1- Receiving a telegram in a dream highlights communication in the most efficient way possible under the circumstances. It indicates that a part of ourselves is attempting to give us information in a way that is going to be remembered. As communication technology becomes more efficient, we are much more likely to dream of a fax or a fax machine (see Fax), ‘fo be sending a telegram can suggest that we wish something to be known about ourselves that cannot be communicated verbally.
2- Previously, telegrams were messages of celebration or bad news.
For many; that image is still retained in dreams.
For instance, to receive a telegram of wedding congratulations may- link with the dreamer’s wish to be married. On the other hand, a telegram bearing bad news may be alerting us to something of which we arc alrcadv aware on a subconscious level.
3- Any communication received in writing is to do with making knowledge, in this ease spiritual knowledge, tangible.... Ten Thousand Dream Dictionary