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NowSMS Support Forums ⬆ NowSMS Support - SMS Issues ⬆ Archive through December 09, 2003 ⬆ |
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| Author | Message | |||
| Anonymous |
Hi, I have a question,please help me to resolve it , thank you! when sms protocol receive message from low-layer, it maybe is normal, push ,mms notification ,ems,etc, how to distinguish them? | |||
| Bryce Norwood - NowSMS Support Board Administrator Username: Bryce Post Number: 1194 Registered: 10-2002 |
Well, there are a number of different factors that come into play. The DCS (data coding scheme) of the SMS message can include some information about the overall encoding of the message and how it should be handled. For the message types that you mention, generally the only important bit of the DCS setting is that it indicates whether the message is in a text or binary format. The User Data Header (UDH) is used by most of the special message types. (If the UDHI flag is set, this means that the data of the message starts with a UDH.) For example, the EMS specification defines many different EMS specific UDH parameters. The WAP specs use the existing UDH definitions for message concatentation and port addressing. Port addressing evolved from Nokia Smart Messaging ... in Nokia Smart Messaging, you address messages to different ports to specify whether it is a ring tone, logo, etc. WAP push also has its own port ... and the WAP push format has a content-type field so that the push can be routed to an appopriate application based upon the content type (for example, MMS is sent over WAP push). The Nokia Smart Messaging specs, which can be downloaded from the Nokia developer site, and the EMS specs which can be downloaded from the Ericsson developer site will help with some understanding of this. | |||
