I'm testing SRST on a voice gateway. Calls coming into the gateway go to phones just fine. But when a user goes off-hook to make an outoging call they hear an immediate busy signal. This happens without them pressing any digits. Sound like something anyone has faced? It feels like PLAR gone wrong, but the only PLAR configurations on the router are plar opx <number> on a couple of FXO ports. They are configured like another router that works just fine.
Thanks.