s on 4s off 3 5 0 4s on 0 2s off 0 4s on 0 2s off 0 8s on 4s off 4 6 0 3s on 0 2s off 1s on 0 2s off 0 3s on 4s off O ONOTE IF ALL OF THESE BITS ARE 0 OFF ANY RING WITH A DURATION LONGER TH...

Page 60: ...veral DTMF tones without physically answering the call The DTMF tones once detected by the modem will be reported as RING or RING n to the software application With these two functions your modem can...

Page 61: ...rings The EDR settings are defined in S register S51 S51 Bit mapped register default 0 Bits Bin Dec Description 7 6 00 0 Disable data CNG tone detection default 01 64 Report RING for data CNG tone 10...

Page 62: ...g1 ring2 ring3 3sec 3s 3s 3s S7 time out CID EDR RD EDR RD EDR RD EDR RD CID Caller ID task RD Ring Detection task EDR EDR task O ONOTE DURING THE EDR PERIOD ANY AT COMMAND WILL DISABLE THE EDR FUNCTI...

Page 63: ...n It is reported as RING If the remote fax machine does not generate the CNG tone ask a fax caller through your answering machine message to press or any other DTMF key if he or she wants to send a fa...

Page 64: ...52 Special Functions...

Page 65: ...d to include a fax transmitting and receiving function similar to a fax card Since the modem s interface with the computer is the standard serial RS 232 interface this interface is used for both modem...

Page 66: ...conditions are encountered When connecting to a G3 fax device your modem allows for fax speeds up to 9600 bps and will automatically fall back to 7200 4800 and 2400 bps if the line quality is poor Fa...

Page 67: ...onforming to different revisions may not work together A formally approved version is the Class 2 0 command set also called the TIA 592 standard Class 1 Command Set Command Value Description FCLASS n...

Page 68: ...ort value 3 V 21 ch 2 300 bps only 24 V 27ter 2400 Required for FTM FRM 48 V 27ter 4800 Required for FTM FRM 72 V 29 7200 Required for FTM FRM 73 V 17 7200 Required for FTM FRM 74 V 17 w st 7200 Requi...

Page 69: ...ad lines for a bad page parameter Determine if Copy Quality OK on the T 30 flow chart value 0 to 255 a value of 0 implies that error checking is disabled FBOR n Phase C data bit order n 0 Select direc...

Page 70: ...lpi vr 1 Vertical resolution Fine 196 lpi br 0 Bit rate 2400 bit s V 27ter br 1 Bit rate 4800 bit s V 27ter br 2 Bit rate 7200 bit s V 29 or V 17 br 3 Bit rate 9600 bit s V 29 or V 17 br 4 Bit rate 1...

Page 71: ...br wd ln df ec bf st Current session parameter refer to FDCC command FDIS vr br wd l n df ec bf st Current session negotiation parameter refer to FDCC command FDR Receive phase C data command initiat...

Page 72: ...t available for polling FMDL Request DCE model FMFR Request DCE manufacturer FMINSP n Minimum phase C speed parameter n 0 2400 bps n 1 4800 bps n 2 7200 bps n 3 9600 bps n 4 12000 bps n 5 14400 bps FP...

Page 73: ...e polling All other F commands are not supported but the modem will respond OK In many cases this means don t care See PN 2388 for command details Class 2 Command Responses Response Value Function and...

Page 74: ...e n 100 Receive error on phase D hang up code FNSC HEX string Report the non standard facilities command frame FNSF HEX string Report the non standard facilities frame response FNSS HEX string Report...

Page 75: ...t order n 0 Select direct bit order n 1 Select reversed bit order in receiving mode for phase C data FBS Buffer size parameter read only FCC vr br w d ln df ec bf st DCE capability parameter Refer to...

Page 76: ...ts FDR Receive phase C data command initiates document reception FDT Transmit phase C data command releases the DCE to proceed with negotiation FEA n Phase C received EOL alignment parameter n 0 Deter...

Page 77: ...ent for polling command n 0 The DTE has no document for polling n 1 Indicated document available for polling FMI Request DCE manufacturer identification FMM Request DCE model identification FMR Reques...

