Low, high and bulk volume Mobile Terminated (MT) SMS are sent through HSL's systems to over 400 networks worldwide in seconds. SMS messages can communicate a wide range of information including general text, chat messages, server alerts, information updates, Multimedia Messaging Services (MMS) notifications and other forms of data.

HSL's messaging gateway allows SMS messages generated from a software application to be routed to a mobile telephone quickly, reliably and cost effectively. There are four ways in which clients can use the service to send SMS messages:-

SMTP (email)

The simplest method of using the SMS services is through the Simple Mail Transfer Protocol interface. This uses an everyday email application to allow the sending of an SMS by composing an email.

SMPP (Short Message Peer to Peer)

An application supporting SMPP can send SMS directly to HSL's systems for delivery to mobile telephones. Our messaging infrastructure supports SMPP v3.3 and v3.4.

HTTP (HyperText Transfer Protocol)

An application supporting HTTP can send SMS directly to HSL's systems for delivery to mobile telephones. We offer two separate HTTP interface specifications to cater for simple and sophisticated requirements.

Web Service (SOAP/XML)

An application supporting Web Services can send SMS directly to HSL's systems for delivery to mobile telephones.

Further details regarding the technical requirements and specifications for these can be found in the Info & Docs section, or alternatively if you would like to contact us we will happily discuss the options further.

The sending of SMS through HSL's systems is facilitated through our 'Advanced Services' accounts, each of which is compatible with the above interface options, and further details regarding the accounts can be found in the Account Pricing section.

If you would like technical information regarding the integration of your own application for use with HSL's accounts, please visit the Developers section.