Connecting an Oki product to ISDN
Contents
1. A Guide to Understanding Analog Fax in Digital Environments OKI PRINTING SOLUTIONS 2010 OkiData Americas Inc Disclaimer Every effort has been made to ensure that the information in this document is complete accurate and up to date The manufacturer assumes no responsibility for the results of errors beyond its control While all reasonable efforts have been made to make this document accurate and helpful as possible we make no warranty of any kind expressed or implied as to the accuracy or completeness of the information contained herein For the most up to date service information available visit our website at www okidata com Okidata Americas Inc 2010 Introduction Oki Fax and MFP products are designed to work with traditional analog phone services They are not designed to work with digital phone services such as DSL PBX VoIP or ISDN While Oki fax MFP products are_not supported on these types of lines they may work with the proper setup and additional equipment Full Fax Support is offered for Oki products that are on Dedicated Analog Telephone lines only See page 3 for more information on configuring the Oki fax MFP product for DSL PBX VoIP and ISDN lines This information is provided as a courtesy to help set up and troubleshoot issues related to connecting an Oki fax MFP product to a digital phone line Tmportant Note It is important to understand the customer environment prior to inst2. Telephone Network LINE TEL Om A D Converter The Oki product will have an RJ 11 Fax cable supplied with it connect this to the product outlet at the back of the machine as shown in the diagram above 2 Connect the NTBA Network Termination for Basic Access Connect the A D converter Analog to Digital converter and if applicable other ISDN equipment to the NTBA Connect the Oki product into one of the A D converter s ports analog outlets B according to the guidelines of the A D converter manufacturer WARNING It is usually advisable to program the port on Multicombi mode Equal mode or equivalent Please follow the instructions in the manufacturer s manual for the A D converter to program the ports NOTE The NTBA and A D converter may be in 1 box In most cases these names are labeled on the equipment The port on the A D converter can usually be programmed to get an external dial tone directly You may use any A D converter port to connect to the Oki product Some A D converters can assign a different fax number to the ports available If the A D converter has this functionality its users manual should cover details of how this can be done What is VoIP Voice over Internet Protocol Voice over IP VoIP services provide normal telephone service usually long distance through a broadband Internet connection rather than the standard telephone network These services use packets to break up the voice signa
3. alling an Oki Fax MFP product to ensure that the Oki product will operate in that customers environment Line setup options should be discussed with the telephone service provider For further information or support contact the service provider or system administrator NOTE If there is voice mail call waiting or billing tone installed on the telephone system disable these features as they can interrupt fax communication The Oki Fax MFP product shown in the diagrams might differ from your actual product These diagrams are to be used only as guidelines in that Oki fax MFP products are not supported on these types of lines and should be used for reference purposes only Understanding Analog Fax in Digital Environments Contents Section 1 e What is DSL Digital Subscriber Line e Connecting an Oki product to DSL e What is a PBX Public Branch Exchange e Connecting an Oki product to a PBX e What is ISDN Integrated Service Digital Network e Connecting an Oki product to an ISDN e What is VoIP Voice over Internet Protocol e Connecting an Oki product to VoIP Section 2 e Basic Troubleshooting of Fax Issues e Troubleshooting and Help What is DSL Digital Subscriber Line DSL Digital Subscriber Line is a special service that allows digital data to be delivered to a computer using a normal telephone line DSL also referred to as XDSL ADSL HDSL or RADSL uses a much higher bandwidth for transmitting information tha
4. avel from its point of origin to its point of destination which then exceeds timing requirements What can be done to help the fax transmission The communication speed is a major factor in fax transmission over VoIP Currently there are three speed standards e Fast v 34 which communicates at 33 6 Kbps e Medium v 17 which communicates at 14 4 Kbps e Slow v 29 which communicates at 9 6 Kbps Changing the fax speed setting to medium or slow may improve your ability to send a fax over a VoIP network On all Oki fax products the connection speed can be set to a lower speed Consult your product user s manual for information specific to the Oki model Try the fax again If you continue to have problems faxing contact your VoIP provider as they may have options to improve the ability to send and receive faxes over VoIP telephone service 10 Basic Troubleshooting of Fax Issues Contents A Troubleshooting Preparation Step 1 B Testing the phone line and phone cable Step 2 C Verifying the fax configuration and settings Step 3 D Faxes can be sent but not received E Faxes can be received but not sent F Faxes fail intermittently or with only one fax number G Faxes cannot be sent or received or the issue cannot be determined H Troubleshooting and Help 11 A Troubleshooting Preparation Step 1 Make sure that the following items are available to complete the troubleshooting steps included in this document Fax