Page 78: ...dard frames are reported FTI FCI and FPI response reports are generated FNS string Non standard byte string parameter string string of hexadecimal coded octets FPI string Local fax station ID string f...

Page 79: ...number of consecutive bad lines If this value is exceeded for a given page the DCE shall consider the page unacceptable FSP n Enable polling command n 0 Disable polling n 1 Enable polling Class 2 0 C...

Page 80: ...to TIA 592 for details hsc 40 4F Transmit phase C hang up codes Refer to TIA 592 for details hsc 50 6F Transmit phase D hang up codes Refer to TIA 592 for details hsc 70 8F Receive phase B hang up co...

Page 81: ...Page good remote request for procedure interrupt accepted ppr 5 Page bad retrain requested remote request for procedure interrupt accepted The receiving DCE may count lc blc cblc and lbc due to DCE b...

Page 82: ...ibed in this chapter For instance you can use ATD to make a fax call or ATA to answer an incoming fax call When using the extended Fax AT commands you need to send the command AT FCLASS 6 first Follow...

Page 83: ...dence Parameter Setting Command Function V0 Set to normal vertical resolution V1 Set to high vertical resolution T0 Set to one dimensional coding scheme T1 Set to two dimensional coding scheme R0 Set...

Page 84: ...C7 Set minimum scan line time capability of the receiver 0 ms at 3 85 line mm T 7 7 T 3 85 P string Set local phone number to the phone number following the character P can store up to 25 characters...

Page 85: ...speed nnnn 1440 1200 9600 7200 etc 1440 and 1200 stand for 14400 and 12000 Vn Vertical resolution n 0 or 1 Tn Coding scheme n 0 or 1 Rn Recording width n 0 1 or 2 Ln Recording length n 0 1 or 2 Cn Sc...

Page 86: ...as RTS off is detected the modem starts the post message handshaking to make sure that the remote facsimile has received the fax message successfully Then it hangs up the phone and sends a status repo...

Page 87: ...CONNECT FAX 3 Set the external mail string to ZyXEL and give it an error level 4 In your BBS batch file if the error level matches the external mail execute rcvfax 2 p comport w workpath This setting...

Page 88: ...76 Fax Operation String Error Level 1 ZyXEL 100 2 3 The following is a sample setting in the BINKLEY CFG file for a Binkley system Init AT FX7S0 1 B1 FCLASS 6 ExtrnMail ZyXEL errorlevel...

Page 89: ...when enter in handshaking state Escape sequence code entered in data state wait for modem to return to command state Command Options Function Description Ref A Go on line in answer mode See also S39...

Page 90: ...g digits will be dialed as in band DTMF DL Repeat last ATD command DSn n 0 49 Dial number stored in non volatile RAM at location n use to dial two consecutive numbers for bundling or MPPP calls S44 3...

Page 91: ...N0 will disable the audio ring function S24 0 2 O Return to on line state O1 Force modem to request a retrain Qn Result code displayed S23 7 Q0 Modem returns result code Q1 Modem does not return resul...

Page 92: ...tions Table S23 3 5 Zn n 0 4 Reset modem and set power on profile S15 5 7 Zn Reset modem and load user profile n 0 3 Z4 Reset modem and load factory settings Basic command summary help Extended AT com...

Page 93: ...ct 14400 ARQ V42b Disconnect Reason Local Hangup Data Type Description Chars Data received from or sent to DTE PC Formatted as 7 E 1 or 7 O 1 or 8 N 1 etc Octets Data received from or sent to remote m...

Page 94: ...Maximum blocks received without acknowledgment by remote modem Max Block Size Maximum octets contain in a block Retrains Requested The number of times local modem requested retrain Link Duration Total...

Page 95: ...tion Description Ref Bn Data rate terminal to modem DTE DCE S28 6 B0 DTE rate follows connection rate See also S44 6 B1 DTE DCE rate fixed at DTE setting See also S18 S20 and S44 6 Cn Carrier Detect C...

Page 96: ...low control disabled H3 Hardware CTS RTS flow control H4 Software XON XOFF flow control Jn Type of Phone line S28 0 J0 Single phone line RJ11 J1 Multiple phone modem line RJ12 RJ13 Kn Modem error cont...

