Originator

The field essentially identifies the sender of the SMS message to the message recipient.

With a conventional mobile-to-mobile SMS message this is normally the phone number of the message sender, enabling the recipient to identify the user (by recognizing the number) and, possibly, reply back.

When sending a message from the Developer Toolkit, you can either send a mobile/landline number (which can be replied to) or any 11 (minimum 3) character alphanumeric string (perhaps a company name), which cannot be replied to.

If you do elect to send a company name, for example, then the (up to) 11 (minimum 3) characters will appear where traditionally you would see the phone number of the sender appear

The OType parameter determines whether you are sending a numeric (phone number) or alphanumeric (company name, for example) in the Originator parameter.

If a mobile phone number is sent, it must be formatted without the 0 and beginning with a + and the Country Code.

For example, for a UK mobile phone number of 07836 123 456, it would be formatted as +447836123456.