Terms and definitions in messaging

Multichannel messaging service is based on a variety of telecommunication and Internet technologies. In the description of services, we often use abbreviations that may not always be known to you. Here we have compiled a glossary of terms and definitions used in the industry.

Delivery Receipts (DLR)

When sending an SMS message, 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 operators restrictions.