5. configuration and settings Print Configuration Page s Another analog fax device for testing send to receive from The phone number of another fax machine that can be used to verify whether the Oki fax is sending and receiving correctly A single line telephone This phone will be used for testing the phone line The original Oki fax RJ 11 cable supplied with the unit B Testing the phone line and phone cable Step 2 Part 1 This step is aimed at testing both the phone line and the phone cable To do so follow the instructions listed below 1 Ze b Unplug the phone cable from the Oki Fax Verify the phone cable configuration iE Correct Incorrect 2 wire 4 wire Plug the phone cable into a single line phone Pick up the handset and listen for a dial tone If no dial tone is present then replace the phone cable with another one and listen again for a dial tone If a dial tone is present unplug the phone cable from the test phone and plug it into the fax line port on the Oki Fax and test the sending and receiving functions of the Oki fax product If the fax works properly stop here If the fax continues to have issues go to Part 2 If no dial tone is present then stop here and contact your telephone service provider for assistance 12 Part 2 If a dial tone is present follow the steps below e Dial a local phone number and verify that the call can be completed If the outgoing ca
6. ct this to the product outlet at the back of the machine as shown in the diagram above Connect the Oki Product into one of the PBX wall sockets according to the B guidelines of the PBX manufacturer NOTE In the set up above each unit will have its own telephone line and hence its own telephone number See your PBX manual for instructions on setting up telephone lines including sharing telephone lines between multiple ports You may use any port on the PBX to connect your Oki product The port on the PBX can usually be programmed to get an external dial tone directly In most cases a fax number can be assigned to the specific PBX port you have connected the Oki product to For further information please consult your PBX documentation What is ISDN Integrated Service Digital Network ISDN provides two B channels and one D Channel on a single telephone company twisted pair copper wire Each B channel carries 64 kbps allowing each channel to carry a telephone call either as voice fax or internet The D channel carries 16 Kbps and manages both B channels Simultaneously two channels can be used on one line A B channel must be free for any data to be used An NTBA Network Termination for Basic Access is installed at the end users house or office and connects to the main switch board The NTBA usually acts like a PBX system as you may need to dial a prefix number to gain access to the external dial tone also you can call internally Typicall
7. cted to the same wall jack as the computer and the router has a built in DSL filter The fax and computer connections need to be split with a router refer to the image below To use this setup the router must have a built in DSL filter such as Cisco 675 router to ensure that the DSL signal is filtered from the fax connection 16 3 If the fax is connected to the same wall jack as the computer and the router does not have a built in DSL filter the fax and computer connections will need to be split with a router If the router does not have a built in DSL filter such as a Cisco 678 router an inline filter needs to be installed between the fax and the router to ensure that the DSL signal is filtered from the printer connection refer to the image below 4 If the fax is connected to the same wall jack as a computer without a built in filter the fax can also be connected to the same telephone wall jack as a computer via a splitter refer to the image below ee B J 17 PBX PBX systems operate differently than a standard dedicated line The PBX system might not have a standard dial tone that the fax will recognize until an access code usually 9 has been dialed Because there is no standard busy signal in PBX phone systems if the Oki product does not connect to another fax or detect a busy signal it will cancel the fax On a PBX system the fax might attempt to dial too quickly Insert a pause into the dialin
