[F A Q] Subscription for fax and data service

4 thoughts on “[F A Q] Subscription for fax and data service

  1. Q:

    I have a subscription for fax and data service, but I do not succeed in transmitting.

     

    A:

    Even if fax and data service is subscribed, the service may not be
    activated by the provider. In order to determine if this is the cause of
    the problem, the following verifications should be performed:

    • Two different phone numbers have to be available. 
    • If
      both numbers are available, another simple test can be performed. From a
      normal telephone, call the number dedicated to the data service and set
      AT+CRC=1 on your module: If the module indicates "data or fax call" on
      the hyperterminal then the service has been correctly activated and the
      cause of the problem is somewhere else. Vice versa, if the line appears
      free, the provider may not have activated the service. This process will
      trouble shoot and solve a good percentage of fax and data malfunctions.
    • If only one number is available on your SIM for voice/data and fax services, re-examine the AT+CSNS setting.
  2.  The question and answer is close to my post written on the 2th, of Sep. as below:

     

    CSD call / replacement of an analogue modem

    Posted on | September 2, 2010 | No Comments

    CSD call / replacement of an analogue modem

    For the data call on GSM, UMTS or 3G also called CSD (circuit
    switched data) and replacement of an analogue modem to a wireless
    cellular modem please note the hints as below:

    • Activate auto answer and fixed baud rate may be. Store your profile with AT&W.
    • Use SIM card preferably offered by T-Mobile Germany. Deactivate the
      PIN query. Please note that Vodaphone Germany does not allow the
      deactivating of the PIN query as standard. For other countries we can
      help with recommendations on request by email.
    • Standard SIM cards (Pay as you go, prepaid and SIM cards with
      subscription) support outgoing data calls only. Please make sure to
      have this service activated on your SIM card by the GSM operator for
      the first tests. For incoming data calls you will need a special
      subscription. Pay as you go/ prepaid SIM cards often do not support
      incoming data calls.
    • Five further hints at my site.
    • In the final application we recommend a SIM card that support “Data
      Only”. Data Only SIM cards of T-Mobile supports incoming and outgoing
      data calls and GPRS and SMS as well. We also can help with special
      tariff contracts and European data flat rates.
    • Force bearer type with AT+CSNS=4 to data permanently so that by
      multi numbering and call from an analogue modem a data connection can
      be set up. Please note that worst case the GSM base station sends no
      bearer code. The default bearer in most GSM modems is voice. If no
      bearer code will be forwarded, the modem will connect a voice call and
      this will then end in a “No carrier” message at the calling modem.
    • Please take care that the GSM operator that you will use supports
      CSD data calls. In USA, Canada and by a few operators in South America
      CSD is not supported. They offer packet switched data on GPRS (GPRS)
      only!
    • Take care that some GSM networks are supporting V.32 and other the
      V.110 protocol better. The protocols can be changed by using of
      AT+CBST. If the changing of the parameters of the selected protocol can
      optimise the communication. If you are able to change the settings of
      used protocol by SMS, then you will be able to optiimise the protocol
      and parameters remotely by SMS.

    For further question on CSD, modem call, analogue modem to GSM
    connection, ISDN, V.32, multi numbering, single numbering just give us
    a call or better an email. Normally we heard about all issues around
    GSM to GSM, GSM to PSTN analogue, GSM to ISDN, ISDN to GSM, PSTN
    analogue to GSM data communication by our last 15 years in consulting
    and support in GSM and GPS communication before. We will be glad to
    support you too.

     

    I hope my tips and hints will help you.

    Best regards from Germany

    Harald Naumann

    1. Hello,

      I am experiencing something similar to your description in bullet 6 below. When a call is made from a fix station using an analog modem, towards GL865 based mobile terminal, GL865 receives this call as a voice call and do not start handshaking. After some time calling modem terminates with NO CARRIER.

      Outgoing calls from GL865 to the same fixed station equipped with an analog modem works fine.

      Related settings in GL865 are

      “+FCLASS=0”, // data calls

      “+CRC=1”, // enable extended result codes for incoming calls
      “+CLIP=1”, // enable calling line identification presentation
      “+CR=0”, // disable service reporting
      “+CSNS=4”, // allow incoming data calls only
      “+CBST=7,0,1”, // mobile to fix calls (9600 bps V32, async data circuit, non-transparent)

      Any suggestions?

      Kerem

       The question and answer is close to my post written on the 2th, of Sep. as below:

       

      CSD call / replacement of an analogue modem

      Posted on | September 2, 2010 | No Comments

      CSD call / replacement of an analogue modem

      For the data call on GSM, UMTS or 3G also called CSD (circuit switched data) and replacement of an analogue modem to a wireless cellular modem please note the hints as below:

      • Activate auto answer and fixed baud rate may be. Store your profile with AT&W.
      • Use SIM card preferably offered by T-Mobile Germany. Deactivate the PIN query. Please note that Vodaphone Germany does not allow the deactivating of the PIN query as standard. For other countries we can help with recommendations on request by email.
      • Standard SIM cards (Pay as you go, prepaid and SIM cards with subscription) support outgoing data calls only. Please make sure to have this service activated on your SIM card by the GSM operator for the first tests. For incoming data calls you will need a special subscription. Pay as you go/ prepaid SIM cards often do not support incoming data calls.
      • Five further hints at my site.
      • In the final application we recommend a SIM card that support ?Data Only?. Data Only SIM cards of T-Mobile supports incoming and outgoing data calls and GPRS and SMS as well. We also can help with special tariff contracts and European data flat rates.
      • Force bearer type with AT+CSNS=4 to data permanently so that by multi numbering and call from an analogue modem a data connection can be set up. Please note that worst case the GSM base station sends no bearer code. The default bearer in most GSM modems is voice. If no bearer code will be forwarded, the modem will connect a voice call and this will then end in a ?No carrier? message at the calling modem.
      • Please take care that the GSM operator that you will use supports CSD data calls. In USA, Canada and by a few operators in South America CSD is not supported. They offer packet switched data on GPRS (GPRS) only!
      • Take care that some GSM networks are supporting V.32 and other the V.110 protocol better. The protocols can be changed by using of AT+CBST. If the changing of the parameters of the selected protocol can optimise the communication. If you are able to change the settings of used protocol by SMS, then you will be able to optiimise the protocol and parameters remotely by SMS.

      For further question on CSD, modem call, analogue modem to GSM connection, ISDN, V.32, multi numbering, single numbering just give us a call or better an email. Normally we heard about all issues around GSM to GSM, GSM to PSTN analogue, GSM to ISDN, ISDN to GSM, PSTN analogue to GSM data communication by our last 15 years in consulting and support in GSM and GPS communication before. We will be glad to support you too.

       

      I hope my tips and hints will help you.

      Best regards from Germany

      Harald Naumann

      1. Dear Kerem,

        the +CSNS, single numbering scheme allows to pick up and incoming call as data, in case the call is received with “no bearer capabilities” or with “data bearer”.

        If the call is originated as voice or during the transition between PSTN/ISDN line and mobile network, the bearer capabilities are indicated as voice, the module can only pick up the call as voice and not as data.