Page 97: ...22bis V 22 and Bell 212A G3 Fax V 17 V 29 V 27ter and cellular modes See also S38 4 S43 0 S43 1 S43 3 and S48 5 N1 V 33 14400 12000 models with 4 wire leased line only N2 V 33 12000 models with 4 wire...

Page 98: ...300 N17 V 32bis 14400 12000 9600 7200 4800 N18 V 32bis 12000 9600 7200 4800 N19 V 32bis 7200 4800 N24 BELL 212A 1200 N25 BELL 103 300 N32 G3 Fax V 17 V 29 V 27ter 14400 12000 9600 7200 4800 2400 See a...

Page 99: ...lection S21 5 R0 CTS tracks RTS response delay is set in S26 R1 Ignore RTS assumes RTS always ON Sn Data Set Ready DSR function selection S21 3 S0 DSR overridden DSR always ON S1 DSR according to CCIT...

Page 100: ...user profile n in non volatile RAM See also S35 6 Xn Synchronous mode timing clock source selection S14 4 5 X0 Modem provides synchronous transmit clock signal Internal clock to pin 15 of EIA 232D X1...

Page 101: ...ble dial backup Bn Enable dial backup and set dial backup pointer at telephone directory location n 1 See also S34 S44b2 Cn Character length including start stop and parity bit S15 3 4 C0 10 bit chara...

Page 102: ...G2 Enable type 1 security with password check and call back ZyXEL to ZyXEL only G3 Enable type 2 security with password check G4 Enable type 2 security with password check and call back G5 Enable type...

Page 103: ...ect if signal quality is poor Rab Read remote profile b to local user S36 1 a 0 3 Local user profile number a S37 4 7 b 0 3 Remote user profile number b S37 0 3 b 4 Remote active configuration b 5 Rem...

Page 104: ...ngs on which the modem will answer 0 value disable auto answer 000 S1 Counts and stores number of rings from an incoming call 000 S2 Define escape code character default 43 dec A value of 128 255 disa...

Page 105: ...eration 006 S10 Set duration in tenths of a second modem waits after loss of carrier before hanging up 007 S11 Set duration and spacing in milliseconds of dialed Touch Tones 070 Extended S Registers A...

Page 106: ...ng Default M0 64 40 Asynchronous command synchronous data M1 128 80 Direct asynchronous no data buffering M2 192 C0 Synchronous M3 S15 bit dec hex Bit mapped register 130 0 1 0 0 Even parity 1 1 Odd p...

Page 107: ...T6 7 7 Remote Digital Loop back with self test in process T7 8 8 Analog Loop back with self test in progress T8 S17 bit dec hex Bit mapped register 018 4 1 0 30 0 1E Set leased line transmit power lev...

Page 108: ...dec hex DTE speed bps Auto detected from AT Command 003 0 0 230400 bps 1 1 115200 bps Default 2 2 76800 bps 3 3 57600 bps 4 4 38400 bps 5 5 19200 bps 6 6 16800 bps 7 7 14400 bps 8 8 12000 bps 9 9 9600...

Page 109: ...connection when modem error control handshake fails E0 1 1 Drop connection when modem error control handshake fails E1 1 2 0 0 Speaker always OFF M0 2 2 Speaker ON until carrier is detected default M1...

Page 110: ...and return to command state D2 192 C0 108 2 DTR OFF causes the modem to hang up and reset the modem to profile 0 after DTR dropped D3 S23 bit dec hex Bit mapped register 105 0 0 0 Command echo disabl...

Page 111: ...S40 1 Q1 S24 bit dec hex Bit mapped register 2 0 0 7 0 7 Ring Volume control increment of 2 in decimal value N0 7 6 4 16 112 10 70 Speaker volume control increments of 32 in decimal value L0 7 S25 0 2...

Page 112: ...Software XON XOFF flow control H4 40 28 Reserved H5 6 7 Signal quality 0 0 No response to poor signal quality Q0 64 40 Retrain action taken if signal quality Q1 is poor Q1 128 80 Adaptive rate auto fa...

