Flash hook to SIP channel

I have several Sipura/Linksys SPA-3000’s attached to analog lines and extensions of key systems around our buidlings. Inorder to send commands to the Nortel key systems I need to send a flash hook to the FXO port of the spa. One example is that I need to be able to page over this connection and the command on the analog extension of the Nortel is Flash, dial 6011. I was hoping it would be as easy as dial(sip/6989/WFW6011), but obviously the F is not recognized. The Flash() function does not work because it will only flash zap channels. I am looking for a method to flash the sip channels.

Any advice is greately appeciated,


I’m trying the same thing, Any luck?