Use a dialstring that accesses the remote member. Note that you will get device state for the remote server, not the individual telephone, so you should have ringinuse set.
prueba2 has 0 calls (max unlimited) in ‘rrmemory’ strategy (0s holdtime, 0s talktime), W:0, C:0, A:0, SL:0.0% within 0s
Members:
SIP/trunk/107 (ringinuse enabled) (Invalid) has taken no calls yet
No Callers
It doesn’t make de call to the trunk and it stays on hold.