8. eeded to be installed so that digital and analog channels can be separated Figure 1 DSL Fax Setup Figure on the next page shows the typical configuration to connect the Oki fax product to a DSL line Connecting an Oki product to DSL Figure 1 DSL Fax Setup The DSL micro filter in Figure 1 below is only a reference The DSL micro filter may not look like this Public NOTE Some DSL micro filters have a cable that should be attached to connect them to the wall socket while others can be Telephone inserted into the wall socket directly Network DSL micro filier B LINE TEL E S 72 Connect the DSL Micro filter to the wall socket The Oki product will have an RJ 11 Fax cable supplied with it connect this to the product outlet at the back of the machine as shown in the diagram above Insert the other end of the supplied RJ 11 Fax cable into the analog outlet on the DSL micro filter Connect the PC to the DSL modem according to their respective manuals The DSL modem can be external or internal to the computer if in doubt check the specifications of your computer GA HE WARNING Not all printers and faxes are compatible with DSL services Oki does not guarantee that all Oki fax products will be compatible with all DSL service lines or providers What is a PBX Public Branch Exchange A PBX allows more then one user to be on a telephone network based on the idea that not everybody uses their local phone e
9. es cannot be sent or received or the issue cannot be determined H Faxes cannot be sent or received or the issue cannot be determined Follow these steps if none of the previous sections has helped to resolve your issue e Reinitialize the fax machine e contact Oki Technical Support for assistance I Troubleshooting and Help For information on how to set up and configure your Oki Fax product please consult the Oki User Guide for that product If necessary Contact Oki Technical Support for assistance 15 Troubleshooting and Help If you seem to be experiencing intermittent fax send and receive problems Oki recommends that you reduce the baud rate speed Lowering the speed of fax communication may solve this issue See page 10 for further explanation on baud rate speed DSL In order for analog equipment to use analog channels on a DSL line a DSL micro filter is needed to be installed so that digital and analog channels can be separated Change the micro filter if it is suspect Verify that all other analog products that are connected to the line are using DSL micro filters Other DSL Setup Configurations to Consider 1 If the DSL router is not in the same wall jack as the fax The Oki fax product can be connected to a wall jack with an inline filter installed between refer to the image below If the fax is connected without the filter there will be interference with the faxing capability 2 If the fax is conne
10. g sequence just before and after the first number Contact the phone system administrator for additional assistance ISDN ISDN is a telephone company technology that provides digital service typically in increments of 64 Kb s channels The phone company installs services within their phone switches to support this digitally switched connection service Connecting to an analog telephone port also called an R interface port on an ISDN terminal adapter may enable the Oki fax product to function on an ISDN service Contact the ISDN provider for more information and to request an R interface adapter Once all of the troubleshooting steps outlined in this document have been attempted Contact Oki Technical Support for further assistance 18
11. he other party check their line NOTE Phone line quality is the most common reason for intermittent fax failures Some old locations and buildings have inadequate phone system wiring e Check the phone cable from the wall socket to the Oki Fax product It should not be coiled or longer than necessary NOTE A coiled cable can cause cross talk or echo on the line Signal strength and quality can be lost with long cables Make sure that the original fax cable supplied with the Oki Fax product is being used Otherwise the Oki Fax product may not work correctly e Make sure that the phone cable routing and any cables not plugged into the same socket but sharing the same line is not close to any electrical appliances electric motors fans kitchen appliances or televisions and or near coaxial cables NOTE Many of these devices do not have sufficient electrical shielding and can induce electromagnetic force EMF onto the phone line e Some Oki Fax models are capable of blocking faxes sent from certain phone numbers Verify that the telephone number of the sending fax has not been blocked from the faxing software e Turn the Error Correction Mode ECM off or turn it back on depending on its current state Follow the instructions included in the Changing the Error Correction Mode ECM Setting of the users manual to learn how to modify the ECM configuration If faxes still cannot be sent or received skip to the next section Fax
