1. SMS Protocol Identifier
Converting a message into different formats
The Network can be instructed to convert an ordinary short message into ?FAX?, ?X400?, ?Paging?, ?Email? or ?Voice? format with a Protocol Identifier. ?Text? is the normal setting. The remote party must be connected to an appropriate terminal device except when the message is sent in ?Text? format.
2. SMS Validity period
The Validity period specifies the time that outgoing messages are going to be stored at the Short Message Service Centre. This service is provided by the network.
3. Status report
A status report informs the sender the status of a previously sent Mobile Originated Short Message. The status of the message can be: successfully delivered to the recipient, or the Service Centre was not able to forward the message to the recipient. Expired validity period or invalid address can be permanent errors, while connection being down, or recipient temporarily unavailable can be errors of temporary nature.
4. Data Coding Scheme can be used to inform several things:
When the default class is used the user data is always coded using the 7-bit alphabet and the characters are packed in octets. The message can contain 140 octets which means 160 characters. In all other classes also 8-bit or 16-bit character coding is accepted. When 8-bit character coding is used the message may contain 140 characters and when 16-bit is used the message may contain 70 characters uncompressed user data.
?Class default? means that no specific class is in use. The short message is normally stored in the active memory of a phone.
?Class 0? means that the phone will immediately display the received short message. The message is not automatically stored.
?Class 1? means that the received message will be stored to the phone memory.
?Class 2? means that the received message will be stored to the SIM memory.
?Class 3? means that the received message is a terminal specific message. It will be stored if transferring to terminal is not possible.
The user data of the short message may be compressed using a compression algorithm. A compressed short message can contain more information than an uncompressed short message. The compression method is especially meant for unicoded short messages.
In a unicoded short message the characters are coded using 16 bits per character. This enables the use of larger character sets, for example, Chinese or Arabic characters. The maximum number of characters in a unicoded message is only 70. The support for new alphabet sets is included in both SMS and CBS.
Special SMS Message Indication
Short message announcements about fax mail, electronic mail or phone?s voice mail can be displayed by a dedicated indication by phone or by applications. It is useful for a user friendly application to be able to display a short message from a specific source by means of a dedicated indication.
5. ME memory configuration is phone model specific. Phone can either
have dynamic, static or no sms memory. In dynamic memory the number
of messages that fit into memory can vary depending on the size of
messages. In static memory number of messages that fit into memory is
6. Number of parameters in SIM/EEPROM refer to SMS parameters such
as first octet, data coding scheme, protocol identifier.., which are
used in sending phase of short messages. These are stored in SIM
memory. More information on those can be found at gsm specifications
03.40 and 03.38.