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Presence of User Data Header is indicated by the TP-UDHI (Transfer Layer Protocol User Data Header Indicator) bit - 6th bit of the first octet of the GSM 03.40 or 3GPP 23.040 message. If UDH is present, it is at the beginning of the TP-UD (TP-User Data) field and it always starts with an UDHL (UDH Length) octet.
The mechanism replaces GSM 7-bit default alphabet code table and/or extended table with a national table(s) according to special information elements in User Data Header. The non-segmented message using national language shift table(s) may carry up to 155 (or 153) 7-bit characters.
In technical terms, the concatenated SMS could also be referred to as a PDU Mode SMS [dubious – discuss].The number of parts that a multi-part or PDU mode SMS message may contain depends technically upon a header message but mostly upon the device sending or receiving the SMS and also upon the service provider.
Data Coding Scheme is a one-octet field in Short Messages (SM) and Cell Broadcast Messages (CB) which carries a basic information how the recipient handset should process the received message. The information includes:
Edit; View history; General ... Download as PDF; Printable version; In other projects Wikidata item; ... UDH may refer to: Technology. User Data Header, ...
The length field is set to zero if the length of the UDP header plus UDP data is greater than 65,535. [9] Checksum: 16 bits The checksum field may be used for error-checking of the header and data. This field is optional in IPv4, and mandatory in most cases in IPv6. [10] Data: Variable The payload of the UDP packet.
An email's full headers include information about how it was routed and delivered as well as information about the true sender of the email. View the full headers to find out where an email was delayed or who really sent an email with a forged address. View an email's full header. 1. Sign in to your AOL Mail account. 2. Click on an email to ...
The value of the Application-ID field in the header is the same as any relevant Application-ID AVPs contained in the message. For instance, the value of the Application-ID and of the Auth-Application-ID Attribute in the Credit-Control-Request (CCR) and Credit-Control-Answer (CCA) Command for the Diameter Credit-Control Application is 4.