12. ki product will assume all incoming calls are fax messages and automatically receive all incoming fax messages Configure the fax settings as indicated below Auto Receive Mode On Ring Response 1 ring Send a fax to the test fax machine and have someone send a fax to the Oki fax device If faxes still cannot be sent or received check the following sections and determine which one best describes your issue and follow the troubleshooting steps provided 13 E Faxes can be sent but not received Review the information below to determine the reason why faxes are not being received Verify the fax configuration and settings print configuration page s Phone company services Check whether any of the following telephone line services is enabled Voice Mail Call Waiting Billing Tone Privacy Block Security Screen Anonymous Call Rejection Privacy Manager These phone services are intended to prevent undesired calls so they may also block incoming faxes Contact the telephone company to disable these features as they can interrupt fax communication If automatic fax reception is your desired option verify that the Automatic Answering feature is enabled see configuration sheet and also ensure that the Rings to Answer value is set to a number of rings equal or larger than one see configuration sheet If an answering machine is connected to the same line fax reception problems may occur These may be corrected by changing fax se
13. l on a phone line and transmit it digitally to the receiver where the packets are reassembled With VoIP analog faxing is a challenge There are a number of problems that range from packet loss to interworking issues to signal corruption due to voice compression VoIP companies do not manage the Internet and have no way to guarantee that fax calls will work Because Oki fax products are designed to work with ordinary analog phone service Oki does not support and cannot guarantee that the Oki fax product will work with a VoIP service The general public should be made aware of the fact that not only do fax calls not work reliably over IP networks but neither do point of sale terminals security alarm systems modems or any other device that emits an analog signal It is not because VoIP is bad but simply because legacy analog technologies were not designed for the Internet Faxing with VoIP services These services are often not compatible with fax machines unless the provider explicitly states they support fax over IP services Although a fax may sometimes work on a VoIP network it may fail for the following reasons e Fax transmissions are sensitive to the timing of signals There is a slight delay in the signal because of the time it takes to create the Internet packets Internet traffic becomes heavy and packets are lost which then have to be recreated e Heavy Internet traffic also increases latency the time it takes for a packet to tr
14. ll cannot be completed stop here and contact the telephone service provider for assistance If the outgoing call is completed correctly continue troubleshooting e Have someone dial your number from another phone line to verify that the phone rings and the incoming call can be answered allow three rings before answering If the line rings briefly and then stops another device may be answering the line This device could be a credit card machine or a computer modem connected to the phone line and set to answer incoming calls Try to identify which device is answering the call disconnect it from the line and test again e If the incoming call cannot be received stop here and contact the telephone service provider for assistance D Verifying the fax configuration and settings Step 3 Follow the steps listed below to set up the fax with a basic configuration in order to test the Oki Fax functionalities e Remove any additional device sharing the phone line These devices may be plugged directly into the Oki fax product or into another wall jack on the same line including answering machines in another room or on the same phone line and any line splitters and extension cables e Connect the fax to a regular analog phone line e Print the Fax configuration page e Enable the Auto Receive Mode See the Oki product users manual Ensure that the Oki product is connected to a telephone line reserved only for fax communications The O
15. n the Oki fax product is capable of understanding To use a fax machine or any regular phone services with a DSL line a filter must be used to reserve some of the bandwidth for standard analog use This allows for the use of the telephone or fax and computer on the same line and at the same time When setting up DSL with a service provider request filters for the wall jacks where regular faxing and telephone service will also be used DSL uses digital technology to bring high bandwidth information over ordinary copper telephone wires Digital data is transmitted to the computer directly as digital data instead of analog and this allows the telephone company to use a much wider bandwidth for transmitting the data to its destination Unlike regular dialup phone service DSL provides a continuously available always on connection DSL simultaneously accommodates analog voice information on the same line DSL is generally offered at downstream data rates from 512 Kbps to about 6 Mbps However if specified during the set up of the DSL line the signal can be separated so that some of the bandwidth is used to transmit an analog signal for voice and fax or ISDN signal while the remaining bandwidth is used to transmit digital data for the internet This allows for the use of the telephone and fax and computers on the same line and at the same time In order for analog equipment to use analog channels on a DSL line a DSL micro filter is n