Page 113: ...apped register 0 1 1 Use CELL 4800T trells coded 4800 for V 32 4800 available with cellular mode only 1 2 2 Disable aborting from terminal during modem handshaking 2 4 4 V 26 alternative A see also N1...

Page 114: ...3 6 S36 bit dec hex Bit mapped register 000 0 0 0 Deny remote request for configuration Default F0 1 1 Grant remote request for configuration F1 1 0 0 Write from local profile a to remote profile b Wa...

Page 115: ...0 5 0 5 Remote profile number Wab 7 4 0 80 0 50 Local profile number Rab S38 bit dec hex Bit mapped register 000 0 1 1 Repeatedly dialing default number Dn S29 3 8 8 DCD ON OFF sequence follows UNIX s...

Page 116: ...e 2 ring detection 5 32 Enables type 3 ring detection 6 64 Enables type 4 ring detection S41 bit dec hex Bit mapped register 000 0 1 1 Special MNP compatibility see also S27 0 S38 5 Kn 2 4 4 Disable r...

Page 117: ...14 400 Fax in calling mode no effect to answering mode N32 5 32 20 Disable Data Voice button 6 64 40 Disable RINGING result code Xn 7 128 80 DCD forced on but pulse off for 0 5 seconds at carrier los...

Page 118: ...ntil connection is made DSn 4 16 10 DSR follows DTR see also S41 5 S1 5 32 20 Enable V 13 half duplex simulation in synchronous mode 6 64 40 When selected with B0 DTE speed fixed at 38400 when the lin...

Page 119: ...the specified interval in 20 ms units S48 bit dec hex Bit mapped register 000 0 1 1 Cause CND information to be reported in raw format 1 2 2 Enable DATA ONLY mode Auto detect V 34 ZyX V 32bis V 22bis...

Page 120: ...x Bit mapped register 006 3 0 0 15 0 F Set cellular mode transmit power level 9 to 24 dBm See also S43b2 7 0 0 For cellular mode only Modem is installed in office Default 128 80 For cellular mode only...

Page 121: ...Disables fax CNG tone detection Default 16 10 Reports RING for fax CNG tone 32 20 Reports RING 1 for fax CNG tone 48 30 Reports RING 2 for fax CNG tone 7 6 0 0 Disables data CNG tone detection 64 40...

Page 122: ...4 16 10 Enables the reporting of Class 1 capability in the response to FCLASS 6 0 0 Disabled busy detection when dialing is proceeding Default 64 40 Enables busy detection in dialing period S62 bit d...

Page 123: ...available when setting the ATXn command The default value for n is 5 when your modem is shipped ATV0 ATV1 X0 X1 X2 X3 X4 X5 X6 X7 0 OK V V V V V V V V 1 CONNECT V V V V V 2 RING V V V V V V V V 3 NO C...

Page 124: ...T 624000 32 CONNECT 124800 33 CONNECT 62400 34 CONNECT 41600 35 CONNECT 31200 36 CONNECT 24960 37 CONNECT 20800 38 CONNECT 33600 39 CONNECT 28800 40 CONNECT 26400 41 CONNECT 24000 42 CONNECT 21600 Use...

Page 125: ...ns Field Name Possible Values Error_Code NONE ARQ Error_Control LAPM V42 This field will not show if no error control is negotiated Data_Compression V42b DCE_Speed All possible DCE speeds supported DT...

Page 126: ...ult Codes Numerical V0 Verbose V1 Numerical V0 Verbose V1 53 CONNECT 4800 61 CONNECT 24000 54 CONNECT 7200 62 CONNECT 26400 55 CONNECT 9600 63 CONNECT 28800 56 CONNECT 12000 64 CONNECT 31600 57 CONNEC...

Page 127: ...Status Registers Result Codes 115...

Page 128: ...ote Digital Loop back with Self Test Line Condition Status Display Re Transmission Indicator Throughput Display Link Status Report The diagnostic tests listed above apply to several modes of operation...

Page 129: ...ED will flash The number of flashes will indicate the error as specified by the table below 0 SYSTEM TESTING Self test indicator If no error occurs this message will last until the end of the test 1 R...

