Sure, the TRK command from the MTA phone includes "TN". See the beginning of the overlay books to learn all the commands possible from a maintenance phone.
However, it's easier is to just use Barge-In from an Attendant Console:
Loop Key + Barge In + Route Access Code + Member Number + # + Phone Number to dial
Looks like I will have to use the attendant console. The maintenance phone will not allow me to use the TRK command to test channels on a PRI. It says use LD 60 but there are no commands in LD 60 to test individual channels.
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