Glossary
Comprehensive glossary of mobile industry terminology
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A data call is a phone call over the internet, also known as VoIP.
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Daily  Active Users  - the number of users who use the app or service at least once per day.  Contrasts to Monthly Active Users (MAU) – a measurement of monthly usage.
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Data Coding Schema - This is a method to define what character encoding is being used.
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Phone numbers that a mobile operator has taken out of service for an end user, the reason for that can be that the end user has switched operators or has closed their account.
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A report that is issued by certain mobile operators with information about recently deactivated numbers in the USA.
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The process of running only one service on a Common Short Code at any given time.
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Delivery Notifications are message acknowledgments. When delivering messages through the Digital Interconnect network, customers can request to receive the following types of message acknowledgment: Digital Interconnect Ack, SMS-C Ack, Handset Ack. For unsuccessful delivery attempts, a negative acknowledgment (Nack) is returned outlining the reason for failure. Note: Delivery notifications are an operator-dependent feature, and that not all operators support handset acknowledgments.
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When sending an SMS, most mobile operators will return a notification called a delivery receipt to let the sender know whether or not the message was delivered to the handset. Some Short Message Service Centers (SMSCs) will return a delivery receipt when a message has been accepted or if the message is buffered in the SMSC, for example if the handset is switched off, although not ideal this is sometimes unavoidable due to operator's restrictions.
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If an SMS is not delivered (even after the SMSC retry cycle is complete) then a delivery receipt, with an error code indicating why the message failed will be sent. A complete list of delivery receipt error codes can be found in our Developer documentation.
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Connection to a specific country by operator or route.
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A destination number is the phone number of the recipient you wish to send a message to.
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The destination operator is the operator to which the subscriber’s handset is attached. In most cases the destination operator is the home network but when a subscriber is roaming, then the destination operator will be the network on which the subscriber is roaming.
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A synonym for country code (CC).
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Disconnected Call Event (DiCE) is when a call is disconnected.
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Direct Inward Dialling (DID) is a service provided by a local phone company (or local exchange carrier) that provides a block of telephone numbers for calling into a company’s private branch exchange (PBX) system. Using DID, companies can offer customers individual phone numbers for each person or workstation within the company without requiring a physical line into the PBX for each connection.
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