Trustworthy, administrator
216
edits
Changes
ETT
,no edit summary
==Method of Operation==
If signalman A wishes to send a train will send the "Call Attention" bell signal. When signalman B at the other end of the section acknowledges the "Call Attention" bell signal signalman A will send "Is the line clear for (the particular type of train)" ''n.b. there are different signals for different train types''. If the signalman B accepts the train they will respond by repeating the bell code but keep the bell plunger held in on the final beat of the signal. Keeping the plunger held in releases the mechanism of signalman A's token instrument if no other token has been removed, so he or she can remove a token. When signalman A withdraws the token from the instrument both signalmen will set their indicators to show that a token is out, and which direction it is travelling in.
Removing the token will unlock the section signal which allows trains to enter the single line between the two signal-boxes. Signalman A will clear this signal, put the token into a token carrier, and give it to the footplate crew. The token recipient will read out loud the signal box names as a further means of checking they have the correct token for the single line section they are to pass over. As the train departs, signalman A will check it is showing the correct tail lamp at the end of the train, and send "Train Entering Section" to signalman B.
