These silver trumpets have two primary purposes: to summon the congregation and to set out on their journey. The silver trumpet is used to make people alert and get attention. It is also used to sound the alarm of battle. It is the High Priest or His representatives who are to blow these silver trumpets. This job cannot be performed by a person who is not of the priestly line. It will be like this in the end time, as well, when a representative of our High Priest Yeshua will blow the final trumpet blasts to summon His people to resurrection and war against evil.