16. ttings or phone line connections For more information on using a TAM Telephone Answering Machine see the Oki product users manual If your line is not analog refer to How to setup the Oki Fax product on an ISDN PBX and DSL line to learn how to resolve a problem when the Oki Fax is set up over one of this kind of lines If faxes still cannot be received skip to the section Faxes cannot be sent or received or the issue cannot be determined F Faxes can be received but not sent Follow the steps below to resolve this issue Verify the fax configuration and settings Print Configuration page s Verify that the number is dialed correctly All the digits required to make a phone call from the same line must be dialed This includes digits that must be dialed to access an outside line or long distance services If the Speed Dial has been used for dialing or the fax has been sent from your computer print the page to be faxed and dial the number manually on the Oki Fax front panel Make sure that the appropriate option between Tone Dialing and Pulse Dialing is set on the Oki Fax product depending on your phone service provider or PBX 14 G Faxes fail intermittently or with only one fax number Check the following items to find out the cause of the failure e If static is present on the phone line fax communication may fail It is advisable to have the phone line checked and serviced by the telephone company or have t
17. xtension at the same time A PBX is typically installed in offices and homes The user will have more then one telephone number which benefits the user because the user will not have to pay for another separate line from the telephone companies Calls can be routed internally to the PBX A PBX baud rate speed is usually about 9 6Kpbs This is not as fast as ISDN as ISDN can be a guaranteed 64Kbps In a PBX environment you need to dial a prefix number to connect to the external public phone network this prefix number is programmed by the PBX Once realizing that a prefix number is dialed it is the first integer in the phone number the PBX knows that the caller wants to communicate to an external number outside the PBX A prefix number usually comprises of a 0 or 9 Note e PBX systems operate differently than a standard dedicated line The PBX system might not have a standard dial tone that the fax will recognize until an access code usually 0 or 9 has been dialed e Ona PBX system the fax might attempt to dial too quickly Insert a pause into the dialing sequence just before and after the first number Figure 2 PBX Fax Setup Figure 2 on the next page shows the typical configuration to connect the Oki fax product to a PBX line Connecting an Oki product to PBX Figure 2 PBX Fax Setup Public Telephone Network PBX Network LINE TEL om Telephone The Oki product will have an RJ 11 Fax cable supplied with it conne
18. y the ISDN provider will allow the ISDN users a certain range of numbers they can use For example the ISDN provider will assign a user the phone number range between 100 110 allowing 10 phone numbers and then it is up to the user on how they want to assign these numbers to the telephone equipment An A D converter analog digital converter allows analog devices to be installed on an ISDN network The A D converter routes the calls to the assigned analog ports converts ISDN signals to analog and allows analog equipment to communicate over ISDN Note e ISDN is a telephone company technology that provides digital service typically in increments of 64 Kb s channels The phone company installs services within their phone switches to support this digitally switched connection service e Connecting to an analog telephone port also called an R interface port on an ISDN terminal adapter may enable the Oki fax product to function on an ISDN service Contact the ISDN provider for more information and to request an R interface adapter Figure 3 ISDN Fax Setup Figure 3 on the next page shows the typical configuration to connect the Oki Product to an ISDN line Equipment installed on an ISDN network must be assigned a correct tag meaning what type of device is it For example Is the device a telephone modem or a fax The A D converter must program each analog port a tag Connecting an Oki product to ISDN Figure 3 ISDN Fax Setup Public
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