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A random number sequence assigned by the administration body to the company leasing the short code.

Document issued by Sales Account Management to provide commercials and coverage per destination.

Route Cause Analysis - The process of trying to determine what was actually the route cause of a problem.

Rich Communications Service – a GSMA standard messaging suite that is the successor to SMS/MMS – based on consolidated GSMA standards call Universal Protocol that is gaining momentum and it being heavily promoted as a leading A2P channel. It supported by Google, the GSMA, Vodafone Group and operators around the world.

Reach is a term commonly used in the SMS ecosystem to describe the destinations each mobile operator can send a message to. Reach is determined by commercial agreements, technical connectivity, and hub arrangements etc. A typical tier one mobile operator will have reach to hundreds of other mobile operators. If T-Mobile can send a message to Vodafone UK, then you would say T-Mobile has reach to Vodafone UK.

Whenever you use Sinch services, in one way or another, you are interacting with a resource. These resources are either exposed directly through one of our REST APIs or indirectly through one of our applications.  Examples of resources are phone numbers, messages, calls and conversations.  

A message created by a client that is received, acknowledged, and performed by a server.

An acknowledgement or status message created by a server that is received by a client.

Representational State Transfer (REST) is an architectural style for designing distributed systems. It is not a standard, more a set of constraints such as being stateless, having a client / server relationship, and a uniform interface.

When an SMS message is sent to a recipient, it is expected it will be delivered to the handset within seconds. However, delivering an SMS is a relatively complex process, and an SMSC takes several measures to ensure a reliable service including retrying a message should it fail to deliver. An SMS may fail to deliver to a handset on its first delivery attempt for many reasons. These reasons can either be temporary or permanent, and if the latter, no additional retries will be attempted, and the delivery notification will be sent back to the sender to confirm the message failed.

Revenue Share is an integral part of Premium SMS. It is a billing mechanism that enables content providers to charge end-users to participate in mobile marketing events, also known as reverse billing. Charges are made by the wireless carrier directly to the mobile subscriber's account and share of charges or revenue is split between the operator, the content provider and the aggregator. Revenue Sharing message types include: - Premium SMS - Premium MO - Premium MT - Premium 2-way.

Radio Frequency Identification (RFID) is a technology using electromagnetic fields to read data store in tags embedded in other items such as ID cards.

When a subscriber travels outside their home operator service area, we say they are roaming onto another network. It is important SMS messages are still delivered correctly when a subscriber is roaming, and as such the foreign network’s VLR communicates with the HLR of the home network to ensure the location of the subscriber is maintained at all times. It should be noted that even while roaming, a subscriber will always send a message via their home SMSC.

A routing class is a term used by Sinch to explain a collection of routing attributes that together define the overall quality and performance of the SMS product. For example, the direct routing class is a made up of all Sinch’s direct connections and its own SMSCs to create a very high-quality set of routes used for mission critical services.

Real Time Communication (RTC) is live, instant communication with minimal latency.

Report Transaction Event.

Real-Time Lookup is based on real-time HLR queries only and is commonly used for authentication services where additional information in addition to MCC+MNC is needed.

Real Time Protocol (RTP) is a network protocol for delivering audio and video over IP networks.