Are your text messages cut short (truncated)?

New accounts are limited to a maximum of three-message-parts (459 GSM characters). 

You can update your account for sending longer messages:

  1. Log into the Web Dasboard at https://www.tnz.co.nz/
  2. Select Users | Outbound Users from the menu
  3. Click on the user you would like to update
  4. Click the Edit/Modify button
  5. Select the SMS Options tab
  6. Adjust SMS Parts Limit to match the number of allowed message parts
  7. Click the Update button
  8. Repeat these steps for other users that require updating


The SMS pricing is per SMS and SMS messages over 160 characters will be charged accordingly (e.g. 161 characters will be the quoted single SMS price multiplied by two).

Number of Characters (using GSM 7 bit encoding) Number of Message Parts Used Total Charge for Message
0 - 160 1 1x SMS Price
161 - 306 2 2x SMS Price
307 - 459 3 3x SMS Price
460 - 612 4 4x SMS Price
613 - 765 5 5x SMS Price
766 - 918 6 6x SMS Price
919 - 1071 7 7x SMS Price
1072 - 1224 8 8x SMS Price
1225 - 1377 9 9x SMS Price



However, if you send your SMS message using UCS-2 encoding, the number of characters per message is reduced to 70 characters. Some characters and symbols are not supported using the standard GSM character set, which causes your SMS message to automatically convert to UCS-2. The most common causes are curly “ and ” style apostrophes and accented é letters that are included when copying text from a Microsoft Word document into a SMS message, or use of foreign language characters (such as some Asian characters).

Number of Characters (using Unicode UCS-2 encoding) Number of Message Parts Used Total Charge for Message
0 - 70 1 1x SMS Price
71 - 134 2 2x SMS Price
135 - 201 3 3x SMS Price
202 - 268 4 4x SMS Price
269 - 335 5 5x SMS Price
336 - 402 6 6x SMS Price
403 - 469 7 7x SMS Price
470 - 536 8 8x SMS Price
537 - 603 9 9x SMS Price




See the GSM 03.38 specifications for more information.

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