Page 130: ...f anything is wrong by looking at the screen The screen should show the data you have sent to the modem This test can only be initiated while the modem is off line Analog Loopback with Self test AT T8...

Page 131: ...remote modem and local modem both provide V 54 Remote Digital Loopback capability This test can be initiated by either modem when the modems are on line Remote Digital Loopback with Self test AT T7 T...

Page 132: ...impairment readings you can understand the current line condition Your modem also logs line events over a long period so you know what the line condition has been We will describe these readings and...

Page 133: ...ue is 11 dBm Phase Jitter PJ This reading is expressed in peak to peak degrees for phase jitter in the 20 to 300 Hz frequency range in 1 degree resolution Frequency Offset FO Frequency offset is expre...

Page 134: ...ception on the remote modem FCS Frame Check Sum Errors FE The count of the FCS errors received block errors bad reception on the local modem Link Status Report ATI2 During a connection the modem will...

Page 135: ...d identifying problems with the link Following are explanations for each item and the terminology used above Chars Data characters transmitted between the DTE computer terminal and the modem Octets Da...

Page 136: ...e too many resends it may be a bad line or protocol incompatibility Max Outstanding Error control protocol parameter The maximum allowable number of blocks sent or received without acknowledgment Max...

Page 137: ...een modems in T 1 2400 sec units Normally should be in the range of 0 100 A satellite link will introduce a delay of about 1300 T Xmitter Underrun Number of times the modem fails to provide data octet...

Page 138: ...fy and resolve them Most modem problems are a result of incorrect cabling or settings within your communications or fax software This section provides a list of more common problems that you may encou...

Page 139: ...te type ATO and press Enter Problem You typed an AT command but did not receive an OK or 0 result code Solutions 1 Your communications software may be using a different COM port than your modem Be sur...

Page 140: ...ither your modem nor your communications software is configured to echo characters Use the E1 command to enable modem echo or turn on your software program s Echo or duplex feature Problem Each charac...

Page 141: ...do not respond in this way refer to your ZyXEL Modem Reference Manual 4 Set D0 and auto answer if your modem is not connected to RS232 or DTR is not ready Problem When you receive a phone call your m...

Page 142: ...ype AT T8 and press the Enter key with your modem in the command state You should see a smooth stair stepping ASCII test pattern flowing diagonally across your screen Connect Problems Problem Your mod...

Page 143: ...supports the XModem protocol 5 Type ATUPX enter 6 Press Enter and wait for the following prompt characters You have chosen XMODEM 128 bytes data with checksum protocol to update your modem Data in Fla...

Page 144: ...return the modem to the factory for repair In the unlikely event that your modem fails to respond to AT commands after upgrading the flash EPROM 1 Turn off the modem 2 Press and hold down the A O butt...

Page 145: ...given below Pin Assignment Purpose 1 TIP Connect to your telephone 2 RING Connect to your telephone 3 TIP Connect to dial up line 4 RING Connect to dial up line 5 RX For use with four wire leased lin...

Page 146: ...ed Data TXD 3 104 BB Received Data RXD 4 105 CA Request To Send RTS 5 106 CB Clear To Send CTS 6 107 CC Data Set Ready DSR 7 102 AB Signal Ground GND 8 109 CF Data Carrier Detected DCD 15 114 DB Trans...

Page 147: ...dicator Macintosh Serial Port Pinouts The following table shows the wiring of a modem Macintosh hardware handshaking cable Mac Din 8 Modem DB 25 Description 1 4 20 DTR to RTS and DTR Hardware Handshak...

Page 148: ...136 Terminal Pinouts...

Page 149: ...gital loopback 3 31 43 120 Distinctive ring 2 DOS 1 DSP code checksum 118 DSP RAM memory 118 DTE 1 8 30 31 45 57 60 63 64 65 67 71 73 74 75 81 82 83 84 97 105 107 114 124 125 136 137 EDR 3 47 48 49 50...

Page 150: ...21 Security 2 39 40 41 90 103 104 Seyon 28 SMARTDRV 25 S register 22 23 33 38 47 49 79 93 112 Switches 3 7 9 20 38 128 129 Synchronous mode 2 29 32 33 85 99 100 101 107 119 120 T 30 fax protocol 53 54...

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