[arm-allstar] linkunkeyct on sip extension

[Danny K5CG]

I've decided to connect up a VoIP phone again to my node and I thought that when I had this working previously and I would use *99 and # for PTT control, there was a courtesy tone that went out over the air. 

It is not doing that now, so maybe I am misremembering. 

It does however send a courtesy tone when a linked node unkeys (or dvswitch - any IAX connection). 

Please set me straight on this function, or if you have any idea what might be set incorrectly, let me know. 

Thanks 

73 
Danny, K5CG 
Node 480361