Alphanumeric sender ID

An alphanumeric sender ID allows the sender to set a custom sender name using any combination of numeric and alpha characters. This makes it easier for the recipient to recognize the sender. However, it can only be used for one-way messages as the recipient cannot reply to a message sent with an alphanumeric sender ID.


American Standard Code for Information Interchange (ASCII) is a character encoding scheme representing the English alphabet.


An interaction is said to be asynchronous when the associated messages are chronologically and procedurally decoupled.


Binary SMS messages are used to send various types of rich content, such as ringtones, telephone system settings and WAP-Push via SMS. A binary SMS message can have a maximum of 140 bytes of data. This data can be split into two components: the user data header (UDH) and the content data. The UDH specifies the type of data being sent.


Country Codes (CC) are telephone dialling prefixes defined by the ITU-T in standards E.164. Each CC is composed of 1-3 digits and identifies a specific country, e.g., the country code for the UK is 44.

Concatenated SMS

A concatenated short message service is used to overcome the limitation on the number of characters that can be sent in a single SMS message transmission (usually 160 chars). Using this method, long messages get split into smaller ones and recombined at the receiving end, with each split message billed separately. With this feature, the complete message appears to the recipient as a single long SMS message (a concatenated SMS message). On networks which do not support Concatenated SMS, each smaller message is delivered as an individual SMS message.


Delivery Receipt. A message that tyntec sends to the customer, containing information for messages delivered to the handset.


Dual-Tone Multi-Frequency (DTMF) signalling is a telecommunication signalling system used between telephone equipment and other communications devices and switching centers.


Electronic Number mapping system is a protocol that uses the Internet DNS system to translate E.164 telephone numbers into IP addressing schemes (like SIP, H323 or email).

Fixed sender ID

A fixed sender ID is a predetermined numeric ID that’s identical to the mobile number displayed on the recipient's mobile phone. Unlike an alphanumeric sender ID, it cannot be modified as it follows the standard MSISDN format defined by the ITU Telecommunication Standardisation Sector.

Flash SMS

A flash SMS message appears directly on the main screen of recipient's mobile phone without user interaction. It’s mostly used to catch immediate attention of the recipient, and is not automatically stored in the SMS inbox. Common use cases include emergency alerts and one-time passwords.

Global Title

A Global Title (GT) is an address used in the Signalling Connection Control Part (SCCP) protocol for routing signalling messages across telecommunications networks. The structure of a GT for ITU-T applications is defined in ITU-T Recommendation Q.713, and further extended in the supporting numbering plan standards. Other national variants of SCCP define their own format for GT, resulting in a variety of formats. Although a GT, in theory, is a unique address that refers to only one destination, in practice, its destinations can change over time.

GSM 3.40

GSM 3.40 is a mobile telephony standard governed by European Telecommunications Standards Institute (ETSI) that describes the format of the Short Message Transfer Protocol, enabling technical realization of the Short Message Service.


The H.225 protocol, belonging to H.323 family of protocols, is a binary VoIP protocol used for call signalling and media stream packetization.


The Home Location Register is a database of all mobile subscribers for a mobile network containing subscriber identities, telephone numbers, associated services and general information about subscriber locations.


The Hyper Text Transfer Protocol is an application protocol used for data communication over the World Wide Web.

HTTP request

An HTTP request is sent to a webserver by a client using the HTTP protocol. The request contains all necessary data to execute the response, e.g., a request message from a client to send a short message to a mobile phone.

HTTP response

The response to an HTTP request sent to a client by a webserver. It contains the status of the issued request. (In tyntec’s case, it is used to acknowledge the receipt of the originated message by the customer; and may also contain tyntec’s message reference code.)


The Internet Engineering Task Force is an open standards organization that develops and promotes Internet standards.


An International Mobile Subscriber Identity (IMSI) is a unique identification associated with all mobile/cellular networks, and used to identify the user of a mobile network. The IMSI is used in any mobile network that interconnects with other networks. For GSM, UMTS and LTE networks, the  IMSI is provisioned in the SIM card. An IMSI has two parts: The first part, which is comprised of six digits in the North American standard and five digits in the European standard, identifies the subscriber's GSM network operator in a specific country. The second part is allocated by the network operator to identify each subscriber.

Local time stamp

As a feature of SMS-MT, a local time stamp displays the local time of the home network. The feature helps senders schedule their messages according to the local time of receivers.


Mobile Country Codes (MCCs) are defined by ITU-T and used to identify mobile stations in wireless telephone networks, particularly GSM. Each MCC consists of 3 digits, with the first digit identifying the region, e.g. 234 for UK.


A Mobile Network Code (MNC) is used to identify a mobile network operator in a specific mobile country. Each MNC consists of 2 or 3 digits, e.g. 58 for Manx Telecom.


Mobile Number Portability is a service that allows mobile subscribers to switch over to another mobile service provider while retaining their existing mobile phone number.


A Mobile Switching Center (MSC) is the centrepiece of a network switching subsystem, and performs various communications switching functions, including call set-up, call routing, and SMS message routing.


A Mobile Station International Subscriber Directory Number (MSISDN) is a number uniquely identifying a subscription in a GSM or UMTS mobile network.


