The system is:
1. Dial 1585
2. You will get a registration no. [ say 10].
3. Whe ur turn comes, you will get a call from the telegraph office asking you to give the telegram details.
4. If you are sending same communication to 'N' no. of people, you can read the body of the message once.
5. Give them addresses of receivers.
6. Give them sender's name and address.
7. Collect the alphanumeric code from them [ e.g.K11-K20 for 20 no. of telegrams] for future reference.
8. Telegrams will be delivered at the receivers end .
8. If the telegram is not delivered, they will come back and inform you.
This gives you the advantage of both [i] written communication [document record like physical interview call letter] and [ii] ensures faster reach [like email]. I am sure this will give you better Attended-to-called ratio.
This is the best way for reaching rural areas where there is not email/computer facility.. and police who are biased against you.