mber. 2. The shop connects to the bank to verify that the card is valid and that there is enough money/credit on your account. 3. The bank responds with a Yes or No. 4. You get confirmation on your purchase or a message that you don't have enough money. 5. The bank will bill your account for the purchase. 6. The goods will be delivered. (This is really easy when you buy software, somewhat worse for hardware.) As mentioned in Chapter 5 there is a need for a large number Understanding Changing Telecommunications - Building a Successful Telecom Business American Express / American Express / Figure 8.22 E-commerce example of application support servers, such as bank servers, education servers, advertising servers, game servers. Figure 8.23 shows a sequence for buying tickets for the train. Messaging Enablers The messaging class is not very demanding regarding the transfer since there are no time requirements. Instead, there is a demand for enablers in the network and in the terminal devices. The messages are stored and forwarded. For MMS, the size of the messages is up to 100 kbytes. GSM 1 1. View time table 2. Order ticket 3. Make offer 4. Present offer/Password request 5. Password reply 6. Payment transaction request 7. Payment transaction confirmation Train: 8. Payment confirmation Time table 9. Confirmation of ticket reservation Mobile and payment Journey planner e-Pay Ticket reservation Your reference Mobile operator # 8364A2 service network London Paris Today Train company Departure time 10:45 network Arrival time 11:55 One way Paid via Credit card Credit card 1 adult, window seats company network WELCOME Figure 8.23 Application support (called mobile e-pay) for buying train tickets Service Implementation Goal - The multimedia message service (MMS) provides an intelligent environment for the very promising multimedia mobile messaging service. MMS is primarily designed for UMTS and GPRS. Access to MMS services should, however, eventually be independent of access point. Multimedia messages should then be accessib