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User's Manual 

V34bis Fax-modem - AJ 2885 P

 

   

 AJ 2885 P - Page 42  

8. Troubleshooting 

 

Problem: 

This chapter lists  most modem operating problems. 

 

Problem 

Check 

No tone when 
modem is turned 
on 

Connection to the mains On/Off switch in On position Power supply 
of the rack and fuse of the card (rack version), DTR indicator on or 
flashing 

Single and 
continuous tone 
when modem is 
turned on 

 

Send commands:  

AT&W255 <CR>  

ATZ <CR>  

Then restart the modem to see if the same continuous tone is heard. 
See Ati7 section below. 

Modem does not 
answer commands 

 

Flashing of the TXD indicator when sending characters. No flash: 
check V24 cable. Flashes: <CR> command:  

AT&S4 <CR>  

and check for a long flash of TXD indicator. Long flash: check V24  
cable.             

Modem answers 
"NO DIAL TONE" 

 

Try to dial an outside line using the ADT command. Make sure that 
you select a valid telephone number and dialling mode (P-Pulse, T-
Tone). Listen to the internal speaker to hear the normal dial tone is 
heard. If not check the line connection. 

Modem refuses to 
dial 

 

Check for any blacklisting: 

AT&NB <CR>  

(see reference manual) Turning the modem off and on resets the 
blacklist. 

 

ATI7 command: 

Check the answer to the ATI7 command. It provides a clear message in case of self detected 
problem. 

 

ATI7 Response 

BAD ROM 

Code EPROM checksum bad 

BAD RAM 

Write and read failure in RAM 

BAD NON VOLATILE MEMORY 

Non volatile memory checksum bad 

BAD DSP 

DSP bad 

ALB FAILED 

Analog loopback test bad 

 

If a problem persists after these verifications, contact your near distributor or the CXR "Hot 
Line" service:  

HOTLINE: +33 (0) 237.628.804. 

 

 

Summary of Contents for AJ 2885P

Page 1: ...1 User s Manual V34 Fax modem AJ 2885P P N 8000 601 953 Revision 01 Sales manufacturing and R D Center CXR SA Rue de l Ornette 28410 Abondant France T l 33 0 237 62 88 00 Fax 33 0 237 62 88 01 Techni...

Page 2: ...28 801 Foreword This document describes how to set up the CXR AJ 2885 P modem Chapter 1 is to familiarize the user with the operation of a modem Chapter 2 describes the installation Chapter 3 describe...

Page 3: ...0 standards 5 VDC Input of the AJ 2885P xxV desktop unit 48 VDC Input of the AJ 2885 P xxC desktop unit Terminal V24 RS232 data port The following access are referenced as TNV Telecommunication Networ...

Page 4: ...idential or light industrial use within the following environmental conditions Storage Temperature 0 to 70 C Operating Temperature 0 to 45 C Hygrometry 0 to 90 without condensation Class IP40 Flammabi...

Page 5: ...disposed with other household wastes at the end of working life To prevent possible harm to the environment or human health from uncontrolled waste disposal please separate this from other types of w...

Page 6: ...14 4 KBPS Cl 2 G 3 Fax V11 X21 V35 interface V23 Bell 202 T 1200 1200 4 wire mode LCD and 3 keys front panel remote action and alarm relays Firmware in Flash memory Metallic enclosure internal 110 23...

Page 7: ...2885 will back up onto the dial up network Not only that it will continue to monitor the Leased Line until it is operational and switch back automatically This is called Intelligent Look Back Back up...

Page 8: ...YNTAX OF AT COMMANDS 18 3 2 FIRST DIALOGUE 18 4 FRONT PANEL OPERATION 19 4 1 OPERATING MODES 19 4 1 1 Operating modes 19 4 1 2 The Front Panel 19 4 1 3 The Push Button 20 4 1 4 Configuration Select 21...

Page 9: ...38 7 SPECIFICATIONS 39 7 1 LINE SIDE CHARACTERISTICS 39 7 2 AUTOMATIC CALL ANSWER 39 7 2 1 Originating 39 7 2 2 Answering a Call 40 7 2 3 Connection Disconnection 40 7 3 SERIAL INTERFACE 40 7 4 FAX MO...

Page 10: ...modem also allows transfer of computer data such as ASCII files from a text processor PCX or TIF files from a graphic editor etc The Fax mode operation is controlled by a fax software which Converts...

