1 / 17

The Short Message Service Centre SMSC

The Short Message Service Centre SMSC. SMSC. MAST. MAST. LOCAL MOBILE NET . ME. ME. The Short Message Service (SMS) The SMS service uses part of the bandwidth capacity of the existing 2G voice network.

nonnie
Télécharger la présentation

The Short Message Service Centre SMSC

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Short Message Service Centre SMSC SMSC MAST MAST LOCAL MOBILE NET ME ME

  2. The Short Message Service (SMS) The SMS service uses part of the bandwidth capacity of the existing 2G voice network. It was originally intended for use by the mobile phone companies to contact their operatives in the field undertaking maintainance work The SMSC relays SMS messages from a Mobile Equipment (ME) to another ME The SMS is sent to the nearest call mast, forwarded to the SMSC. The SMSC stores the SMS and then attempts to deliver it to the destination ME. After a preset period of time, known as the Validity Period, the message is deleted from the SMSC if it cannot be delivered. The SMS can also be forward on to a computer or logical ME is the mobile network's LAN.

  3. INTRODUCTION TO DATA OVER GSM ANALOGUE – e.g V22 etc SHORT MESSAGE SERVICE – SMS GPRS BASIC SMS COMMANDS AT+CMGS=”+447967123456” > ENTER TEXT CONTROL Z AT+CMGR=NN AT+CMGD=NN AT+CMGW=”+44796123456” > ENTER TEXT CONTROL Z AT+CMSS = NN

  4. HOW TO FORMAT AN SMSC AN SMSC IS A LOGICAL ME NUMBER e.g. 07976 123456 1) Always use International dialling code 44 7967 123456 2) Prefix by 19 to identify this as an international dialling code 19 44 7967 123456 3) Ensure there are always a pair of digits, if not back-fill with an F e.g. if we started with 07967 12345 we get 19 44 7967 12345F 4) Avoid national dialling codes as you never know where your code will be installed national dialling codes are prefixed by 18 5) Transmit as packed BCD, which requires the BCD nibbles to be swapped around to ensure the first digit sent is the first number in the string 91 44 97 76 21 43 65 6) Prefix this all with the byte count to tell the ME how long the SMSC number is FINAL STRING 07 91 44 97 76 21 43 65 OR JUST SEND 00 FOR THE LENGTH WHEN TRANSMITTING THE ME WILL USE THE DEEFAULT PRE-SET SMSC NUMBER

  5. SMS SUBMIT SMSC 00

  6. SMS SUBMIT SMSC 00 SUM_SUBMIT 11 If set it means that the User Data has a command header prefix which contains more instructions as to how to use the data field – e.g. Multi-part messaging User Header Courtesy of Dream Fabrics

  7. SMS SUBMIT SMSC 00 SUM_SUBMIT 11 Request that the SMSC advise the ME of the status of the SMS forwarding e.g. proof of delivery Status Report Courtesy of Dream Fabrics

  8. SMS SUBMIT SMSC 00 SUM_SUBMIT 11 Validity Period How to intepret the VP field, relative, enhanced, absolute or not-used Courtesy of Dream Fabrics

  9. SMS SUBMIT SMSC 00 SUM_SUBMIT 11 Reject Duplicate SMS Courtesy of Dream Fabrics

  10. SMS SUBMIT SMSC 00 SUM_SUBMIT 11 Reply path exists All commercial SMSC's ignore this Message Type Indicator 01 = SMS Submit Courtesy of Dream Fabrics

  11. SMS SUBMIT SMSC 00 SUM_SUBMIT 11 Reference Number 00 lets the ME decide Courtesy of Dream Fabrics

  12. SMS SUBMIT SMSC 00 SUM_SUBMIT 11 Reference Number 00 lets the ME decide Destination Address Length in digits excluding International dialling byte 0C International Dialling 19 Then the Number itself 44 7967 123456 0C 91 44 97 76 21 43 65 Courtesy of Dream Fabrics

  13. SMS SUBMIT SMSC 00 SUM_SUBMIT 11 Reference Number 00 lets the ME decide Destination Address 0C 91 44 97 76 21 43 65 Courtesy of Dream Fabrics

  14. SMS SUBMIT SMSC 00 SUM_SUBMIT 11 Reference Number 00 lets the ME decide Destination Address 0C 91 44 97 76 21 43 65 PID or Protocol Identifier e.g. SMS, Telefax, Telex, Voice, EMRES, Paging, Teletex, Universal Computer Interface, X400, email and a few more But we only use SMS which is 00 Courtesy of Dream Fabrics

  15. SMS SUBMIT SMSC 00 SUM_SUBMIT 11 Reference Number 00 lets the ME decide Destination Address 0C 91 44 97 76 21 43 65 PID 00 DCS Data Coding Scheme Courtesy of Dream Fabrics

  16. SMS SUBMIT SMSC 00 SUM_SUBMIT 11 Reference Number 00 lets the ME decide Destination Address 0C 91 44 97 76 21 43 65 PID 00 DCS 00 Validity Period AA = 4 days User data prefixed by a data length – NOTE 7-bit data is compressed into 8 byte memory Courtesy of Dream Fabrics

  17. SMS DELIVER SMSC 0791449776214365 SMS_DELIVER 04 Sender Address 0C 91 44 97 76 21 43 65 PID 00 DCS 00 Time Stamp – Year, Month, Day, Hours, Minutes, Seconds, Time Zone Reverse BCD User data prefixed by a data length – NOTE 7-bit data is compressed into 8 byte memory Courtesy of Dream Fabrics

More Related