SendText to recipient not caller

Our GXP-2000 phones now support the SendText function, so testing it with a test onhold extension:

exten => 125,1,Answer
exten => 125,2,SendText(Hello There)
exten => 125,3,MusicOnHold(default)
exten => 125,4,Hangup

Which worked perfectly, I got the text appear on my phone when I called 125.

BUT, what I’m after is this scenario:
External person calls the company and gets our IVR, selects a menu option and gets dropped into a queue.
The person who answers the queue gets a SendText message stating ‘Person arrived via IVR’ or something similar.
Is this possible??