If one of the parties attempts to send information over the unsecured XMPP signalling channel tha t the other party expects to receive over the encrypted data channel, the receiving party SHOULD return a ¬acceptable; error to the sender, including a <security-required/> element qualified by the 'urn:xmpp:jingle:errors:1' namespace. An example follows.
+If one of the parties attempts to send information over the unsecured XMPP signalling channel that the other party expects to receive over the encrypted data channel, the receiving party SHOULD return a ¬acceptable; error to the sender, including a <security-required/> element qualified by the 'urn:xmpp:jingle:errors:1' namespace. An example follows.