Page 11: ...ollowing speeds V22 1200 bps V22bis 2400 bps V32 9600 bps 4800 bps V32bis 14400 bps 12000 bps V34 33600 bps down to 2400 per steps of 2400 bps In case of failure on the leased line the AJ 2885 modem p...

Page 12: ...ese functions are described in chapter 4 of this manual Some of the extra functions are Storage of phone numbers Forced V24 signals Exchange of a password between two modems Answer Back Pre qualificat...

Page 13: ...ion Leased line RJ 11 cable except for STV and FTV versions A CD ROM that includes The AT and V25bis command reference manual This User manual Software as an option Connections Connect your modem as s...

Page 14: ...the K3 option is available This function forces the line to be active when there is A faulty power supply No answer to a call after N rings N is set by the S20 register This maybe due to a non connec...

Page 15: ...lation See rack operation manual to install your modem Find an empty location in the rack and insert the AJ 2885 card into its card guide Connection Connect your modem from the rear of the rack accord...

Page 16: ...ly on the FT model The following data terminal signals can be forced ON through these four switches Switch Signal On position effect AT Command SW5 1 DTR The 108 DTR signal from the terminal is ignore...

Page 17: ...y Its data memory Its stored memory Its data processing unit The test lasts a few seconds and ends with a series of Different tones if the test is ok The same tone if a failure is detected This failur...

Page 18: ...orresponds to the Carriage return or Enter key f the keyboard The following commands do not comply with this syntax A or a to repeat the last command to escape from connect data mode to local command...

Page 19: ...t panel or if a call is received when the modem is configured to answer calls 2 COMMAND MODE The modem enters the command mode when it receives a recognized command In this mode commands are interpret...

Page 20: ...duplex Off Command Mode Equally a sign of bad DSP during power up test PSTN Off 300 bps Flash 1 Time 1200 bps Flash 2 Times 2400 bps Flash 3 Times 4800 bps Flash 4 Times 9600 bps Flash 5 Times 12000...

Page 21: ...Factory configuration 4 V25bis BSC dialer AT F4 0 0 1 0 User configuration 0 AT M0 0 1 0 0 User configuration 1 AT M1 0 1 1 0 User configuration 2 AT M2 1 0 0 0 User configuration 3 AT M3 1 0 1 0 User...

Page 22: ...remote one i e remote carrier is detected DATA 103 104 Flashes as data are received and transmitted by the modem DTR 108 Indicates that the data terminal equipment connected to the modem is ready for...

Page 23: ...main menu Case 2 COMMAND ECHO ON CHANGE CHANGE VISUAL DISPLAY Comes back to configuration menu Case 3 COMMAND ECHO ON OFF COMMAND ECHO ON CHANGE Leaves the parameter unchanged From the main menu LEFT...

Page 24: ...set by ATZ command or power lost To save memory and make modification permanent you must validate the last menu of the number editing PRESS ENTER TO SAVE NUMBER MEMORY On display Press the key Comment...

Page 25: ...editing to get 3 then 3 to get 3 then 33 to get 2 then 332 to get 3 then 3323 to get 7 then 33237 to validate 33237 Note that dialable digits are available as well as control character Refer to the di...

Page 26: ...ion V42bis and MNP automatic mode M2 Flow control RTS CTS LG2 This configuration can be modified for a specific application The following examples describe the most common applications 5 2 Selecting t...

Page 27: ...to 14 4 KBPS The OM command selects the desired mode which is especially suitable for leased line connection Modulation DCE speed the M command selects the connection DCE speed when the Autobaud featu...

Page 28: ...uding is either limited to the DTE speed detection A2 or disabled A0 DCE connection speed can be set up independently thanks to the M parameter DTE terminal speed remains unchanged in asynchronous mod...

Page 29: ...be autobaud M10 75R 1200T V23 Modem can not be autobaud M11 1200 V22 1200 AT OM2 OM2 M1 2400 V22 Bis 2400 AT OM2 OM2 M2 4800 V32 4800 AT OM2 OM2 M3 9600 V32 9600 AT OM2 OM2 M4 7200 V32 Bis V32Bis fall...

Page 30: ...on The modem is set in default factory configuration in automatic mode so that it can negotiate the best protocol with the remote modem A flow control should be configured in asynchronous mode to avoi...

