D1372102_T550_MXP_User_Manual
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3.13.2 Text Chat
While in an ISDN or IP call to another system supporting Text Chat (T.140), select Text Chat from
the Control Panel. Enter text in the displayed window.
How to use Text Chat:
1. Choose Text Chat from the Control Panel to open the Text Chat window.
2. Enter text with the number keys like on a mobile phone. The text is sent to the far end
continuously letter by letter.
3. Press OK to end Text Chat and escape from the text chat window.
Note that Text Chat is supported in point to point calls only.