A Mobile Station Roaming Number is an E.164 defined telephone number used to route telephone calls in a mobile network.


A National Destination Code (NDC) is used, as an optional code field, to identify a telephone network or telephone operator within the E.164 number plan.

Numeric sender ID

A sender ID consisting of numeric numbers only. It’s the default sender type of SMS message in standard MSISDN form. It can be used for two-way messages as the recipient can reply to a message sent with a numeric sender ID.


Over The Air (OTA) is a standard for the transmission and reception of application-related information in a mobile communications system. It’s commonly used for sending configuration messages, such as software updates, configuration settings and security locks.


A One-Time Password (OTP) SMS is a password sent via SMS that’s valid only for one session or transaction.


Public Switched Telephone Network refers to the international telephone system based on copper wires carrying analog voice data.


Request for Comments (RFC) is a formal document from the IETF, containing a series of memos encompassing new research, innovations, and methodologies applicable to the Internet. RFC documents are issued with a unique serial number.


The Real-Time Transport Protocol (RTP) is a network protocol for delivering audio and video over IP networks. It was first published in 1996 as RFC 1889, and superseded by RFC 3550 in 2003.


The Session Description Protocol (SDP) is a format used for describing streaming media initialization parameters. It was first published in 1998, and superseded by RFC 4566 in 2006.


The Session Initiation Protocol (SIP) is an application-layer protocol for signalling and controlling multimedia communication sessions. It is a text (ASCII) based protocol similar to HTTP.


The Short Message Peer-to-Peer protocol (SMPP) is a telecommunications industry protocol for exchanging SMS messages between Short Message Service Centers (SMSCs) and/or External Short Messaging Entities (ESMEs).


SMS Mobile Originated (SMS-MO), also known as Inbound SMS, is the ability of a network to transmit an SMS that a subscriber sent from a mobile phone.


SMS Mobile Terminated (SMS-MT), also known as Outbound SMS, is the ability of a network to transmit an SMS to a mobile phone subscriber.


A Short Message Service Centre (SMSC) is an element of a mobile telecommunications network that handles SMS operations, such as storing, forwarding, converting and routing, in order to deliver incoming messages to their desired endpoints.


Simple Object Access Protocol (SOAP) is a messaging protocol that allows programs running on different operating systems to communicate using HTTP and its language XML. It consists of three parts: an envelope that defines a framework for describing what is in a message and how to process it; a set of encoding rules for expressing instances of application-defined data types; and a convention for representing remote procedure calls and responses.

SOAP Application

A SOAP Application is a software that produces, consumes or otherwise acts upon SOAP messages in a manner conforming to the SOAP processing model.


SOAP Body is the body element of a SOAP message that acts as a container for the data being delivered. The data within the SOAP body is often referred to as the “payload.”

SOAP Envelope

SOAP Envelope is the top element of the XML-based document describing what is in a message and how to process it.

SOAP Header

SOAP Header is the header element of a SOAP message, and is encoded as the first immediate child element of the SOAP Envelope that identifies the XML document. All immediate child elements of the Header element are called header entries.


Signalling System 7 (SS7) is an international telecommunications standard that defines how network elements in a public switched telephone network exchange information over a digital signalling network, it’s also used in mobile messaging, number portability, prepaid billing and other services.


An interaction is said to be synchronous when the participating agents must be available to receive and process the associated messages from the time the interaction is initiated until all messages are actually received or some failure condition is determined. The exact meaning of “available to receive the message” depends on the characteristics of the participating agents (including the transfer protocol it uses); it may, but does not necessarily, imply tight time synchronization, a blocked thread, etc.

TON/NPI settings

Type Of Numbering (TON)/Number Plan Indicator (NPI) settings are used to manage originator and destination settings.


User Data Header (UDH) is a binary structure which may be present at the start of a short message in an SMS. It does not contain any text, but it specifies the type of message being sent, providing information as to how the message should be formatted and processed.


The User Datagram Protocol (UDP) is a transport layer protocol, one of the core protocols of the Internet protocol suit.


The Unicode standard is a character coding system designed to allow computers to consistently represent and manipulate text expressed in any of the world's writing systems. As an SMS-MT feature, it allows any content to be sent within a message.


Voice over Internet Protocol (VOIP) is a methodology and technologies for the delivery of voice communications and multimedia sessions over IP, using standards such as SIP and RTP.

WAP Push

Wireless Application Protocol (WAP) Push is an encoded message that includes a link (URL) to direct a mobile subscriber to a web URL. It allows WAP content to be pushed to the mobile handset with minimum user intervention.


Web Services Description Language (WSDL) is an XML format for describing the functionality offered by a web service. The operations and messages are described abstractly, and then bound to a concrete network protocol and message format to define an endpoint. Related concrete endpoints are combined into abstract endpoints (services). WSDL is extensible to allow description of endpoints and their messages regardless of what message formats or network protocols are used to communicate.


Extensible Markup Language (XML) is a markup language for specifying document content (i.e. data). XML is not a single, predefined markup language; it is a meta language, a language for describing other languages, which is used to design a customized markup language.