Page 31: ...Function M1 Selects the asynchronous connection mode M 0 Direct mode The modem is transparent to the transferred data Transfer delay is the lowest possible 1 Normal mode The modem buffers bytes and re...

Page 32: ...connection The following example shows how to store a number name and control sequence at location 3 of the directory memory Dialing a direct line send the command ATDT36062424 CR Dialing via a PABX s...

Page 33: ...h dialup requirements it is the user s responsibility to use this mode on a private line only 5 9 V23 and Bell 202 T Modes on Leased Line AJ2885P modem provides several V23 BELL202 modes on leased lin...

Page 34: ...tion is saved even when the modem is turned off The modem will load the last saved user configuration at power up 5 11 V54 Maintenance The AJ 2885 modem provides V54 loop test functions The A terminal...

Page 35: ...ror correction protocol AT M1 AT T7 same loop with automatic character sending and checking by the A modem It displays the error counter at the end of test The connection must be done without any erro...

Page 36: ...e current user s parameters in bank 0 AT W5 activates factory configuration bank 0 for next reset with no change on the other user s configuration banks The last stored user configuration will be load...

Page 37: ...answerback code see the following example The password can be up to 12 characters long Store answerback for example AC24Y AT A AC24Y AC24Y CR To disable answerback security AT A CR 6 4 Callback secur...

Page 38: ...password matches the operator or supervisor password stored in memory then the modem will reconnect otherwise it will drop the line S32 number of minutes of inactivity that will start the password req...

Page 39: ...0 dBm only some higher received level may induce a loss of performance Recom mendations Call Answer Speed Bps Xmit 0 Xmit 1 Received 0 Received 1 V22 bis Call 2400 1200 1200 2400 2400 Answer 2400 2400...

Page 40: ...uter or terminal The serial port will automatically recognize DTE speeds up to 115200 bps This is called auto bauding Both asynchronous and synchronous except FSK V21 V23 modes with internal or extern...

Page 41: ...Identification of called subscriber by CIG FCSI Identification of called subscriber by CSI FTSI Identification of calling subscriber by TSI FDTC Called fax return capability DCS frame FDCS Discussed c...

Page 42: ...indicator Long flash check V24 cable Modem answers NO DIAL TONE Try to dial an outside line using the ADT command Make sure that you select a valid telephone number and dialling mode P Pulse T Tone L...

Page 43: ...ckup indicator 12 SPD High speed indicator 15 SCT 114 Time basis for signal elements at transmission Source ETCD 17 SCR 115 Time basis for signal elements at reception 18 TB3 141 Test command Local lo...

Page 44: ...1 101 P GND 101 P GND 2 103 TXD 103 A TXD A J 11 3 104 RXD 104 A RXD A J 14 4 105 RTS 105 RTS 5 106 CTS 106 CTS 6 107 DSR 107 DSR 7 102 S GND 102 S GND 8 109 CD 109 A CD A I A J 15 9 116 SS 116 SS 10...

Page 45: ...n V11 X21 Signal DB15F Pin 1 Mechanical GND 1 2 TA Transmit 2 3 RA Receive 4 4 5 6 7 GND 8 8 IA Indication 5 9 10 11 XB DTE Clock 14 12 SB Clock 13 13 14 TB Transmit 9 15 16 RB Receive 11 17 SA Clock...

Page 46: ...4 105 RTS C 5 106 CTS D 6 107 DSR E 7 102 S GND B 8 109 CD F 9 10 11 113 B XCK B W 12 115 B RCK B X 13 114 B TCK B AA 14 103 B TXD B S 15 114 A TCK A Y 16 104 B RXD B T 17 115 A RCK A V 18 141 TB3 K...

Page 47: ...d line connector RJ11 connector Pin Signal 2W Signal 4W 1 Not used Not used 2 Not used Receive Tip 3 Tip XMIT Tip 4 Ring XMIT Tip 5 Not used Receive ring 6 Not used Not used 9 7 Alarm relay connector...

Page 48: ...se either loop disconnect or DTMF signalling only the performance of the DTMF signalling is subject to regulatory requirements for correct operation It is therefore strongly recommended that the equip...

Page 49: ...during the period of guaranty will abort the application of the guaranty Any damage due to an accident a bad use or a non compliant installation is not covered by the guaranty 3 Documentation The doc...

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